To order results of a query randomly, use ORDER BY RAND(). The syntax is as follows −select * from DemoTable1559 where yourColumnName IN(yourValue1, yourValue2, ....N) order by rand() limit yourLimitValue;Let us first create a table −mysql> create table DemoTable1559    -> (    -> EmployeeId int,    -> EmployeeName varchar(20),    -> EmployeeAge int    -> ); Query OK, 0 rows affected (1.22 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1559 values(101, 'Bob', 28); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1559 values(102, 'Robert', 26); Query OK, 1 row affected (0.16 sec) ... Read More

To re-format datetime in MySQL, you can use DATE_FORMAT(). MySQL gives in the format yyyy-mm-dd.Let us first create a table −mysql> create table DemoTable1558    -> (    -> EmployeeJoiningDate datetime    -> ); Query OK, 0 rows affected (1.10 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1558 values(CURDATE()); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1558 values(NOW()); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1558 values('2018-01-10'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1558 values('2017-12-31'); Query OK, 1 row affected (0.18 sec)Display all records from ... Read More

To shuffle elements, you need to use ORDER BY RAND(). Let us first create a table −mysql> create table DemoTable1557    -> (    -> SubjectId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> SubjectName varchar(20)    -> ); Query OK, 0 rows affected (0.91 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1557(SubjectName) values('MySQL'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1557(SubjectName) values('MongoDB'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1557(SubjectName) values('Java'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1557(SubjectName) values('C'); Query OK, 1 row affected ... Read More

Let us first create a table −mysql> create table DemoTable1    -> (    -> Id int,    -> FirstName varchar(20)    -> ); Query OK, 0 rows affected (0.52 sec)Here is the query to create second table −mysql> create table DemoTable2    -> (    -> EmployeeId int,    -> EmployeeName varchar(20)    -> ); Query OK, 0 rows affected (0.51 sec)Let us now create a trigger to update MySQL table on insert command −mysql>  DELIMITER // mysql>     CREATE TRIGGER updateDemoOnInsert    ->      AFTER INSERT ON DemoTable2    ->         FOR EACH ... Read More

Use FULLTEXT search to quickly search for a string. Let us first create a table −mysql> create table DemoTable1554    -> (    -> Title text    -> ); Query OK, 0 rows affected (0.63 sec)Here is the query to create full text search −mysql> create fulltext index faster_title on DemoTable1554(Title); Query OK, 0 rows affected, 1 warning (7.09 sec) Records: 0  Duplicates: 0  Warnings: 1Insert some records in the table using insert command −mysql> insert into DemoTable1554 values('John is working on MySQL database'); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable1554 values('Adam Smith is working on ... Read More

For this, you can use UNIQUE KEY. Let us first create a table −mysql> create table DemoTable1553    -> (    -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> EmployeeName varchar(20),    -> EmployeeSalary int    -> ); Query OK, 0 rows affected (0.47 sec)Here is the query to add unique key −mysql> alter table DemoTable1553 add unique(EmployeeSalary); Query OK, 0 rows affected (0.53 sec) Records: 0  Duplicates: 0  Warnings: 0Insert some records in the table using insert command −mysql> insert into DemoTable1553(EmployeeName, EmployeeSalary) values('Chris', 45000); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable1553(EmployeeName, EmployeeSalary) ... Read More

Use single quotes on string input value. If there is an identifier like table name or column name, then do not use single quotes (use backticks).Let us first create a table −mysql> create table DemoTable1552    -> (    -> `key` int,    -> Name varchar(20)    -> ); Query OK, 0 rows affected (0.82 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1552 values(101, 'Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1552 values(102, 'David'); Query OK, 1 row affected (0.28 sec) mysql> insert into DemoTable1552 values(103, 'Mike'); Query OK, 1 row ... Read More

Use FORMAT() in MySQL to display USD currency records in the correct form. Let us first create a table −mysql> create table DemoTable    -> (    -> Amount DECIMAL(15, 4)    -> ); Query OK, 0 rows affected (0.75 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(90948484); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(1000000000); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(1535353536); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(773646463); Query OK, 1 row affected (0.20 sec)Display all records from ... Read More

For this, you can use ORDER BY clause along with LIMIT. Let us first create a table −mysql> create table DemoTable1551    -> (    -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> EmployeeName varchar(20)    -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1551(EmployeeName) values('Chris'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable1551(EmployeeName) values('Robert'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1551(EmployeeName) values('Mike'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1551(EmployeeName) values('Sam'); Query OK, 1 row ... Read More

To search from a comma-separated column, use the FIND_IN_SET() method. Let us first create a table −mysql> create table DemoTable    -> (    -> Value varchar(20)    -> ); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('41, 14, 94'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('64, 84, 94'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('44, 74, 103, 104'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('904, 1004, 1444, 1544'); Query OK, 1 row ... Read More