How to store Query Result in a variable using MySQL?
To store query result in a variable with MySQL, use the SET command. The syntax is as follows −
SET @anyVariableName = ( yourQuery);
To understand the above concept, let us create a table. The following is the query to create a table −
mysql> create table QueryResultDemo
−> (
−> Price int
−> );
Query OK, 0 rows affected (0.59 sec)
Now let us insert some records into the table. The following is the query to insert records −
mysql> insert into QueryResultDemo values(100);
Query OK, 1 row affected (0.17 sec)
mysql> insert into QueryResultDemo values(20);
Query OK, 1 row affected (0.13 sec)
mysql> insert into QueryResultDemo values(200);
Query OK, 1 row affected (0.10 sec)
mysql> insert into QueryResultDemo values(80);
Query OK, 1 row affected (0.15 sec)
Display all records from the table with the help of select statement. The query to display all records is as follows −
mysql> select *from QueryResultDemo;
The following is the output −
+-------+
| Price |
+-------+
| 100 |
| 20 |
| 200 |
| 80 |
+-------+
4 rows in set (0.00 sec)
Now you can set the query result in a variable with the help of SET command. The query is as follows.
mysql> Set @TotalPrice = (select sum(Price) from QueryResultDemo);
Query OK, 0 rows affected (0.00 sec)
Check what is the value stored in variable “TotalPrice”, using the SELECT statement −
mysql> select @TotalPrice;
The following is the output −
+-------------+
| @TotalPrice |
+-------------+
| 400 |
+-------------+
1 row in set (0.00 sec)
Published on 10-Jan-2019 17:39:56
