日日操夜夜添-日日操影院-日日草夜夜操-日日干干-精品一区二区三区波多野结衣-精品一区二区三区高清免费不卡

我們知道 MySQL BETWEEN 運算符可用于從某個值范圍中選擇值。我們可以使用 BETWEEN 運算符和視圖來從基表中選擇某些范圍的值。為了理解這個概念，我們使用具有以下數據的基表“student_info” –

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)

登錄后復制

示例

以下查詢將創建一個名為“Info”的視圖，通過使用“BETWEEN”運算符選擇特定范圍內的某些值 –

mysql> Create or Replace view Info AS SELECT * from student_info WHERE Name BETWEEN 'C' AND 'P';
Query OK, 0 rows affected (0.14 sec)

mysql> Select * from info;
+------+--------+------------+------------+
| id   | Name   | Address    | Subject    |
+------+--------+------------+------------+
| 105  | Gaurav | Chandigarh | Literature |
| 133  | Mohan  | Delhi      | Computers  |
+------+--------+------------+------------+
2 rows in set (0.00 sec)

登錄后復制

同樣，我們可以將 NOT 與 BETWEEN 運算符結合使用來選擇與查詢中寫入的值不同的范圍 –

mysql> Create or Replace view Info AS SELECT * from student_info WHERE Name NOT BETWEEN 'C' AND 'P';
Query OK, 0 rows affected (0.06 sec)

mysql> Select * from Info;
+------+---------+------------+-----------+
| id   | Name    | Address    | Subject   |
+------+---------+------------+-----------+
| 101  | YashPal | Amritsar   | History   |
| 125  | Raman   | Shimla     | Computers |
| 130  | Ram     | Jhansi     | Computers |
| 132  | Shyam   | Chandigarh | Economics |
+------+---------+------------+-----------+
4 rows in set (0.00 sec)

登錄后復制

以上就是我們如何通過從基表中選擇某些范圍的值來創建 MySQL 視圖？的詳細內容，更多請關注www.92cms.cn其它相關文章！