A single MySQL query to update only specific records in a range without updating the entire column

Let us first create a table −

mysql> create table DemoTable (    Name varchar(40),    Position int ); Query OK, 0 rows affected (1.17 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('Chris',90); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('David',67); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Bob',55); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('Sam',40); Query OK, 1 row affected (0.15 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+-------+----------+ | Name | Position | +-------+----------+ | Chris |     90 | | David |     67 | | Bob |     55 | | Sam |     40 | +-------+----------+ 4 rows in set (0.00 sec)

Following is the query to update only specific records in a range without updating the entire column −

mysql> update DemoTable    set Position=Position+10    where Position > 50 and Position < 90; Query OK, 2 rows affected (0.11 sec) Rows matched : 2 Changed : 2 Warnings : 0

Let us check the table records once again −

mysql> select *from DemoTable;

This will produce the following output −

+-------+----------+ | Name | Position | +-------+----------+ | Chris |    90 | | David |    77 | | Bob |    65 | | Sam |    40 | +-------+----------+ 4 rows in set (0.00 sec)