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Fetch maximum value from a column with values as string numbers like Value440, Value345, etc. in SQL
For this, you can use MAX() along with substring(). Let us first create a table −
mysql> create table DemoTable1337 -> ( -> Value varchar(50) -> ); Query OK, 0 rows affected (0.58 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1337 values('Value400');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable1337 values('Value345');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable1337 values('Value567');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable1337 values('Value489');
Query OK, 1 row affected (0.22 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1337;
This will produce the following output −
+----------+ | Value | +----------+ | Value400 | | Value345 | | Value567 | | Value489 | +----------+ 4 rows in set (0.00 sec)
Following is the query to find maximum in value in MySQL when column is varchar −
mysql> select max(cast(substring(Value, 6) as decimal(10,2))) as MaximumValue from DemoTable1337;
This will produce the following output −
+--------------+ | MaximumValue | +--------------+ | 567.00 | +--------------+ 1 row in set (0.04 sec)
Updated on: 05-Nov-2019
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