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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)
Updated on: 30-Jul-2019
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