You can use SET command for temporary variable assignment.
The syntax is as follows
SET @anyVariableName=(SELECT yourColumnName FROM yourTableName WHERE yourCondition);
To understand the above syntax, let us create a table. The query to create a table is as follows
mysql> create table tempVariableAssignment -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20), -> Age int -> ); Query OK, 0 rows affected (0.59 sec)
Now insert some records in the table using insert command
mysql> insert into tempVariableAssignment(Name,Age) values('John',25); Query OK, 1 row affected (0.14 sec) mysql> insert into tempVariableAssignment(Name,Age) values('Carol',26); Query OK, 1 row affected (0.17 sec) mysql> insert into tempVariableAssignment(Name,Age) values('Sam',28); Query OK, 1 row affected (0.13 sec) mysql> insert into tempVariableAssignment(Name,Age) values('David',19); Query OK, 1 row affected (0.19 sec) mysql> insert into tempVariableAssignment(Name,Age) values('Bob',23); Query OK, 1 row affected (0.19 sec)
Display all records from the table using select statement.
The query is as follows
mysql> select *from tempVariableAssignment;
The following is the output
+----+-------+------+ | Id | Name Age | +----+-------+------+ | 1 | John | 25 | | 2 | Carol | 26 | | 3 | Sam | 28 | | 4 | David | 19 | | 5 | Bob | 23 | +----+-------+------+ 5 rows in set (0.00 sec)
Here is the query for MySQL temporary variable assignment
mysql> set @findAge=(select Age from tempVariableAssignment where Id=4); Query OK, 0 rows affected (0.02 sec)
Display the value of variable @findAge.
The query is as follows
mysql> select @findAge;
The following is the output
+----------+ | @findAge | +----------+ | 19 | +----------+ 1 row in set (0.01 sec)
Here is an alternate query
mysql> select Age INTO @anotherAge -> from tempVariableAssignment where Id=4; Query OK, 1 row affected (0.00 sec)
Display the value of variable @anotherAge.
The query is as follows
mysql> select @anotherAge;
The following is the output
+-------------+ | @anotherAge | +-------------+ | 19 | +-------------+ 1 row in set (0.00 sec)