Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)You can create views in the SQL Server Database Engine by using SQL Server Management Studio or Transact-SQL. A view can be used for the following purposes:...
建立檢視時,檢視的相關資訊會儲存在下列目錄檢視中:sys.views、sys.columns 和sys.sql_expression_dependencies。 語句的 CREATE VIEW 文字會儲存在 sys.sql_modules 目錄檢視中。 在以數值 或浮點 表達式定義的檢視上使用索引的查詢,其結果可能與不使用檢視上索引的類似查詢不同。 此差異可能是在、 INSERT或DELETE ...
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Create an indexed view: a T-SQL example The following example creates a view and an index on that view, in the AdventureWorks database. SQL Copy --Set the options to support indexed views. SET NUMERIC_ROUNDABORT OFF; SET ANSI_PADDING, ANSI_WARNINGS, CONCAT_NULL_YIELDS_NULL, ARITHABORT, ...
Creating a unique clustered index on a view improves query performance, because the view is stored in the database in the same way a table with a clustered index is stored. The query optimizer can use indexed views to speed up the query execution. The view doesn't have to be referenced ...
However this is not justification for creating views of every column combination so that SELECT * can always be used. In fact it is a better practice to discourage the use of SELECT * and have people query specifically for the columns they care about because then the least amount of data ...
Create an indexed view: a T-SQL example The following example creates a view and an index on that view, in theAdventureWorksdatabase. SQLCopy --Set the options to support indexed views.SETNUMERIC_ROUNDABORTOFF;SETANSI_PADDING, ANSI_WARNINGS, CONCAT_NULL_YIELDS_NULL, ARITHABORT, QUOTED_IDENTIFIE...
默认值为OFF“超大规模”Azure SQL 数据库除外。 对于“超大规模”中的所有索引生成作,除非使用可恢复索引生成,否则始终 SORT_IN_TEMPDBON。 对于可恢复索引生成,SORT_IN_TEMPDB 始终OFF。 ON 用于生成索引的中间排序结果存储在其中 tempdb。 这可以减少创建索引所需的时间。 但是,这会增加索引生成期间所使用的磁盘...
Applies to: SQL Server 2008 (10.0.x) SP 1 and later versions. Indicates that the Database Engine converts the original text of the CREATE FUNCTION statement to an obfuscated format. The output of the obfuscation isn't directly visible in any catalog views. Users that have no access to sys...
26:SQL>createuserods identifiedbyodsdefaulttablespace tbs_ods_data; 27: 28:Usercreated. 29: 30:SQL>grantconnect,resourcetoods; 31: 32:Grantsucceeded. 在另外一个窗口,以dm账号登录数据库 1:[oracle@DB-Server bdump]$ sqlplus /nolog 2: