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)
raja
Published on 09-Oct-2019 15:48:13
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