MySQL query to get the max value with numeric values in varchar field?

To get the max value, use the max() function. Let us create a table first −

mysql> create table findMaxValueInVarcharField    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Value varchar(200)    -> ); Query OK, 0 rows affected (1.09 sec)

Following is the query to insert some records in the table using insert command −

mysql> insert into findMaxValueInVarcharField(Value) values('200'); Query OK, 1 row affected (0.14 sec) mysql> insert into findMaxValueInVarcharField(Value) values('1000'); Query OK, 1 row affected (0.25 sec) mysql> insert into findMaxValueInVarcharField(Value) values('899474'); Query OK, 1 row affected (0.18 sec) mysql> insert into findMaxValueInVarcharField(Value) values('39474'); Query OK, 1 row affected (0.15 sec) mysql> insert into findMaxValueInVarcharField(Value) values('4958'); Query OK, 1 row affected (0.12 sec)

Following is the query to display all records from the table using select statement −

mysql> select * from findMaxValueInVarcharField;

This will produce the following output −

+----+--------+ | Id | Value | +----+--------+ | 1 | 200 | | 2 | 1000 | | 3 | 899474 | | 4 | 39474 | | 5 | 4958 | +----+--------+ 5 rows in set (0.00 sec)

Following is the query to get the maximum from numeric values in a varchar field −

mysql> select max(cast(Value as unsigned) ) AS MaximumValueFromVarcharField from findMaxValueInVarcharField;

This will produce the following output −

+------------------------------+ | MaximumValueFromVarcharField | +------------------------------+ | 899474 | +------------------------------+ 1 row in set (0.00 sec)