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 ...
Parameterized Views in SQL Server Parameters were not supplied for the function 'sys.dm_exec_sql_text'. Parition column for a unique index must be a subset of index key Partition a table weekly on date column and create Clustered index on the Identity column Partition by and where condition ...
创建视图时,有关该视图的信息将存储在下列目录视图中:sys.views、sys.columns和sys.sql_expression_dependencies。 语句的文本CREATE VIEW存储在sys.sql_modules目录视图中。 对使用数值或浮点表达式定义的视图使用索引的查询的结果可能与不使用视图索引的类似查询不同。 此差异可能是在基础表上INSERTDELETE舍入错误或UPDA...
命名视图。 名称 (包括隐式或显式限定符) 不得标识目录中描述的表,视图,昵称或别名。 限定符不能是 SYSIBM、SYSCAT、SYSFUN 或 SYSSTAT (SQLSTATE 42939)。 该名称可以与不可用视图的名称相同 (请参阅不可用视图)。 在这种情况下,在 CREATE VIEW 语句中指定的新视图将替换不可用的视图。 当替换不可操作的视...
Built-in functions Built-in system objects and extensions Control-of-flow language Data definition language (DDL) statements Introduction to DDL Securing meta data objects U-SQL databases U-SQL database schemas U-SQL tables U-SQL indexes U-SQL statistics U-SQL views Introduction to views CREATE ...
Create and use views Create and use external tables Store query results to storage Query Parquet files and containers in Azure Synapse Link for Azure Cosmos DB Integrate Connect with tools and applications Troubleshoot serverless SQL pools Data Explorer ...
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, ...
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:
Microsoft Access SQL 引用 概述 入门 数据定义语言 概述 ADD USER 语句 ALTER TABLE 语句 ALTER USER 或 DATABASE 语句 CONSTRAINT 子句 CREATE INDEX 语句 CREATE PROCEDURE 语句 CREATE TABLE 语句 CREATE USER 或 GROUP 语句 CREATE VIEW 语句 DROP 语句 ...
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...