SQL Dropping a View A view is deleted with theDROP VIEWstatement. SQL DROP VIEW Syntax DROPVIEWview_name; The following SQL drops the "Brazil Customers" view: Example DROPVIEW[Brazil Customers]; Track your progress - it's free! Log inSign Up...
←SQL AUTO INCREMENT 字段SQL Server 和 MySQL 中的 Date 函数→ SQL CREATE VIEW、REPLACE VIEW、 DROP VIEW 语句 SQL 视图(Views) 视图是可视化的表。 本章讲解如何创建、更新和删除视图。 SQL CREATE VIEW 语句 在SQL 中,视图是基于 SQL 语句的结果集的可视化的表。 视图包含行和列,就像一个真实的表。
DROP VIEW TheDROP VIEWcommand deletes a view. The following SQL drops the "Brazil Customers" view: Example DROPVIEW[Brazil Customers]; Try it Yourself » ❮ SQL Keywords Reference Track your progress - it's free! Log inSign Up
SQL 视图(Views) 视图是可视化的表。 本章讲解如何创建、更新和删除视图。 SQL CREATE VIEW 语句 在 SQL 中,视图是基于 SQL 语句的结果集的可视化的表。 视图包含行和列,就像一个真实的表。视图中的字段就是来自一个或多个数据库中的真实的表中的字段。 您可以向视图
A view is a virtual table. This chapter shows how to create, update, and delete a view. SQL CREATE VIEW Statement In SQL, 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 ...
A view is a virtual table based on the result-set of a SELECT statement. 什么是视图? 在SQL里,视图是一个基于SELECT查询的result-set的虚拟数据表。 视图包含列和行,就象是一个真正的表格。视图里的字段来自于数据库里一个或者多个真正的表。你可以给视图添加SQL函数,WHERE和JOIN语句,如同来自于一个表格...
Microsoft first introduced theTRANSLATE()function in SQL Server 2017. We could use TRANSLATE() in Oracle long before then. You must ensure your database compatibility level is at 140 or higher to take advantage of it. Microsoft definesTRANSLATE()as a function that returns the string provided as...
SQL指南-IN IN IN 运算符可用于如果你知道一列你所想返回的精确值。 SELECT column_name FROM table_nameWHERE column_name IN (value1,value2,..) --- 原始表 (用于示例) --- 示例1 使用下面的SQL语显示LastName 等于"Hansen" 或者"Pettersen"的人 : SELECT * FROM Persons WHERE LastName IN ('Hans...
REPLACE 在字符串中搜索子字符串并替换所有匹配项。匹配区分大小写。如果找到匹配项，它将用 newsubstring...
An SQL view is a virtual table or a result-set generated by the SELECT query. Unlike physical tables, views do not store data in a database. When we run the SELECT query to populate the data, it executes a query that creates the view (View definition). ...