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

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)
Updated on: 2019-07-30T22:30:25+05:30

471 Views

Kickstart Your Career

Get certified by completing the course

Get Started
Advertisements