Is there such thing as a SELECT with an IF/ELSE statement in MySQL?

MySQLMySQLi Database

Yes, SELECT with an IF/ELSE is possible in MySQL.

Let us first create a table −

mysql> create table DemoTable721 (
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   FirstName varchar(100),
   Marks int,
   CountryName varchar(100)
);
Query OK, 0 rows affected (0.57 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable721(FirstName,Marks,CountryName) values('Chris',56,'US');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable721(FirstName,Marks,CountryName) values('Robert',78,'UK');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable721(FirstName,Marks,CountryName) values('Mike',45,'AUS');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable721(FirstName,Marks,CountryName) values('Carol',89,'ENG');
Query OK, 1 row affected (0.22 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable721;

This will produce the following output -

+----+-----------+-------+-------------+
| Id | FirstName | Marks | CountryName |
+----+-----------+-------+-------------+
| 1  | Chris     | 56    | US          |
| 2  | Robert    | 78    | UK          |
| 3  | Mike      | 45    | AUS         |
| 4  | Carol     | 89    | ENG         |
+----+-----------+-------+-------------+
4 rows in set (0.00 sec)

Following is the query to implement SELECT with an IF/ELSE statement in MySQL −

mysql> select FirstName,IF(Marks > 75,Marks,CountryName) from DemoTable721;

This will produce the following output -

+-----------+----------------------------------+
| FirstName | IF(Marks > 75,Marks,CountryName) |
+-----------+----------------------------------+
| Chris     | US                               |
| Robert    | 78                               |
| Mike      | AUS                              |
| Carol     | 89                               |
+-----------+----------------------------------+
4 rows in set (0.00 sec)
raja
Published on 22-Aug-2019 10:53:05
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