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MySQL Articles
Page 262 of 355
MySQL query to update every alternative row string having same values?
Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Subject varchar(100) -> ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Subject) values('C'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable(Subject) values('Java'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(Subject) ...
Read MoreRemove seconds from MySQL Datetime?
To remove seconds from MySQL datetime, use UPDATE and SET as in the following syntax −update yourTableName set yourDateColumnName=yourDateColumnName -second(yourDateColumnName);Let us first create a table −mysql> create table DemoTable -> ( -> Shippingdatetime datetime -> ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-01-21 12:05:20'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values('2019-03-01 10:23:35'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('2019-06-09 11:00:56'); Query OK, 1 row affected (0.14 sec)Display all records from the table ...
Read MoreWhat is the PHP stripos() equivalent in MySQL?
The stripos() equivalent in MySQL is INSTR(), which returns the position of the first occurrence of a string in another string. Following is the syntax −select instr(yourColumnName, yourWord) As anyAliasName from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> Title text -> ); Query OK, 0 rows affected (1.22 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('MySQL is my favourite subject'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('MongoDB is not my favourite subject'); Query OK, 1 row affected (0.20 sec)Display ...
Read MoreHow to lowercase the entire string keeping the first letter in uppercase with MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (1.32 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('JOhn'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('CHRIS'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('DAVID'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('RObert'); Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+--------+ | Name ...
Read MoreOrder by on a specific number in MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> status int -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(30); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(30); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.14 sec) ...
Read MoreSELECT last entry without using LIMIT in MySQL?
For this, you can use subquery. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(100) -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name) values('John Smith'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Name) values('David Miller'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Name) values('Chris Brown'); Query OK, 1 row affected (0.22 sec)Display all records from the table using select statement −mysql> ...
Read MoreHow to perform string matching in MySQL?
For string matching, use LIKE operator. Let us first create a table −mysql> create table DemoTable -> ( -> MonthName varchar(100) -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('JFMA'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('JMA'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('JDN'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('JFOSA'); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement ...
Read MoreSum the values in a column in MySQL?
For this, use the aggregate function SUM(). Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> € int -> ); Query OK, 0 rows affected (0.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(€) values(10); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(€) values(200); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(€) values(190); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreMySQL query with OR & AND conditions
Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20), -> Age int -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Age) values('John', 21); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(Name, Age) values(Null, 20); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(Name, Age) values('David', 23); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(Name, Age) values('Carol', null); ...
Read MoreReturn the first n letters of a column in MySQL
To return the first n letters, use the LEFT() function. Following is the syntax −select left(yourColumnName, yourValue) from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> CourseTitle text -> ); Query OK, 0 rows affected (0.65 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(CourseTitle) values('Java with Spring and Hibernate framework'); Query OK, 1 row affected (0.43 sec) mysql> insert into DemoTable(CourseTitle) values('Python Web Development'); Query OK, 1 row affected (0.22 sec)Display all records from the table using ...
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