টেবিল তৈরি করা
mysql> create table DemoTable707 (
StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
StudentFirstName varchar(100),
StudentMarks int
);
Query OK, 0 rows affected (0.59 sec)
রেকর্ড ইনসার্ট করা
mysql> insert into DemoTable707(StudentFirstName,StudentMarks) values('John',45);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable707(StudentFirstName,StudentMarks) values(NULL,65);
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable707(StudentFirstName,StudentMarks) values('Chris',78);
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable707(StudentFirstName,StudentMarks) values(NULL,89);
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable707(StudentFirstName,StudentMarks) values('Robert',99);
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable707(StudentFirstName,StudentMarks) values(NULL,34);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable707(StudentFirstName,StudentMarks) values('Mike',43);
Query OK, 1 row affected (0.20 sec)
সকল রেকর্ড প্রদর্শন
mysql> select *from DemoTable707;
আউটপুট
+-----------+------------------+--------------+
| StudentId | StudentFirstName | StudentMarks |
+-----------+------------------+--------------+
| 1 | John | 45 |
| 2 | NULL | 65 |
| 3 | Chris | 78 |
| 4 | NULL | 89 |
| 5 | Robert | 99 |
| 6 | NULL | 34 |
| 7 | Mike | 43 |
+-----------+------------------+--------------+
7 rows in set (0.00 sec)
NULL মানসহ সর্ট করার কোয়েরি (NULL গুলো শেষে)
mysql> select *from DemoTable707 order by StudentFirstName IS NULL, StudentFirstName DESC;
আউটপুট
+-----------+------------------+--------------+
| StudentId | StudentFirstName | StudentMarks |
+-----------+------------------+--------------+
| 5 | Robert | 99 |
| 7 | Mike | 43 |
| 1 | John | 45 |
| 3 | Chris | 78 |
| 2 | NULL | 65 |
| 4 | NULL | 89 |
| 6 | NULL | 34 |
+-----------+------------------+--------------+
7 rows in set (0.00 sec)
