Updating a MySQL table row column by appending a value from user defined variable?
Let us first create a table −
mysql> create table DemoTable1349
-> (
-> ProductId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
-> ProductPrice int
-> );
Query OK, 0 rows affected (0.71 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1349(ProductPrice) values(7644);
Query OK, 1 row affected (0.28 sec)
mysql> insert into DemoTable1349(ProductPrice) values(90843);
Query OK, 1 row affected (0.06 sec)
mysql> insert into DemoTable1349(ProductPrice) values(9083);
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable1349(ProductPrice) values(10000);
Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1349;
This will produce the following output −
+-----------+--------------+
| ProductId | ProductPrice |
+-----------+--------------+
| 1 | 7644|
| 2 | 90843|
| 3 | 9083|
| 4 | 10000|
+-----------+--------------+
4 rows in set (0.00 sec)
Following is the query to update MySQL table row column. At first, we have set a user-defined variable, which we will append later −
mysql> set @AppendValue:=500;
Query OK, 0 rows affected (0.00 sec)
mysql> update DemoTable1349 set ProductPrice=ProductPrice+@AppendValue where ProductId=4;
Query OK, 1 row affected (0.13 sec)
Rows matched: 1 Changed: 1 Warnings: 0
Let us check the table records once again −
mysql> select * from DemoTable1349;
This will produce the following output −
+-----------+--------------+
| ProductId | ProductPrice |
+-----------+--------------+
| 1 | 7644|
| 2 | 90843|
| 3 | 9083|
| 4 | 10500|
+-----------+--------------+
4 rows in set (0.00 sec)
Published on 05-Nov-2019 09:28:27
