As we know that while creating a view, providing the list of columns is optional. But if we are providing the name of the columns while creating the view then the number of names in the list of columns must be the same as the number of columns retrieved by the SELECT statement.
Example
The following example will illustrate by creating the views with column list −
mysql> Select * from student_detail; +-----------+-------------+------------+ | Studentid | StudentName | address | +-----------+-------------+------------+ | 100 | Gaurav | Delhi | | 101 | Raman | Shimla | | 103 | Rahul | Jaipur | | 104 | Ram | Chandigarh | | 105 | Mohan | Chandigarh | +-----------+-------------+------------+ 5 rows in set (0.17 sec) mysql> Create view View_student_detail_columns AS SELECT Studentid, StudentName FROM Student_Detail; Query OK, 0 rows affected (0.10 sec)
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正在下面的代码外，咱们给没了二列，并正在运转查问以从视图外猎取数据后，它将仅透露表现咱们正在创立视图时给定的列名。
mysql> Select * from View_Student_detail_columns; +-----------+-------------+ | Studentid | StudentName | +-----------+-------------+ | 100 | Gaurav | | 101 | Raman | | 103 | Rahul | | 104 | Ram | | 105 | Mohan | +-----------+-------------+ 5 rows in set (0.08 sec)
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以上即是咱们假设建立带有列列表的 MySQL 视图？的具体形式，更多请存眷萤水红IT仄台另外相闭文章！
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