{"id":1353,"date":"2019-10-25T09:23:31","date_gmt":"2019-10-25T01:23:31","guid":{"rendered":"https:\/\/199604.com\/?p=1353"},"modified":"2019-10-25T09:23:31","modified_gmt":"2019-10-25T01:23:31","slug":"postgresql%e4%b9%8b%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/199604.com\/1353","title":{"rendered":"postgreSQL\u4e4b\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"

\u4ee5\u4e0b\u662f\u81ea\u5df1\u7ed3\u5408postgreSQL\u6587\u6863\u624b\u518c\u603b\u7ed3\u6574\u7406\u7684\u5165\u95e8\u624b\u672d\uff0c\u5982\u6709\u4e0d\u4e25\u8c28\uff0c\u8bf7\u5230\u5b98\u65b9\u6587\u6863\u624b\u518c\u67e5\u770b\uff1ahttp:\/\/www.postgres.cn\/docs\/10\/index.html<\/a><\/p>\n

\n

\u6570\u5b57\u7c7b\u578b<\/h3>\n

pgsql\u652f\u6301\u7684\u6570\u5b57\u7c7b\u578b\u6709\u6574\u6570\u7c7b\u578b\u3001\u7528\u6237\u6307\u5b9a\u7cbe\u5ea6\u7c7b\u578b\u3001\u6d6e\u70b9\u578b\u3001\u548cserial\u7c7b\u578b(\u81ea\u589e)<\/p>\n

\u6570\u5b57\u7c7b\u578b\u56fe\uff1a<\/p>\n

<\/div><\/p>\n

\u6574\u6570\u7c7b\u578b<\/h4>\n

smallint\u3001integer\u3001bigint\u90fd\u662f\u6574\u6570\u7c7b\u578b\uff0c\u5b58\u50a8\u4e00\u5b9a\u8303\u56f4\u7684\u6574\u6570\uff0c\u8d85\u51fa\u8303\u56f4\u5c06\u4f1a\u62a5\u9519\u3002<\/p>\n

PS\uff1a<\/p>\n

smallint\u5b57\u6bb5\u5b9a\u4e49\u65f6\u53ef\u4ee5\u5199\u6210int2,integer\u6bd4smallint\u5927\uff0c\u6240\u4ee5\u662fint4(\u6700\u5e38\u7528\u7684\u6574\u6570\u7c7b\u578b\uff09\uff0c\u540c\u7406bigint\u53ef\u5199\u6210int8.<\/p><\/blockquote>\n

\u4efb\u610f\u7cbe\u5ea6\u6570\u5b57<\/h4>\n

\u7c7b\u578bdecimal\u548cnumeric\u662f\u7b49\u6548\u7684,\u53ef\u4ee5\u5b58\u50a8\u975e\u5e38\u591a\u4f4d\u7684\u6570\u5b57. \u6bd4\u5982numeric\u7684\u8bed\u6cd5\uff1a<\/p>\n

1.numberic(precision,scale)\r\nprecision:\u6307\u5168\u90e8\u4f4d\u6570\uff0c\u5fc5\u987b\u4e3a\u6b63\u6574\u6570-->\uff08\u7cbe\u5ea6\uff09\r\nscale:\u6307\u5c0f\u6570\u90e8\u5206\u7684\u6570\u5b57\u4f4d\u6570\uff0c\u53ef\u4ee5\u4e3a0\u6216\u8005\u6574\u6570-->(\u6807\u5ea6)\r\n2.numberic(precision)\r\n3.numberic<\/pre>\n
PS:<\/p>\n
numberic\u7c7b\u578b\u6027\u80fd\u6bd4\u6574\u6570\u7c7b\u578b\u6027\u80fd\u4f4e\uff0c\u6240\u4ee5\u5982\u679c\u4e24\u79cd\u7c7b\u578b\u90fd\u80fd\u6ee1\u8db3\u9700\u6c42\uff0c\u5efa\u8bae\u4f7f\u7528\u6574\u6570\u7c7b\u578b\u3002 \u6700\u540e\uff1a\u4e3a\u4e86\u589e\u5f3a\u7a0b\u5e8f\u7684\u79fb\u690d\u6027\uff0c\u6700\u597d\u540c\u65f6\u6307\u5b9anumeric\u7684\u7cbe\u5ea6\u548c\u6807\u5ea6\u3002<\/p><\/blockquote>\n
\u6d6e\u70b9\u7c7b\u578b<\/h4>\n
\u6570\u636e\u7c7b\u578breal\u548cdouble precision\u662f\u6307\u6d6e\u70b9\u6570\u636e\u7c7b\u578b(\u4e0d\u51c6\u786e\u7684\u3001\u53d8\u7cbe\u5ea6\u7684\u6570\u5b57\u7c7b\u578b),real\u652f\u63014\u5b57\u8282\uff0cdouble precision\u662f\u652f\u63018\u5b57\u8282\u3002<\/p>\n
\u5e8f\u5217\u53f7\u7c7b\u578b\uff08\u5b98\u65b9\u6587\u6863–>\u5e8f\u6570\u7c7b\u578b\uff09<\/h4>\n
smallserial\u3001serial\u548cbigserial\u662f\u81ea\u589e\u7c7b\u578b\uff0c\u4f46\u4e25\u683c\u610f\u4e49\u4e0a\u5b83\u4e0d\u662f\u771f\u6b63\u7684\u7c7b\u578b\uff0c\u5b83\u4eec\u53ea\u662f\u4e3a\u4e86\u521b\u5efa\u552f\u4e00\u6807\u8bc6\u7b26\u5217\u800c\u5b58\u5728\u7684\u65b9\u4fbf\u7b26\u53f7\uff08\u7c7b\u4f3c\u5176\u5b83\u4e00\u4e9b\u6570\u636e\u5e93\u4e2d\u652f\u6301\u7684AUTO_INCREMENT\u5c5e\u6027\uff09\uff0c\u5982\u4e0b\u4ee3\u7801:<\/p>\n
CREATE TABLE test_serial (\r\n    id serial,\r\n    flag text\r\n);\r\n<\/pre>\n
\u7b49\u4ef7\u4e8e\u4ee5\u4e0b\u8bed\u53e5\uff1a<\/p>\n
CREATE SEQUENCE test_serial_seq;\r\nCREATE TABLE test_serial (\r\n    id integer NOT NULL DEFAULT,\r\n    flag text\r\n    nextval('test_serial_seq')\r\n);\r\nALTER SEQUENCE test_serial_seq OWNED BY test_serial.id;<\/pre>\n
\u7b80\u5355\u7684\u8bf4\uff0c\u5c31\u662fmysql\u81ea\u589e(AUTO_INCREMENT).<\/p>\n
PS:<\/p>\n
\u7c7b\u578b\u540dserial\u548cserial4\u662f\u7b49\u6548\u7684, \u4e24\u4e2a\u90fd\u521b\u5efainteger\u5217\u3002<\/p>\n
\u7c7b\u578b\u540dbigserial\u548cserial8\u4e5f\u4e00\u6837\uff0c\u53ea\u4e0d\u8fc7\u5b83\u4eec\u521b\u5efa\u4e00\u4e2a bigint\u5217\u3002<\/p>\n
\u7c7b\u578b\u540dsmallserial\u548cserial2\u4e5f\u4ee5\u76f8\u540c\u65b9\u5f0f\u5de5\u4f5c\uff0c\u53ea\u4e0d\u8fc7\u5b83\u4eec\u521b\u5efa\u4e00\u4e2asmallint\u5217\u3002<\/p><\/blockquote>\n
\n
\u5b57\u7b26\u7c7b\u578b<\/h3>\n
\u5b57\u7b26\u4e32\u7c7b\u578b\u56fe\uff0c\u5982\u4e0b\uff1a<\/p>\n
<\/div><\/p>\n
character varying(n)\u5b58\u50a8\u7684\u662f\u53d8\u957f\u5b57\u7b26\u7c7b\u578b\uff0c \u5176\u4e2dn\u662f\u4e00\u4e2a\u6b63\u6574\u6570\uff0c\u5982\u679c\u5b58\u50a8\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\u8d85\u8fc7n\u4f1a\u62a5\u9519\u5594,\u4f46\u662f\u5982\u679c\u5b58\u50a8\u5b57\u7b26\u4e32\u6bd4n\u5c0f\u7684\u8bdd\uff0ccharacter varying(n)\u53ea\u4f1a\u5b58\u50a8\u5b9e\u9645\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
character(n)\u5b58\u50a8\u7684\u662f\u5b9a\u957f\u5b57\u7b26\u4e32\uff0c\u5982\u679c\u5b58\u50a8\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\u8d85\u8fc7n\u4f1a\u62a5\u9519\uff0c\u6bd4\u5b83\u5c0f\u5219\u4f1a\u7528\u7a7a\u767d\u586b\u5145…<\/p>\n
\u8bf4\u4e86\u90a3\u4e48\u591a\uff0c\u8fd8\u662f\u7528\u4e00\u4e2a\u4f8b\u5b50\u5427\uff1a<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u8868\r\ncreate table test_char(col1 varchar(4),col2 char(4));\r\n---\r\n\u63d2\u5165\u6570\u636e\r\ninsert into test_char(col1,col2) values('a','a');\r\n---\r\n\u6bd4\u8f83\u5b57\u7b26\u4e32\u957f\u5ea6\r\nselect char_length(col1),char_length(col2) from test_char;\r\n----\r\nchar_length\tchar_length1\r\n1\t1\r\n----\r\n\u6bd4\u8f83\u5b57\u7b26\u4e32\u5360\u7528\u7684\u5b57\u8282\u6570\r\nselect octet_length(col1),octet_length(col2) from test_char\r\n----\r\noctet_length\toctet_length1\r\n1\t4<\/pre>\n
S:<\/p>\n
varchar(n)\u548cchar(n)\u7684\u6982\u5ff5\u5206\u522b\u662fcharacter varying(n)\u548ccharacter(n)\u7684\u522b\u540d\u3002\u6ca1\u6709\u957f\u5ea6\u58f0\u660e\u8bcd\u7684character\u7b49\u6548\u4e8echaracter(1)\u3002\u5982\u679c\u4e0d\u5e26\u957f\u5ea6\u8bf4\u660e\u8bcd\u4f7f\u7528character varying\uff0c\u90a3\u4e48\u8be5\u7c7b\u578b\u63a5\u53d7\u4efb\u4f55\u957f\u5ea6\u7684\u4e32\u3002\u540e\u8005\u662f\u4e00\u4e2aPostgreSQL\u7684\u6269\u5c55\u3002<\/p><\/blockquote>\n
text\u5b57\u7b26\u7c7b\u578b\uff0c\u5b83\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u957f\u5ea6\u7684\u4e32\u3002\u548c\u6ca1\u6709\u4ec0\u4e48\u5b57\u7b26\u957f\u5ea6\u7684character varying(n)\u5b57\u7b26\u7c7b\u578b\u51e0\u4e4e\u6ca1\u6709\u5dee\u522b\u3002<\/p>\n
PS:<\/p>\n
\u8fd9\u4e09\u79cd\u7c7b\u578b\u4e4b\u95f4\u6ca1\u6709\u6027\u80fd\u5dee\u522b\uff0c\u53ea\u4e0d\u8fc7\u662f\u5728\u4f7f\u7528\u586b\u5145\u7a7a\u767d\u7684\u7c7b\u578b\u7684\u65f6\u5019\u9700\u8981\u66f4\u591a\u5b58\u50a8\u5c3a\u5bf8\uff0c\u4ee5\u53ca\u5728\u5b58\u50a8\u5230\u4e00\u4e2a\u6709\u957f\u5ea6\u7ea6\u675f\u7684\u5217\u65f6\u9700\u8981\u5c11\u91cf\u989d\u5916CPU\u5468\u671f\u6765\u68c0\u67e5\u957f\u5ea6\u3002\u867d\u7136\u5728\u67d0\u4e9b\u5176\u5b83\u7684\u6570\u636e\u5e93\u7cfb\u7edf\u91cc\uff0ccharacter(n)\u6709\u4e00\u5b9a\u7684\u6027\u80fd\u4f18\u52bf\uff0c\u4f46\u5728PostgreSQL\u91cc\u6ca1\u6709\u3002\u4e8b\u5b9e\u4e0a\uff0ccharacter(n)\u901a\u5e38\u662f\u8fd9\u4e09\u79cd\u7c7b\u578b\u4e4b\u4e2d\u6700\u6162\u7684\u4e00\u4e2a\uff0c\u56e0\u4e3a\u5b83\u9700\u8981\u989d\u5916\u7684\u5b58\u50a8\u5f00\u9500\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5e94\u8be5\u4f7f\u7528text\u6216\u8005character varying.\uff08postgreSQL\u652f\u6301\u5b57\u7b26\u4e32\u5b58\u50a8\u7684\u6700\u957f\u5b57\u4e32\u5927\u6982\u662f 1 GB\uff09<\/p><\/blockquote>\n
\n
\u65e5\u671f\/\u65f6\u95f4\u7c7b\u578b<\/h3>\n
PostgreSQL \u652f\u6301 SQL\u6807\u51c6\u4e2d\u6240\u6709\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7c7b\u578b\u3002 \u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n
<\/div><\/p>\n
PS:<\/p>\n
SQL\u8981\u6c42\u53ea\u5199timestamp\u7b49\u6548\u4e8etimestamp without time zone\uff0c\u5e76\u4e14PostgreSQL\u9f13\u52b1\u8fd9\u79cd\u884c\u4e3a\u3002timestamptz\u88ab\u63a5\u53d7\u4e3atimestamp with time zone\u7684\u4e00\u79cd\u7b80\u5199\uff0c\u8fd9\u662f\u4e00\u79cdPostgreSQL\u7684\u6269\u5c55<\/p><\/blockquote>\n
time\u3001timestamp\u548cinterval\u63a5\u53d7\u4e00\u4e2a\u53ef\u9009\u7684\u7cbe\u5ea6\u503c p\uff0c\u8fd9\u4e2a\u7cbe\u5ea6\u503c\u58f0\u660e\u5728\u79d2\u57df\u4e2d\u5c0f\u6570\u70b9\u4e4b\u540e\u4fdd\u7559\u7684\u4f4d\u6570\u3002\u7f3a\u7701\u60c5\u51b5\u4e0b\uff0c\u5728\u7cbe\u5ea6\u4e0a\u6ca1\u6709\u660e\u786e\u7684\u8fb9\u754c\uff0cp\u5141\u8bb8\u7684\u8303\u56f4\u662f\u4ece 0 \u5230 6\u3002<\/p>\n
\u8bf4\u4e86\u90a3\u4e48\u591a\uff0c\u6211\u4eec\u8fd8\u662f\u7528\u5b9e\u4f8b\u8bf4\u8bdd\u5427… \u9996\u5148\u5148\u7528\u7cfb\u7edf\u81ea\u5e26\u7684now()\u51fd\u6570\uff0cnow()\u51fd\u6570\u663e\u793a\u662f\u5f53\u524d\u65f6\u95f4\uff0c\u5e76\u8fd4\u56de\u7c7b\u578b\u4e3a\uff1atimestamp with time zone,\u5982\uff1a<\/p>\n
select now();\r\n---\r\nnow\r\n2019-10-20 00:23:25.288484+08<\/pre>\n
\u5982\u679c\u9700\u8981\u8f6c\u5230timestamp without time zone,\u5e76\u4e14\u4e0d\u9700\u8981\u4fdd\u7559\u5c0f\u6570\u70b9\uff0c\u5982<\/p>\n
select now()::timestamp(0) without time zone;\r\n----\r\nnow\r\n2019-10-20 00:24:42<\/pre>\n
\u8f6c\u6362\u5230date\u7c7b\u578b\uff0c\u5982\uff1a<\/p>\n
select now()::date;\r\n----\r\nnow\r\n2019-10-20<\/pre>\n
\u8f6c\u5230time without time zone\uff0c\u5982\uff1a<\/p>\n
select now()::time without time zone;\r\n----\r\nnow\r\n00:26:33.661496<\/pre>\n
\u6700\u540e\u5c31\u662finterval\u7c7b\u578b\uff0c\u5176\u5b9einterval\u7c7b\u578b\u662f\u6709\u4e00\u4e2a\u9644\u52a0\u9009\u9879\uff0c\u5b83\u53ef\u4ee5\u901a\u8fc7\u5199\u4e0b\u9762\u4e4b\u4e00\u7684\u77ed\u8bed\u6765\u9650\u5236\u5b58\u50a8\u7684fields\u7684\u96c6\u5408\uff1a<\/p>\n
year,month,day,hour,minute,second,yeartomonth,daytohour,daytominute,daytosecond,hourtominute,hourtosecond,minutetosecond<\/p><\/blockquote>\n
\u53c8\u6765\u4e3e\u4e2a\u4f8b\u5b50\u5427\uff1a<\/p>\n
select now(),now()+interval '1 day'\r\n----\r\nnow\t?column?\r\n2019-10-20 00:29:49.530872+08\t2019-10-21 00:29:49.530872+08<\/pre>\n
\u5269\u4e0b\u90a3\u4e48\u591a\u9644\u52a0\u9009\u9879\uff0c\u81ea\u5df1\u6d4b\u5427…<\/p>\n
\n
\u5e03\u5c14\u7c7b\u578b(boolean–>true\/false)<\/h3>\n
\u201c\u771f(true)\u201d\u72b6\u6001\u7684\u6709\u6548\u6587\u5b57\u503c\u662f:<\/p>\n
TRUE\u3001’t’\u3001’true’\u3001’y’\u3001’yes’\u3001’on’\u3001’1′<\/p><\/blockquote>\n
\u800c\u5bf9\u4e8e\u201c\u5047\u201d\u72b6\u6001\u6709\u6548\u6587\u5b57\u503c\u662f:<\/p>\n
FALSE\u3001’f’\u3001’false’\u3001’n’\u3001’no’\u3001’off’\u3001’0′<\/p><\/blockquote>\n
\u77e5\u9053\u6211\u4eec\u7684\u901a\u75c5\u90fd\u4e0d\u559c\u6b22\u770b\u6587\u5b57\uff0c\u800c\u770b\u4f8b\u5b50\uff0c\u5982\uff1a<\/p>\n
create table test_boolean(col1 boolean,col2 boolean);\r\n----\r\ninsert into test_boolean(col1,col2) values('true','false');\r\n\r\ninsert into test_boolean(col1,col2) values('true','false');\r\n\r\ninsert into test_boolean(col1,col2) values('t','f');\r\n\r\ninsert into test_boolean(col1,col2) values('TRUE','FALSE');\r\n\r\ninsert into test_boolean(col1,col2) values('yes','no');\r\n\r\ninsert into test_boolean(col1,col2) values('y','n');\r\n\r\ninsert into test_boolean(col1,col2) values('1','0');\r\n\r\ninsert into test_boolean(col1,col2) values(null,null);\r\n\r\n---------\r\n\r\nselect * from test_boolean\r\n----\r\ncol1\tcol2\r\nt\tf\r\nt\tf\r\nt\tf\r\nt\tf\r\nt\tf\r\nt\tf\r\n\t\r\nps:\u4e00\u5171\u67097\u6761\u6570\u636e\uff0c\u5176\u4e2d\u5e03\u5c14\u7c7b\u578b\u53ef\u4ee5\u652f\u6301\u63d2\u5165null\u5b57\u7b26...<\/pre>\n
\u7f51\u7edc\u5730\u5740\u7c7b\u578b<\/h3>\n
PostgreSQL\u63d0\u4f9b\u7528\u4e8e\u5b58\u50a8 IPv4\u3001IPv6 \u548c MAC \u5730\u5740\u7684\u6570\u636e\u7c7b\u578b,\u4f7f\u7528\u7f51\u7edc\u5730\u5740\u7c7b\u578b\u5b58\u50a8IP\u5730\u5740\u4f1a\u4f18\u4e8e\u5b57\u7b26\u7c7b\u578b\uff0c\u56e0\u4e3a\u7f51\u7edc\u5730\u5740\u7c7b\u578b\u4e00\u65b9\u9762\u4f1a\u5bf9\u6570\u636e\u5408\u6cd5\u6027\u8fdb\u884c\u68c0\u67e5\uff0c\u53e6\u4e00\u65b9\u9762\u4e5f\u63d0\u4f9b\u4e86\u7f51\u7edc\u5730\u5740\u7c7b\u578b\u76f8\u5173\u7684\u51fd\u6570\uff0c\u65b9\u4fbf\u6211\u4eec\u4f7f\u7528\u5427..<\/p>\n
\u7f51\u7edc\u5730\u5740\u6570\u636e\u7c7b\u578b\uff0c\u5982\u4e0b\uff1a<\/p>\n
<\/div><\/p>\n
inet\u6216\u8005cidr\u7c7b\u578b\u5b58\u50a8\u7684\u7f51\u7edc\u5730\u5740\u683c\u5f0f\u90fd\u4e3a\uff1aaddress(\u5730\u5740)\/y(\u7f51\u7edc\u63a9\u7801\u7684\u4f4d\u6570)<\/p>\n
address\u5c31\u662f\u8868\u793aipv4\u6216\u8005ipv6\u7684\u7f51\u7edc\u5730\u5740 y\u8868\u793a\u7f51\u7edc\u63a9\u7801\u4f4d\u6570\uff0c\u5982\u679cy\u7701\u7565\uff0c\u5219\u5bf9\u4e8eipv4\u7684\u7f51\u7edc\u63a9\u7801\u5c31\u4e3a32\uff0c\u800cipv6\u5219\u4e3a128,\u56e0\u6b64\u8be5\u503c\u8868\u793a\u53ea\u6709\u4e00\u53f0\u4e3b\u673a\u3002<\/p>\n
\u5982\u679cy\u663e\u793a\u65f6\uff0c\u5982\u679cy\u90e8\u5206\u6307\u5b9a\u4e00\u4e2a\u5355\u53f0\u4e3b\u673a\uff0c\u5b83\u5c06\u4e0d\u4f1a\u88ab\u663e\u793a\u51fa\u6765\u3002<\/p>\n
\u4e4b\u524d\u8bf4\u4e86inet\u6216\u8005cidr\u7c7b\u578b\u90fd\u4f1a\u5bf9\u6570\u636e\u5408\u6cd5\u6027\u8fdb\u884c\u68c0\u67e5\uff0c\u5982\u679c\u6570\u636e\u4e0d\u5408\u6cd5\u5219\u4f1a\u62a5\u9519\uff0c\u5982\uff1a<\/p>\n
[SQL]select '192.168.1.1000'::inet\r\n\r\n[Err] ERROR:  invalid input syntax for type inet: \"192.168.1.1000\"\r\nLINE 1: select '192.168.1.1000'::inet<\/pre>\n
inet\u548ccidr\u7f51\u7edc\u7c7b\u578b\u4e5f\u5b58\u5728\u4e00\u5b9a\u7684\u5dee\u522b\u54d2\u3002<\/p>\n
1.cidr\u7c7b\u578b\u7684\u8f93\u51fa\u9ed8\u8ba4\u5e26\u5b50\u7f51\u63a9\u7801\u4fe1\u606f\uff0c\u800cinte\u4e0d\u4e00\u5b9a\u3002\u5982\uff1a<\/p>\n
select '192.168.1.100'::cidr,'192.168.1.100'::inet\r\n---\r\ncidr\tinet\r\n192.168.1.100\/32\t192.168.1.100\r\n---------\r\nselect '192.168.1.100\/32'::cidr,'192.168.1.100\/32'::inet\r\n---\r\ncidr\tinet\r\n192.168.1.100\/32\t192.168.1.100\r\n--------\r\nselect '192.168.1.100'::cidr,'192.168.1.100\/16'::inet\r\n---\r\ncidr\tinet\r\n192.168.1.100\/32\t192.168.1.100\/16<\/pre>\n
2.cidr\u7c7b\u578b\u5bf9ip\u5730\u5740\u548c\u5b50\u7f51\u63a9\u7801\u5408\u6cd5\u6027\u8fdb\u884c\u68c0\u67e5\uff0c\u800cinte\u4e0d\u4f1a\uff0c\u5982\uff1a<\/p>\n
[SQL]select '192.168.1.100\/8'::cidr\r\n\r\n[Err] ERROR:  invalid cidr value: \"192.168.1.100\/8\"\r\nLINE 1: select '192.168.1.100\/8'::cidr\r\n               ^\r\nDETAIL:  Value has bits set to right of mask.\r\n\r\n--------------------\r\n\r\nselect '192.168.1.100\/8'::inet\r\n----\r\ninet\r\n192.168.1.100\/8<\/pre>\n
\u4ece\u4e0a\u9762\u7684\u4f8b\u5b50\u770b\u51fa\uff0ccidr\u6bd4inet\u7f51\u7edc\u7c7b\u578b\u66f4\u52a0\u5f97\u4e25\u8c28\u5427… \u7b80\u5355\u7684\u8bf4\u5c31\u662f\uff1a<\/p>\n
inet\u548ccidr\u7c7b\u578b\u4e4b\u95f4\u7684\u672c\u8d28\u533a\u522b\u662finet\u63a5\u53d7\u53f3\u8fb9\u6709\u975e\u96f6\u4f4d\u7684\u7f51\u7edc\u63a9\u7801\uff0c \u800ccidr\u4e0d\u63a5\u53d7\u3002 \u4f8b\u5982\uff0c192.168.1.100\/24\u5bf9inet\u6765\u8bf4\u662f\u6709\u6548\u7684\uff0c \u4f46\u662fcidr\u6765\u8bf4\u662f\u65e0\u6548\u7684\u3002<\/p><\/blockquote>\n
<\/div><\/p>\n
\u987a\u4fbf\u8bb0\u5f55\u4e00\u4e0b\u7f51\u7edc\u64cd\u4f5c\u7b26\u5427\uff0c\u56e0\u4e3aoracle\u548cmysql\u6211\u81ea\u5df1\u4e5f\u6ca1\u6709\u7528\u5230\u8fc7\u7f51\u7edc\u7c7b\u578b\u7684\u3002<\/p>\n
<\/div><\/p>\n
macaddr\u548cmacaddr8<\/h5>\n
macaddr\u548cmacaddr8\u662f\u5b58\u50a8mac\u5730\u5740\u3002\u5bf9\u4e8emac\u7684\u4ecb\u7ecd\u66f4\u591a\u53ef\u5230\uff1ahttp:\/\/www.postgres.cn\/docs\/10\/datatype-net-types.html<\/a><\/p>\n
\n
\u6570\u7ec4\u7c7b\u578b<\/h3>\n
postgreSQL\u652f\u6301\u4e00\u7ef4\u6570\u636eor\u591a\u7ef4\u6570\u7ec4\uff0c\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u4e3a\u6570\u5b57\u7c7b\u578b\u7684\u6570\u7ec4\u548c\u5b57\u7b26\u4e32\u7684\u6570\u636e\uff0c\u4f46\u4e5f\u652f\u6301\u5176\u4ed6\u7c7b\u578b\u7684\u5427?\u679a\u4e3e\u7c7b\u578b\u3001\u590d\u5408\u7c7b\u578b\u6570\u7ec4…\u600e\u4e48\u652f\u6301\u81ea\u5df1\u53bb\u5168\u7403\u6700\u5927\u7684\u540c\u6027\u604b\u4ea4\u53cb\u7f51\u7ad9\u770b\u5b98\u7f51\u624b\u518c..(github.com<\/a>)<\/p>\n
\u600e\u4e48\u7528\u6570\u7ec4\u7c7b\u578b?\u5657,\u5f00\u73a9\u7b11\u6211\u4e5f\u4e0d\u4f1a… \u90a3\u4e48\u6211\u4eec\u5c31\u4ece\u600e\u4e48\u521b\u5efa\u8868\u5f00\u59cb\u5427..\u5982\uff1a<\/p>\n
create table test_array(\r\nid INTEGER,\r\narray_i INTEGER[],\r\narrat_t TEXT[]\r\n);<\/pre>\n
\u4ece\u521b\u8868\u8bed\u53e5\u770b\uff0cINTEGER[]\u5c31\u662fInteger\u7c7b\u578b\u7684\u4e00\u7ef4\u6570\u7ec4\u4e86\uff0c\u540c\u6837\uff0cTEXT[]\u5c31\u662ftext\u7c7b\u578b\u7684\u4e00\u7ef4\u6570\u636e. \u4ec0\u4e48?\u90a3\u4e48\u4e8c\u7ef4\u6570\u7ec4\u5462???\u55b5\u55b5\u55b5???\u4e0d\u5c31\u662f:<\/p>\n
create table test_array_er(\r\nid INTEGER,\r\narray_i INTEGER[][],\r\narrat_t TEXT[][]\r\n);<\/pre>\n
\u6570\u7ec4\u7c7b\u578b\u63d2\u5165\u6570\u636e\u6709\u4e24\u79cd\u65b9\u5f0f\uff0c\u4e00\u79cd\u65b9\u5f0f\u4f7f\u7528\u82b1\u62ec\u53f7\u7684\u65b9\u5f0f\uff0c\u5373\uff1a{}–>:<\/p>\n
'{val1 delim val2 delim ...}'<\/pre>\n
\u8bf4\u767d\u4e86\uff0c\u5c31\u662f\u5c06\u6570\u7ec4\u5143\u7d20\u503c\u7528\u82b1\u62ec\u53f7\u201c{}\u201d\u5305\u56f4\u5e76\u7528delim\u5206\u9694\u7b26\u5206\u5f00\uff0cdelim\u5206\u9694\u7b26\u5e38\u7528\u57fa\u672c\u4e0a\u4e3a\u9017\u53f7?\u5982\uff1a<\/p>\n
select '{1,2,3}'\r\n----\r\n?column?\r\n{1,2,3}\r\n<\/pre>\n
\u5f80\u8868test_array \u63d2\u5165\u4e00\u6761\u6570\u636e\uff1a<\/p>\n
insert into test_array(id,array_i,arrat_t)\r\nvalues (1,'{1,2,3}','{\"a\",\"b\",\"c\"}');<\/pre>\n
\u5f80\u6570\u7ec4\u63d2\u5165\u7684\u7b2c\u4e8c\u5f20\u65b9\u5f0f\u4e3a\u4f7f\u7528array\u5173\u952e\u5b57\uff0c\u5982\uff1a<\/p>\n
select array[1,2,3]\r\n----\r\narray\r\n{1,2,3}<\/pre>\n
\u5f80\u8868test_array \u63d2\u5165\u4e00\u6761\u6570\u7ec4\uff1a<\/p>\n
insert into test_array(id,array_i,arrat_t)\r\nvalues (2,array[1,2,3],array['a','b','c']);<\/pre>\n
\u540c\u7406\uff0c\u5982\u679c\u63d2\u5165\u591a\u7ef4\u6570\u7ec4\u8868\uff0c\u5982\uff1a<\/p>\n
insert into test_array_er(id,array_i,arrat_t)\r\nvalues (1,'{{1,2,3},{4,5,6}}','{{\"a\",\"b\",\"c\"},{\"e\",\"f\",\"g\"}}');\r\n----\r\ninsert into test_array_er(id,array_i,arrat_t)\r\nvalues (2,array[[1,2,3],[4,5,6]],array[['a','b','c'],['e','f','g']]);<\/pre>\n
\u67e5\u8be2\u6570\u7ec4\u5143\u7d20<\/h5>\n
\u5982\u679c\u8981\u67e5\u8be2\u6570\u7ec4\u6240\u6709\u5143\u7d20\u503c\uff0c\u53ea\u9700\u8981\u67e5\u8be2\u6570\u7ec4\u5b57\u6bb5\u540d\u79f0\u5373\u53ef\uff0c\u5982\uff1a<\/p>\n
select array_i from test_array<\/pre>\n
\u6570\u7ec4\u5143\u7d20\u7684\u5f15\u7528\u53ef\u4ee5\u901a\u8fc7\u65b9\u62ec\u53f7[]\u65b9\u5f0f\uff0c\u6570\u636e\u4e0b\u8868\u5378\u8f7d\u65b9\u62ec\u53f7\u91cc\u9762\uff0c\u8303\u56f4\u57fa\u672c\u4e0a\u662f1\u5230n\uff0cn\u4e3a\u6570\u7ec4\u957f\u5ea6\uff0c\u8d85\u51fa\u6570\u636e\u8303\u56f4\u8fd4\u56denull\uff0c\u5982\uff1a<\/p>\n
select array_i[1],arrat_t[1] from test_array<\/pre>\n
\u6570\u7ec4\u5143\u7d20\u8ffd\u52a0\u3001\u5220\u9664\u3001\u66f4\u65b0<\/h4>\n
\u6570\u7ec4\u5143\u7d20\u7684\u8ffd\u52a0\u4f7f\u7528array_append\u51fd\u6570\uff0c\u5982:<\/p>\n
array_append(anyarray,anyelement)<\/pre>\n
\u4f7f\u7528array_append\u51fd\u6570\u5411\u6570\u7ec4\u672b\u7aef\u8ffd\u52a0\u4e00\u4e2a\u5143\u7d20\uff0c\u5982\uff1a<\/p>\n
select array_append(array[1,2,3],4)\r\n----\r\narray_append\r\n{1,2,3,4}<\/pre>\n
\u4e5f\u53ef\u4ee5\u7528array_prepend\u51fd\u6570\uff0c\u5982\uff1a<\/p>\n
SELECT array_prepend(1, ARRAY[2,3]);\r\n----\r\narray_prepend\r\n{1,2,3}<\/pre>\n
\u66f4\u53ef\u4ee5\u7528array_cat\u51fd\u6570\uff0c\u5982\uff1a<\/p>\n
SELECT array_cat(ARRAY[1,2], ARRAY[3,4]);\r\n----\r\narray_cat\r\n{1,2,3,4}\r\n\r\n------------\r\nSELECT array_cat(ARRAY[[1,2],[3,4]], ARRAY[5,6]);\r\narray_cat\r\n---------------------\r\n {{1,2},{3,4},{5,6}}<\/pre>\n
array_prepend\u3001array_append\u6216array_cat\u8fd9\u4e09\u4e2a\u51fd\u6570\u533a\u522b\u5c31\u662f\u524d\u4e24\u4e2a\u51fd\u6570\u4ec5\u652f\u6301\u4e00\u7ef4\u6570\u7ec4\uff0c\u4f46array_cat\u652f\u6301\u591a\u7ef4\u6570\u7ec4\u3002<\/p>\n
\u6570\u636e\u5143\u7d20\u8ffd\u52a0\u5230\u6570\u7ec4\u4e5f\u53ef\u4ee5\u4f7f\u7528||\uff0c\u5982\uff1a<\/p>\n
select array[1,2,3]||4\r\n----\r\n?column?\r\n{1,2,3,4}<\/pre>\n
\u6570\u7ec4\u5143\u7d20\u7684\u5220\u9664\u662f\u4f7f\u7528array_remove\u51fd\u6570\uff0c\u5982:<\/p>\n
array_remove(anyarray,anyelement)<\/pre>\n
\u4f7f\u7528array_remove\u51fd\u6570\u5c06\u79fb\u9664\u6570\u7ec4\u4e2d\u7b49\u4e8e\u7ed9\u5b9a\u503c\u7684\u6240\u6709\u6570\u7ec4\u5143\u7d20\uff0c\u5982\uff1a<\/p>\n
select array[1,2,2,3],array_remove(array[1,2,2,3],2)\r\n----\r\narray\tarray_remove\r\n{1,2,2,3}\t{1,3}<\/pre>\n
\u4fee\u6539\u6570\u7ec4<\/h5>\n
1.\u4e00\u4e2a\u6570\u7ec4\u503c\u53ef\u4ee5\u88ab\u6574\u4e2a\u66ff\u6362\uff1a<\/p>\n
\u82b1\u62ec\u53f7\u7684\u8bed\u6cd5\u65b9\u5f0f\uff1a\r\nupdate test_array set array_i='{2,3,4}' where id =1\r\n----\r\n\u4f7f\u7528ARRAY\u8868\u8fbe\u5f0f\u8bed\u6cd5:\r\nupdate test_array set array_i=array[1,3,4] where id =1<\/pre>\n
2.\u53ef\u4ee5\u5728\u4e00\u4e2a\u5143\u7d20\u4e0a\u88ab\u66f4\u65b0\uff0c\u5982\uff1a<\/p>\n
update test_array set array_i[3] = 5 where id =1<\/pre>\n
\u6216\u8005\u662f\u4e8c\u7ef4\u6570\u7ec4\u7684\u5207\u7247\u66f4\u65b0\uff0c\u5982\uff1a<\/p>\n
update test_array_er set array_i[1:2] = array[[7,8,9],[8,9,10]] where id =1<\/pre>\n
\u6570\u7ec4\u5143\u7d20\u4e30\u5bcc\u7684\u64cd\u4f5c\u7b26\uff1a<\/p>\n
<\/div><\/p>\n
\u60f3\u8981\u66f4\u6df1\u5165\u4e86\u89e3\u6570\u7ec4\u7c7b\u578b\uff0c\u53ef\u5230\uff1ahttp:\/\/www.postgres.cn\/docs\/10\/arrays.html<\/a><\/p>\n
\n
json\/jsonb\u7c7b\u578b<\/h3>\n
json\u7c7b\u578b<\/h4>\n
\u5f00\u59cb\u6211\u4eec\u5148\u7528\u4e00\u4e2a\u7b80\u5355\u7684json\u4f8b\u5b50\u5f00\u542fjson\u7c7b\u578b\u7684\u4f7f\u7528\u5427~<\/p>\n
select '{\"a\":1,\"b\":2}'::json\r\n----\r\njson\r\n{\"a\":1,\"b\":2}<\/pre>\n
\u8fd9\u5c31\u662f\u5f3a\u8f6c\u7684\u4e00\u4e2a\u5c0f\u4f8b\u5b50\uff0c\u6211\u4eec\u8fd8\u662f\u521b\u4e00\u4e2a\u8868\u5427\uff0c\u5982\uff1a<\/p>\n
create table test_json(\r\nid serial primary key,\r\nname json\r\n);\r\ninsert into test_json(name) values('{\"col1\":1,\"col2\":\"glj\",\"col3\":\"male\"}');\r\ninsert into test_json(name) values('{\"col1\":2,\"col2\":\"hhm\",\"col3\":\"famale\"}');\r\nselect * from test_json;\r\n-----\r\nid\tname\r\n1\t{\"col1\":1,\"col2\":\"glj\",\"col3\":\"male\"}\r\n2\t{\"col1\":2,\"col2\":\"hhm\",\"col3\":\"famale\"}<\/pre>\n
\u67e5\u8be2json\u6570\u636e<\/h5>\n
\u901a\u8fc7\u2018->\u2019\u64cd\u4f5c\u7b26\u53ef\u4ee5\u67e5\u8be2json\u6570\u636e\u7684\u952e\u503c\uff0c\u5982\uff1a<\/p>\n
select name->'col2' from test_json\r\n----\r\n?column?\r\n\"glj\"\r\n\"hhm\"<\/pre>\n
\u5982\u679c\u60f3\u4ee5\u6587\u672c\u683c\u5f0f\u8fd4\u56dejson\u5b57\u6bb5\u7684\u952e\u503c\u53ef\u4ee5\u4f7f\u7528 \u2018->>\u2019\u64cd\u4f5c\u7b26\uff0c\u5982\uff1a<\/p>\n
select name->>'col2' from test_json\r\n----\r\n?column?\r\nglj\r\nhhm<\/pre>\n
jsonb\u952e\/\u503c\u5f97\u8ffd\u52a0\u3001\u5220\u9664\u3001\u66f4\u65b0<\/h5>\n
jsonb\u952e\/\u503c\u8ffd\u52a0\u53ef\u4ee5\u901a\u8fc7||\u64cd\u4f5c\u7b26\uff0c\u4f8b\u5982\u589e\u52a0sex\u7684\u952e\u503c\uff0c\u5982\uff1a<\/p>\n
select '{\"name\":\"glj\",\"age\":23}'::jsonb || '{\"sex\":\"male\"}'::jsonb\r\n----\r\n?column?\r\n{\"age\": 23, \"sex\": \"male\", \"name\": \"glj\"}\r\n<\/pre>\n
jsonb\u952e\/\u503c\u5220\u9664\u6709\u4e24\u79cd\u529e\u6cd5\uff0c\u4e00\u662f\u901a\u8fc7\u64cd\u4f5c\u7b26-\u5220\u9664\uff0c\u53e6\u4e00\u79cd\u662f\u901a\u8fc7\u64cd\u4f5c\u7b26 #- \u5220\u9664\u6307\u5b9a\u7684\u952e\/\u503c\uff0c \u9996\u5148\u5148\u901a\u8fc7\u64cd\u4f5c\u7b26- \u5220\u9664\u952e\/\u503c\uff0c\u5982\uff1a<\/p>\n
select '{\"name\":\"glj\",\"age\":23,\"sex\":\"male\"}'::jsonb - 'sex'\r\n----\r\n?column?\r\n{\"age\": 23, \"name\": \"glj\"}<\/pre>\n
\u518d\u901a\u8fc7\u64cd\u4f5c\u7b26 #- \u5220\u9664\u952e\/\u503c\uff0c\u4f46\u8fd9\u79cd\u65b9\u5f0f\u901a\u5e38\u7528\u4e8e\u5d4c\u5957json\u7684\u6570\u636e\u5220\u9664\u7684\uff0c\u5982\uff1a<\/p>\n
select \t'{\"name\":\"glj\",\"contact\":{\"phone\":\"123456779\",\"blogAddrUrl\":\"https:\/\/199604.com\"}}'::jsonb #- '{contact,phone}'\r\n------\r\n?column?\r\n{\"name\": \"glj\", \"contact\": {\"blogAddrUrl\": \"https:\/\/199604.com\"}}<\/pre>\n
\u65b9\u5f0f\u4e8c\uff1a\u5220\u9664contact\u4e2d\u4f4d\u7f6e1\u7684\u952e\/\u503c\uff0c\u5982\uff1a<\/p>\n
select \t'{\"name\":\"glj\",\"contact\":[\"0\",\"1\",\"2\",\"3\"]}'::jsonb #- '{contact,1}'\r\n-----\r\n?column?\r\n{\"name\": \"glj\", \"contact\": [\"0\", \"2\", \"3\"]}<\/pre>\n
jsonb\u952e\/\u503c\u66f4\u65b0\u4e5f\u6709\u4e24\u79cd\u529e\u6cd5\uff0c\u4e00\u79cd\u662f\u64cd\u4f5c\u7b26 ||\u7684\u65b9\u5f0f\uff0c\u5982\uff1a<\/p>\n
select '{\"name\":\"glj\",\"age\":22}'::jsonb || '{\"age\":23}'\r\n----\r\n?column?\r\n{\"age\": 24, \"name\": \"glj\"}<\/pre>\n
\u8fd9\u79cd\u65b9\u5f0f\u5176\u5b9e\u5c31\u662f\u4e4b\u524d\u7684\u7b14\u8bb0\uff0cjsonb\u7684\u7279\u70b9\u540e\u7eed\u4f1a\u8bf4\uff0c\u5c31\u662fjsonb\u4f1a\u5220\u9664\u91cd\u590d\u7684\u952e\uff0c\u4ec5\u4ec5\u4fdd\u7559\u6700\u540e\u4e00\u4e2a\u3002<\/p>\n
\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u662f\u901a\u8fc7jsonb_set\u51fd\u6570\uff0c\u8bed\u6cd5\uff1a<\/p>\n
jsonb_set(target jsonb, path text[], new_value jsonb[, create_missing boolean])<\/pre>\n
target \u6307\u7684\u662fjsonb\u6e90\u6570\u636e\uff0cpath \u6307\u7684\u662f\u8def\u5f84 new_value\u6307\u7684\u662f\u66f4\u65b0\u540e\u7684\u952e\u503c\uff0ccreate_missing\u5f53\u4e3atrue\u662f\uff0c\u8868\u793a\u952e\u4e0d\u5b58\u5728\u65f6\uff0c\u5219\u6dfb\u52a0\uff0c\u53cd\u4e4b\uff0c\u4e0d\u5b58\u5728\u5c31\u4e0d\u6dfb\u52a0\uff0c\u5982\uff1a<\/p>\n
select jsonb_set('{\"name\":\"glj\",\"age\":22}'::jsonb,'{age}','\"23\"'::jsonb,false)\r\n----\r\njsonb_set\r\n{\"age\": \"23\", \"name\": \"glj\"}<\/pre>\n
json\u548cjsonb\u7684\u5bf9\u6bd4\u5dee\u5f02<\/h5>\n
JSON \u6570\u636e\u7c7b\u578b\uff1ajson \u548c jsonb\uff0c\u5176\u5b9e\u4ed6\u4eec\u57fa\u672c\u4e0a\u4e00\u6837\u54d2\uff0c\u4e3b\u8981\u7684\u5b9e\u9645\u533a\u522b\u4e4b\u4e00\u662f\u6548\u7387\u3002\u56e0\u4e3ajson\u5b58\u50a8\u683c\u5f0f\u4e3a\u6587\u672c\uff0c\u800cjsonb\u5b58\u50a8\u683c\u5f0f\u4e3a\u4e8c\u8fdb\u5236\uff0c\u7531\u4e8e\u5b58\u50a8\u683c\u5f0f\u7684\u4e0d\u540c\u4f7f\u5f97\u4e24\u8005\u6570\u636e\u7c7b\u578b\u7684\u5904\u7406\u6548\u7387\u5c31\u4e0d\u592a\u4e00\u6837\u4e86\u5427~json\u7c7b\u578b\u4ee5\u6587\u672c\u5b58\u50a8\u5e76\u4e14\u5b58\u50a8\u7684\u5185\u5bb9\u548c\u8f93\u5165\u7684\u5185\u5bb9\u662f\u4e00\u6837\u7684\uff0c\u5f53\u8981\u68c0\u7d22json\u6570\u636e\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u91cd\u65b0\u89e3\u6790\uff0c\u800cjsonb\u4e0d\u9700\u8981\uff0c\u56e0\u4e3a\u5b83\u662f\u4e8c\u8fdb\u5236\u5f62\u5f0f\u5b58\u50a8\uff0c\u5df2\u7ecf\u89e3\u6790\u597d\u4e86\u6570\u636e\uff0c\u6240\u4ee5\u68c0\u7d22jsonb\u7684\u6570\u636e\u65f6\uff0c\u4e0d\u8981\u91cd\u65b0\u89e3\u6790\u5373\u53ef\u67e5\u627e\uff0c\u56e0\u6b64json\u5199\u5165\u6bd4jsonb\u5feb\uff0c\u800c\u68c0\u7d22\u65f6\u5019\u5c31\u76f8\u53cd\u4e86\u3002<\/p>\n
\u8bf4\u4e86\u90a3\u4e48\u591a\uff0c\u6211\u4eec\u7528\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u770b\u770b\u5427\uff0c\u4f8b\u5982\u5c31\u662fjsonb\u7684\u8f93\u51fa\u952e\u987a\u7545\u5c31\u548c\u8f93\u5165\u65f6\u5019\u4e0d\u4e00\u6837\uff0c\u5982\uff1a<\/p>\n
select '{\"name\":\"glj\",\"age\":23,\"sex\":\"male\"}'::jsonb,'{\"name\":\"glj\",\"age\":23,\"sex\":\"male\"}'::json\r\n------\r\njsonb\tjson\r\n{\"age\": 23, \"sex\": \"male\", \"name\": \"glj\"}\t{\"name\":\"glj\",\"age\":23,\"sex\":\"male\"}<\/pre>\n
\u4ece\u4e0a\u9762\u770b\u51fa\u6765\uff0cjson\u8f93\u5165\u548c\u8f93\u51fa\u987a\u5e8f\u662f\u4e00\u81f4\u7684\u3002 \u8fd8\u6709\uff0c\u5c31\u662fjsonb\u7c7b\u578b\u4f1a\u53bb\u6389\u8f93\u5165\u6570\u636e\u4e2d\u7684\u952e\u503c\u7a7a\u683c\uff0c\u800cjson\u5219\u4e0d\u4f1a\uff0c\u5982\uff1a<\/p>\n
select '{\"name\":\"glj\",        \"age\":23,\"sex\":\"male\"}'::jsonb,\r\n'{\"name\":\"glj\",       \"age\":23,\"sex\":\"male\"}'::json\r\n---------\r\njsonb\tjson\r\n{\"age\": 23, \"sex\": \"male\", \"name\": \"glj\"}\t{\"name\":\"glj\",       \"age\":23,\"sex\":\"male\"}<\/pre>\n
\u6700\u6700\u6700\u540e\uff0c\u5c31\u662fjsonb\u4f1a\u5220\u9664\u91cd\u590d\u7684\u952e\uff0c\u4ec5\u4ec5\u4fdd\u7559\u6700\u540e\u4e00\u4e2a\uff0c\u5982:<\/p>\n
select '{\"name\":\"glj\",\"age\":23,\"sex\":\"male\",\"name\":\"hhm\"}'::jsonb,\r\n'{\"name\":\"glj\",\"age\":23,\"sex\":\"male\",\"name\":\"hhm\"}'::json\r\n-----\r\njsonb\tjson\r\n{\"age\": 23, \"sex\": \"male\", \"name\": \"hhm\"}\t{\"name\":\"glj\",\"age\":23,\"sex\":\"male\",\"name\":\"hhm\"}<\/pre>\n
\u770b\u770b\u5427\uff0c\u4e0a\u9762\u7684name\u91cd\u590d\u4e86\uff0c\u4f46\u662fjsonb\u5b83\u662f\u4fdd\u7559\u4e86\u6700\u540e\u4e00\u4e2aname\u952e\u7684\u503c\uff0c\u800cjson\u9e21\u5df4\u6ca1\u6709\u8fd9\u4e2a\u6821\u9a8c\u7684\u89c4\u5219\uff0c\u5b83\u662f\u4f60\u8f93\u5165\u5565\u5b83\u5c31\u7ed9\u4f60\u8f93\u51fa\u5565..\u6240\u4ee5\u5efa\u8bae\u5c3d\u91cf\u4f7f\u7528jsonb\uff0c\u800c\u9664\u975e\u662f\u90a3\u79cd\u9e21\u5df4\u7279\u6b8a\u9700\u6c42\u9664\u5916\uff0c\u6bd4\u5982\u5c31\u662f\u5bf9json\u7684\u952e\u503c\u6709\u987a\u5e8f\u8981\u6c42\u7684..\uff08\u8fd9\u53e5\u8bdd\u8bf4\u5f97\u597d\u6ca1\u6709\u5e95\u6c14\uff0c\u56e0\u4e3a\u6211tm\u4e5f\u662f\u5c0f\u767d..\uff09<\/p>\n
jsonb\u548cjson\u64cd\u4f5c\u7b26<\/h4>\n
<\/div><\/p>\n
<\/div><\/p>\n
\u60f3\u8981\u66f4\u6df1\u5165\u4e86\u89e3json\/jsonb\u7c7b\u578b\uff0c\u53ef\u5230\uff1ahttp:\/\/www.postgres.cn\/docs\/10\/datatype-json.html<\/a><\/p>\n
\n
\u7801\u5b57\u633a\u8f9b\u82e6\u54d2~\u8981\u4e0d\u6253\u4e2a\u8d4f\u5427<\/p>\n
<\/div>
<\/div><\/p>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
\u4ee5\u4e0b\u662f\u81ea\u5df1\u7ed3\u5408postgreSQL\u6587\u6863\u624b\u518c\u603b\u7ed3\u6574\u7406\u7684\u5165\u95e8\u624b\u672d\uff0c\u5982\u6709\u4e0d\u4e25\u8c28\uff0c\u8bf7\u5230\u5b98\u65b9\u6587\u6863\u624b\u518c\u67e5\u770b\uff1ahttp:\/\/ […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[227,228,232],"class_list":["post-1353","post","type-post","status-publish","format-standard","hentry","category-2","tag-pgsql","tag-postgresql","tag-232"],"_links":{"self":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/1353","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/comments?post=1353"}],"version-history":[{"count":1,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/1353\/revisions"}],"predecessor-version":[{"id":1354,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/1353\/revisions\/1354"}],"wp:attachment":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/media?parent=1353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/categories?post=1353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/tags?post=1353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}