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Get only a single value from a specific MySQL row?
For this, use SELECT INTO variable with where clause. Let us first create a table −
mysql> create table DemoTable1896 ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(20), StudentMarks int ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1896(StudentName,StudentMarks) values('Chris',56);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1896(StudentName,StudentMarks) values('David',98);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1896(StudentName,StudentMarks) values('Mike',89);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1896(StudentName,StudentMarks) values('Sam',78);
Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1896;
This will produce the following output −
+-----------+-------------+--------------+ | StudentId | StudentName | StudentMarks | +-----------+-------------+--------------+ | 1 | Chris | 56 | | 2 | David | 98 | | 3 | Mike | 89 | | 4 | Sam | 78 | +-----------+-------------+--------------+ 4 rows in set (0.00 sec)
Here is the query to get value from a specific MySQL row −
mysql> set @Name:=NULL; Query OK, 0 rows affected (0.00 sec) mysql> select StudentName into @Name from DemoTable1896 where StudentMarks=98; Query OK, 1 row affected (0.00 sec)
Now you can display the value of the above variable −
mysql> select @Name;
This will produce the following output −
+-------+ | @Name | +-------+ | David | +-------+ 1 row in set (0.00 sec)
Updated on: 27-Dec-2019
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