MySQL query to get the highest value from a single row with multiple columns

To get the highest value, use the GREATEST() method. Let us first create a table −

mysql> create table DemoTable
   -> (
   -> Value1 int,
   -> Value2 int,
   -> Value3 int
   -> );
Query OK, 0 rows affected (1.29 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(100,600,400);
Query OK, 1 row affected (0.19 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

Output

+--------+--------+--------+
| Value1 | Value2 | Value3 |
+--------+--------+--------+
| 100    | 600    | 400    |
+--------+--------+--------+
1 row in set (0.00 sec)

Following is the query to get the highest value −

mysql> select greatest(Value1,Value2,Value3) AS HighestFrom1Row from DemoTable;

Output

+-----------------+
| HighestFrom1Row |
+-----------------+
|   600           |
+-----------------+
1 row in set (0.00 sec)