你可以向视图添加 SQL 函数、WHERE 以及 JOIN 语句,我们也可以提交数据,就像这些来自于某个单一的表。CREATE VIEW 语法CREATE VIEW view_name AS SELECT column1, column2, ... FROM table_name WHERE condition; 注释: 视图总是显示最近的数据。每当用户查询视图时,数据库引擎通过使用 SQL 语句来重建数据。
A view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. Watch given below video link for better understanding. https://www.youtube...
A virtual table based on the result-set of an SQL statement A function that modifies data in the database A temporary table used for backup purposesSubmit Answer » What is an Exercise? Test what you learned in the chapter: SQL View by completing 6 relevant exercises. To try more SQL...
SQL Updating a View A view can be updated with theCREATE OR REPLACE VIEWstatement. SQL CREATE OR REPLACE VIEW Syntax CREATEORREPLACEVIEWview_nameAS SELECTcolumn1,column2, ... FROMtable_name WHEREcondition; The following SQL adds the "City" column to the "Brazil Customers" view: ...
Specifying the join conditions in the FROM clause helps separate them from any other search ...
❮ SQL Keywords ReferenceCREATE VIEWIn SQL, a view is a virtual table based on the result set of an SQL statement.The CREATE VIEW command creates a view. The following SQL creates a view that selects all customers from Brazil:Example CREATE VIEW [Brazil Customers] AS SELECT CustomerName,...
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