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MySQL Articles
Page 259 of 355
Convert the column to a case-sensitive collation in MySQL?
For this, you can use COLLATE. Following is the syntax −select *from yourTableName where yourColumnName LIKE yourValue COLLATE utf8_bin;Let us first create a table −mysql> create table DemoTable ( LastName varchar(100) ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Brown'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('BROWN'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable values('brown'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('BRoWN'); Query OK, 1 row affected (0.14 sec)Display all records ...
Read MoreMySQL query to alphabetize records and count the duplicates?
For this, use both GROUP BY and ORDER BY clause. Let us first create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentGrade char(1) ); Query OK, 0 rows affected (0.87 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentGrade) values('A'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(StudentGrade) values('F'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(StudentGrade) values('C'); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable(StudentGrade) values('A'); Query OK, 1 row affected (0.23 sec) mysql> insert ...
Read MoreResolve Syntax error near "ORDER BY order DESC" in MySQL?
The word order is a reserved order in MySQL and you have used it in the query. To get rid of the syntax error, you need to use backticks(` `) around the order.The correct syntax is as follows −select *from yourTableName ORDER BY `order` DESC;Let us first create a table −mysql> create table DemoTable ( `order` int ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(89); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values(67); Query OK, 1 row affected (0.13 sec) ...
Read MoreCan we update a row with the highest ID in a single MySQL query?
Yes, we can do that. Let us first create a table −mysql> create table DemoTable ( ID int, GameScore int ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(15, 848747); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(13, 909049); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(34, 98474646); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(31, 948474); Query OK, 1 row affected (0.27 sec)Display all records from the table using select statement ...
Read MoreMySQL select to count values equal to 0 and greater than 0 from a column?
For this, use the CASE statement. Let us first create a table −mysql> create table DemoTable ( Number int ); Query OK, 0 rows affected (0.83 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(0); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(50); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values(0); Query OK, 1 row affected (0.09 sec) mysql> insert ...
Read MoreSorted difference between two columns in MySQL?
Use ORDER BY clause for this. Let us first create a table −mysql> create table DemoTable ( Value1 int, Value2 int ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10, 40); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(50, 5); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(51, 56); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(52, 78); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(90, 7); Query ...
Read MoreGet MAX() on column in two MySQL tables?
Use GREATEST() to find the maximum. Let us first create a table −mysql> create table DemoTable1 ( Number int ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values(80); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable1 values(229); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1 values(575); Query OK, 1 row affected (0.24 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;Output+--------+ | Number | +--------+ | 80 | | 229 ...
Read MoreHow to check whether now() falls between two specific dates in MySQL?
Here, now() represents the current date. To check whether it falls between two specific dates, you need to use the BETWEEN. Let us first create a table −mysql> create table DemoTable ( FirstDate datetime, SecondDate datetime ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-04-01', '2019-05-02'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values('2019-05-28', '2019-06-04'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values('2016-01-31', '2019-03-01'); Query OK, 1 row affected (0.15 sec)Display all records from the table ...
Read MoreMySQL ORDER BY with different ordering for some of the values as descending and others ascending?
You can use the field() for this. Let us first create a table −mysql> create table DemoTable ( Value int ); Query OK, 0 rows affected (0.80 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(70); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(60); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(56); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(81); Query OK, 1 row affected (0.44 sec) mysql> ...
Read MoreCombining multiple rows into a comma delimited list in MySQL?
To combine multiple rows into a comma delimited list, use the GROUP_CONCAT() method. Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(30), Marks int ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Marks) values('John', 67); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable(Name, Marks) values('Carol', 69); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Name, Marks) values('Sam', 69); Query OK, 1 row affected (0.12 sec) mysql> insert ...
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