Get the maximum value of a column with MySQL Aggregate function
To get the maximum value of a column, MySQL has a predefined aggregate function MAX(). Let us first create a table −
mysql> create table DemoTable
(
Id int
);
Query OK, 0 rows affected (0.96 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(100);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values(988);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable values(1000);
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable values(99);
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values(999);
Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+------+
| Id |
+------+
| 100 |
| 988 |
| 1000 |
| 99 |
| 999 |
+------+
5 rows in set (0.00 sec)
Following is the query to get the maximum value of a column −
mysql> select max(Id) AS MaxId from DemoTable;
This will produce the following output −
+-------+
| MaxId |
+-------+
| 1000 |
+-------+
1 row in set (0.03 sec)
Published on 01-Oct-2019 07:15:31
