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How can we create a MySQL view using ORDER BY clause?

王林
王林forward
2023-09-22 21:01:061060browse

我们如何使用 ORDER BY 子句创建 MySQL 视图?

We can use the MySQL ORDER BY clause to sort the records in the result set. . To understand the GROUP BY clause with a view, we create a view named "Info" using the base table "Student_info" with the following data -

mysql> Select * from Student_info;
+------+---------+------------+------------+
| id   | Name    | Address    | Subject    |
+------+---------+------------+------------+
| 101  | YashPal | Amritsar   | History    |
| 105  | Gaurav  | Chandigarh | Literature |
| 125  | Raman   | Shimla     | Computers  |
| 130  | Ram     | Jhansi     | Computers  |
| 132  | Shyam   | Chandigarh | Economics  |
| 133  | Mohan   | Delhi      | Computers  |
+------+---------+------------+------------+
6 rows in set (0.00 sec)

Syntax

Create or Replace View view_name AS Select_statements FROM table ORDER BY expression [ASC|DESC]

Example

mysql> Create or Replace View Info AS select ID, Name, Address , Subject FROM Student_info ORDER BY Name ASC;
Query OK, 0 rows affected (0.11 sec)

mysql> Select * from info;
+------+---------+------------+------------+
| ID   | Name    | Address    | Subject    |
+------+---------+------------+------------+
| 105  | Gaurav  | Chandigarh | Literature |
| 133  | Mohan   | Delhi      | Computers  |
| 130  | Ram     | Jhansi     | Computers  |
| 125  | Raman   | Shimla     | Computers  |
| 132  | Shyam   | Chandigarh | Economics  |
| 101  | YashPal | Amritsar   | History    |
+------+---------+------------+------------+
6 rows in set (0.00 sec)

mysql> Create or Replace View Info AS select ID, Name, Address , Subject FROM Student_info ORDER BY Name DESC;
Query OK, 0 rows affected (0.10 sec)

mysql> Select * from info;
+------+---------+------------+------------+
| ID   | Name    | Address    | Subject    |
+------+---------+------------+------------+
| 101  | YashPal | Amritsar   | History    |
| 132  | Shyam   | Chandigarh | Economics  |
| 125  | Raman   | Shimla     | Computers  |
| 130  | Ram     | Jhansi     | Computers  |
| 133  | Mohan   | Delhi      | Computers  |
| 105  | Gaurav  | Chandigarh | Literature |
+------+---------+------------+------------+
6 rows in set (0.00 sec)

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