Storing value from a MySQL SELECT statement to a variable?

Let us first create a table −

mysql> create table DemoTable631 (
   StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,StudentName varchar(100)
);
Query OK, 0 rows affected (0.83 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable631(StudentName) values('John Smith');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable631(StudentName) values('Adam Smith');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable631(StudentName) values('David Miller');
Query OK, 1 row affected (0.16 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable631;

This will produce the following output −

+-----------+--------------+
| StudentId | StudentName  |
+-----------+--------------+
|         1 | John Smith   |
|         2 | Adam Smith   |
|         3 | David Miller |
+-----------+--------------+
3 rows in set (0.00 sec)

Following is the query to store value from select to a variable −

mysql> set @fullName=(select StudentName from DemoTable631 where StudentId=2);
Query OK, 0 rows affected (0.00 sec)

Now you can display the value of a variable −

mysql> select @fullName;

This will produce the following output −

+------------+
| @fullName  |
+------------+
| Adam Smith |
+------------+
1 row in set (0.00 sec)

AmitDiwan

Published on 23-Aug-2019 07:54:46