酷表ChatExcel
北大团队开发的通过聊天来操作Excel表格的AI工具
48 查看详情 
我们知道 MySQL BETWEEN 运算符可用于从某个值范围中选择值。我们可以使用 BETWEEN 运算符和视图来从基表中选择某些范围的值。为了理解这个概念，我们使用具有以下数据的基表“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)
示例
以下查询将创建一个名为“Info”的视图，通过使用“BETWEEN”运算符选择特定范围内的某些值 –
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)
同样，我们可以将 NOT 与 BETWEEN 运算符结合使用来选择与查询中写入的值不同的范围 –
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)
以上就是我们如何通过从基表中选择某些范围的值来创建 MySQL 视图？的详细内容，更多请关注创想鸟其它相关文章！
版权声明：本文内容由互联网用户自发贡献，该文观点仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。
如发现本站有涉嫌抄袭侵权/违法违规的内容， 请发送邮件至 chuangxiangniao@163.com 举报，一经查实，本站将立刻删除。
发布者：程序猿，转转请注明出处：https://www.chuangxiangniao.com/p/235794.html
微信扫一扫 
支付宝扫一扫 
