Display sum in last row of table using MySQL?

To display sum in last row of a table, you can use UNION. To understand how, let us create a table

mysql> create table showSumInLastRowDemo
   -> (
   -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> StudentName varchar(20),
   -> StudentMarks int
   -> );
Query OK, 0 rows affected (0.69 sec)

Insert some records in the table using insert command. The query is as follows −

mysql> insert into showSumInLastRowDemo(StudentName,StudentMarks) values('John',56);
Query OK, 1 row affected (0.14 sec)
mysql> insert into showSumInLastRowDemo(StudentName,StudentMarks) values('John',87);
Query OK, 1 row affected (0.10 sec)
mysql> insert into showSumInLastRowDemo(StudentName,StudentMarks) values('John',52);
Query OK, 1 row affected (0.17 sec)
mysql> insert into showSumInLastRowDemo(StudentName,StudentMarks) values('Carol',97);
Query OK, 1 row affected (0.12 sec)
mysql> insert into showSumInLastRowDemo(StudentName,StudentMarks) values('Larry',75);
Query OK, 1 row affected (0.14 sec)
mysql> insert into showSumInLastRowDemo(StudentName,StudentMarks) values('Larry',98);
Query OK, 1 row affected (0.10 sec)
mysql> insert into showSumInLastRowDemo(StudentName,StudentMarks) values('Carol',73);
Query OK, 1 row affected (0.14 sec)

Display all records from the table using select statement. The query is as follows −

mysql> select *from showSumInLastRowDemo;

The following is the output

+-----------+-------------+--------------+
| StudentId | StudentName | StudentMarks |
+-----------+-------------+--------------+
|         1 | John        |           56 |
|         2 | John        |           87 |
|         3 | John        |           52 |
|         4 | Carol       |           97 |
|         5 | Larry       |           75 |
|         6 | Larry       |           98 |
|         7 | Carol       |           73 |
+-----------+-------------+--------------+
7 rows in set (0.00 sec)

Here is the query to display sum in last row of table using MySQL

mysql> (select StudentName,StudentMarks from showSumInLastRowDemo)
   -> UNION
   -> (select 'TotalMarksOfAllStudent' as StudentName,sum(StudentMarks) StudentMarks from showSumInLastRowDemo);

The following is the output

+------------------------+--------------+
| StudentName            | StudentMarks |
+------------------------+--------------+
| John                   |           56 |
| John                   |           87 |
| John                   |           52 |
| Carol                  |           97 |
| Larry                  |           75 |
| Larry                  |           98 |
| Carol                  |           73 |
| TotalMarksOfAllStudent |          538 |
+------------------------+--------------+
8 rows in set (0.00 sec)