কিভাবে MySQL এ একাধিক এবং শর্তাবলী কাজ করবেন?

MySQL-এ একাধিক এবং শর্তগুলির সাথে কাজ করতে, নিম্নলিখিত সিনট্যাক্স −

select *from yourTableName where yourColumnName1=yourValue1 and yourColumnName2=yourValue2 and yourColumnName3=yourValue3;

আসুন প্রথমে একটি টেবিল তৈরি করি -

mysql> create table DemoTable
   (
   StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   StudentName varchar(20),
   StudentAge int,
   StudentCountryName varchar(40)
   );
Query OK, 0 rows affected (0.59 sec)

সন্নিবেশ কমান্ড −

mysql> insert into DemoTable(StudentName,StudentAge,StudentCountryName) values('John',23,'US');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(StudentName,StudentAge,StudentCountryName) values('Carol',21,'UK');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(StudentName,StudentAge,StudentCountryName) values('John',21,'US');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(StudentName,StudentAge,StudentCountryName) values('John',21,'AUS');
Query OK, 1 row affected (0.14 sec)

সিলেক্ট স্টেটমেন্ট -

mysql> select *from DemoTable;

আউটপুট

+-----------+-------------+------------+--------------------+
| StudentId | StudentName | StudentAge | StudentCountryName |
+-----------+-------------+------------+--------------------+
| 1         | John        | 23         | US                 |
| 2         | Carol       | 21         | UK                 |
| 3         | John        | 21         | US                 |
| 4         | John        | 21         | AUS                |
+-----------+-------------+------------+--------------------+
4 rows in set (0.00 sec)

MySQL −

mysql> select *from DemoTable where StudentName="John" and StudentAge=21 and StudentCountryName="AUS";

আউটপুট

+-----------+-------------+------------+--------------------+
| StudentId | StudentName | StudentAge | StudentCountryName |
+-----------+-------------+------------+--------------------+
| 4         | John        | 21         | AUS                |
+-----------+-------------+------------+--------------------+
1 row in set (0.00 sec)