How to use “OR” condition in MySQL CASE expression?

MySQLMySQLi Database

Set the same condition like “OR” in a MySQL CASE expression. Let us first create a sample table.

Following is the query

mysql> create table caseOrConditionDemo
   -> (
   -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> Name varchar(100),
   -> Score int
   -> );
Query OK, 0 rows affected (0.49 sec)

Following is the query to insert some records in the table using insert command:

mysql> insert into caseOrConditionDemo(Name,Score) values('Larry',85);
Query OK, 1 row affected (0.18 sec)

mysql> insert into caseOrConditionDemo(Name,Score) values('Sam',74);
Query OK, 1 row affected (0.20 sec)

mysql> insert into caseOrConditionDemo(Name,Score) values('Mike',76);
Query OK, 1 row affected (0.16 sec)

mysql> insert into caseOrConditionDemo(Name,Score) values('Carol',65);
Query OK, 1 row affected (0.20 sec)

Following is the query to display records from the table using select command:

mysql> select *from caseOrConditionDemo;

This will produce the following output

+----+-------+-------+
| Id | Name  | Score |
+----+-------+-------+
| 1  | Larry | 85    |
| 2  | Sam   | 74    |
| 3  | Mike  | 76    |
| 4  | Carol | 65    |
+----+-------+-------+
4 rows in set (0.00 sec)

Following is the query to use a condition like “OR” in MySQL CASE expression:

mysql> select Id,Name,Score,
   -> case when Score > 75 then 'Better Score'
   -> when Score > 70 then 'Good Score'
   -> else 'Not Good Score'
   -> end as 'Performance'
   -> from caseOrConditionDemo;

This will produce the following output

+----+-------+-------+----------------+
| Id | Name  | Score | Performance    |
+----+-------+-------+----------------+
| 1  | Larry | 85    | Better Score   |
| 2  | Sam   | 74    | Good Score     |
| 3  | Mike  | 76    | Better Score   |
| 4  | Carol | 65    | Not Good Score |
+----+-------+-------+----------------+
4 rows in set (0.04 sec)
raja
Published on 17-Apr-2019 16:42:57
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