Update multiple values in a table with MySQL IF Statement

Let us first create a table −

mysql> create table DemoTable716 (
   Id varchar(100),
   Value1 int,
   Value2 int,
   Value3 int
);
Query OK, 0 rows affected (0.65 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable716 values('100',45,86,79);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable716 values('101',67,67,99);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable716 values('102',77,57,98);
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable716 values('103',45,67,92);
Query OK, 1 row affected (0.16 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable716;

This will produce the following output -

+------+--------+--------+--------+
| Id   | Value1 | Value2 | Value3 |
+------+--------+--------+--------+
| 100  | 45     | 86     | 79     |
| 101  | 67     | 67     | 99     |
| 102  | 77     | 57     | 98     |
| 103  | 45     | 67     | 92     |
+------+--------+--------+--------+
4 rows in set (0.00 sec)

Following is the query to update multiple values in a table −

mysql> update DemoTable716
   set Value3=if(Value1=67 OR Value2=67,67,NULL) where Id='101';
Query OK, 1 row affected (0.14 sec)
Rows matched: 1 Changed: 1 Warnings: 0

Let us check the table records once again −

mysql> select *from DemoTable716;

This will produce the following output -

+------+--------+--------+--------+
| Id   | Value1 | Value2 | Value3 |
+------+--------+--------+--------+
| 100  | 45     | 86     | 79     |
| 101  | 67     | 67     | 67     |
| 102  | 77     | 57     | 98     |
| 103  | 45     | 67     | 92     |
+------+--------+--------+--------+
4 rows in set (0.00 sec)

AmitDiwan

Published on 22-Aug-2019 07:14:13

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