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Fix a specific column value and display random values for rest of the rows in MySQL
For random rows, you can use RAND(), whereas to fix a specific column, use ORDER BY clause. Let us create a table −
mysql> create table DemoTable1921 ( Number int ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1921 values(40); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1921 values(80); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1921 values(820); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1921 values(10); Query OK, 1 row affected (0.00 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1921;
This will produce the following output −
+--------+ | Number | +--------+ | 40 | | 80 | | 820 | | 10 | +--------+ 4 rows in set (0.00 sec)
Here is the query to fix a specific column value and display rest of the rows with random values −
mysql> select * from DemoTable1921 order by (Number=40)desc,rand();
This will produce the following output −
+--------+ | Number | +--------+ | 40 | | 820 | | 10 | | 80 | +--------+ 4 rows in set (0.00 sec)
Updated on: 30-Dec-2019
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