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Write MySQL case statement to set custom messages for student’s result
For this, set conditions using MySQL CASE statement −
mysql> create table DemoTable1916 ( StudentName varchar(20), StudentMarks int ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1916 values('Chris',59);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1916 values('David',89);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1916 values('Sam',94);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1916 values('Mike',75);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1916 values('Carol',69);
Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1916;
This will produce the following output −
+-------------+--------------+ | StudentName | StudentMarks | +-------------+--------------+ | Chris | 59 | | David | 89 | | Sam | 94 | | Mike | 75 | | Carol | 69 | +-------------+--------------+ 5 rows in set (0.00 sec)
Here is the query to set custom message for Student Marks −
mysql> select StudentName, case when StudentMarks > 70 Then 'Good Marks' else 'Not Good Marks' end as Result from DemoTable1916;
This will produce the following output −
+-------------+----------------+ | StudentName | Result | +-------------+----------------+ | Chris | Not Good Marks | | David | Good Marks | | Sam | Good Marks | | Mike | Good Marks | | Carol | Not Good Marks| +-------------+----------------+ 5 rows in set (0.00 sec)
Updated on: 30-Dec-2019
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