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Swap a specific column value in MySQL
Let us first create a table table −
mysql> create table DemoTable1504 -> ( -> Id int, -> FirstName varchar(20) -> ); Query OK, 0 rows affected (0.83 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1504 values(101,'Chris'); Query OK, 1 row affected (0.63 sec) mysql> insert into DemoTable1504 values(102,'Bob'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1504 values(103,'David'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1504 values(104,'Mike'); Query OK, 1 row affected (0.10 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1504 ;
This will produce the following output −
+------+-----------+ | Id | FirstName | +------+-----------+ | 101 | Chris | | 102 | Bob | | 103 | David | | 104 | Mike | +------+-----------+ 4 rows in set (0.00 sec)
Following is the query to swap a specific column value −
mysql> update DemoTable1504 -> set FirstName='Carol' -> where Id=103 -> and FirstName <> 'Carol'; Query OK, 1 row affected (0.13 sec) Rows matched: 1 Changed: 1 Warnings: 0
Let us check the table records once again−
mysql> select * from DemoTable1504;
This will produce the following output −
+------+-----------+ | Id | FirstName | +------+-----------+ | 101 | Chris | | 102 | Bob | | 103 | Carol | | 104 | Mike | +------+-----------+ 4 rows in set (0.00 sec)
Updated on: 11-Dec-2019
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