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IF() function in a MySQL Select statement?
The IF() function returns a value based on a condition.
The syntax is as follows−
SELECT IF(yourCondition, yourMessageIfConditionBecomesTrue,yourMessageIfConditionBecomesFalse) from yourTableName; Let us first create a table: mysql> create table DemoTable ( Value int ); Query OK, 0 rows affected (0.60 sec)
Insert records in the table using insert command −
mysql> insert into DemoTable values(1000); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(2000); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(500); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(1100); Query OK, 1 row affected (0.16 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-------+ | Value | +-------+ | 1000 | | 2000 | | 500 | | 1100 | +-------+ 4 rows in set (0.00 sec)
Here is the query to implement IF() in MySQL −
mysql> select Value,IF(Value > 1000, CONCAT(Value,' is greater than 1000'),CONCAT(Value,' is lower than 1000')) AS Result from DemoTable;
This will produce the following output−
+-------+---------------------------+ | Value | Result | +-------+---------------------------+ | 1000 | 1000 is lower than 1000 | | 2000 | 2000 is greater than 1000 | | 500 | 500 is lower than 1000 | | 1100 | 1100 is greater than 1000 | +-------+---------------------------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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