datafile 'lyayzh_test_data.dbf' --初始化表空间大小 100M 可自动增长 size 100m autoextend on; --查询此数据库所有表 select * from dba_data_files; --创建用户 create user lyayzh identified by lyayzh --指定用户使用的表空间 default tablespace lyayzh_test --指定用户使用的临时表空间 temporary t...
SQL Server 和 Azure SQL Database 的語法。 syntaxsql 複製 CREATE [ OR ALTER ] VIEW [ schema_name . ] view_name [ (column [ ,...n ] ) ] [ WITH <view_attribute> [ ,...n ] ] AS select_statement [ WITH CHECK OPTION ] [ ; ] <view_attribute> ::= { [ ENCRYPTION ] [ SCHE...
Transact-SQL 语法约定 语法 SQL Server 和 Azure SQL 数据库 的语法。 syntaxsql CREATE[ORALTER]VIEW[schema_name. ]view_name[ (column [ ,...n ] ) ] [WITH<view_attribute>[ ,...n ] ]ASselect_statement[WITHCHECKOPTION] [ ; ]<view_attribute>::={ [ENCRYPTION] [SCHEMABINDING] [VIEW_META...
alter table customers add constraint cn_customerDateinsystem check (dateinsystem <= getdate()) getdate()函数得到当前时间,上面这个例子的意思是dateinsystem列的数据不能大于当前时间 现在如果给这个列插入一个明天的时间,就会出错 7:default约束 如果插入的新行在定义了默认值的列上没有给出值,那么这个列...
To create a view in SQL Server, you must have the CREATE VIEW permission in the database and the ALTER SCHEMA permission on the schema in which the view is being created.View Attributes A CREATE VIEW statement can include the following attributes:Attribute...
In this article Steps Required SET options for indexed views Deterministic view requirement Additional requirements Show 6 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance This article describes how to create indexes on a view. The first index created on a view must...
Note: Not all SQL types support this. (e.g. can be done in Oracle and DBT, but not PostgreSQL.)To create a materialized view, add the MATERIALIZED keyword:CREATE MATERIALIZED VIEW myView AS [Query]; To refresh the view manually use the following command:REFRESH MATERIALIZED VIEW [view nam...
you have to "script it out"... in SSMS select the view and rx click on it.. select the "Script as" ->"Drop and CREATE to" ->"New query window".. this will open a new query window with the exact statements to drop and re-create the view.. modify it accordingly to your n...
table_or_view_name 要建立索引之資料表或檢視的名稱。 若要在檢視上建立索引,必須使用 定義 SCHEMABINDING檢視。 必須先在檢視表上建立唯一叢集索引,才能建立任何非叢集索引。 如需索引檢視的詳細資訊,請參閱。 從SQL Server 2016 (13.x) 開始,此物件可以是與叢集資料行存放區索引一併儲存的資料表。 當<databa...
Use this statement to create a reusable routine that can be used in these ways: In Transact-SQL statements such as SELECT In applications that call the function In the definition of another user-defined function To parameterize a view or improve the functionality of an indexed view To define ...