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Group the marks of a particular student from a table and display total marks in a separate column for each student?
To group marks, use MySQL GROUP BY. To sum, use MySQL sum()function. Let us first create a table −
mysql> create table DemoTable1920 ( 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 DemoTable1920 values('Chris',67);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1920 values('David',97);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1920 values('Chris',57);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1920 values('David',45);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1920 values('Chris',89);
Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1920;
This will produce the following output −
+-------------+--------------+ | StudentName | StudentMarks | +-------------+--------------+ | Chris | 67 | | David | 97 | | Chris | 57 | | David | 45 | | Chris | 89 | +-------------+--------------+ 5 rows in set (0.00 sec)
Here is the query to group marks of a particular student −
mysql> select StudentName,SUM(StudentMarks) as TotalMarks from DemoTable1920 group by StudentName;
This will produce the following output −
+-------------+------------+ | StudentName | TotalMarks | +-------------+------------+ | Chris | 213 | | David | 142 | +-------------+------------+ 2 rows in set (0.00 sec)
Updated on: 30-Dec-2019
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