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Get maximum age from records with similar student names in MySQL
For this, you can use GROUP BY along with aggregate function MAX(). Let us first create a table −
mysql> create table DemoTable1964 ( StudentName varchar(20), StudentAge int ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1964 values('Chris',23);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1964 values('David',34);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1964 values('Chris',27);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1964 values('Sam',31);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1964 values('David',32);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1964 values('David',37);
Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1964;
This will produce the following output −
+-------------+------------+ | StudentName | StudentAge | +-------------+------------+ | Chris | 23 | | David | 34 | | Chris | 27 | | Sam | 31 | | David | 32 | | David | 37 | +-------------+------------+ 6 rows in set (0.00 sec)
Here is the query to get maximum age:
mysql> select StudentName,max(StudentAge) from DemoTable1964 group by StudentName;
This will produce the following output −
+-------------+-----------------+ | StudentName | max(StudentAge) | +-------------+-----------------+ | Chris | 27 | | David | 37 | | Sam | 31 | +-------------+-----------------+ 3 rows in set (0.00 sec)
Updated on: 31-Dec-2019
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