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)
Published on 01-Apr-2019 12:20:49
