In an indexed view, I'm able to create indexes on (persistent & precise) computed columns, I'm able to create indexes on functions and scalar expressions, but I don't seem to be able to create an index on an expression that contains at least one computed column. Is that by design?
In an indexed view, I'm able to create indexes on (persistent & precise) computed columns, I'm able to create indexes on functions and scalar expressions, but I don't seem to be able to create an index on an expression that contains at least one computed column. Is that by design?
看到这里,常用Oracle的同学是否开始看出了物化视图(materialized view)的意思?,呵呵,继续往下看。 听起来不错,原来MSSQL也提供了类似Oracle中物化视图的东西,只是名字不同,先别高兴,MSSQL的这个东西虽然不错,但似乎限制和要求还挺多的,似乎比Oracle的物化视图还多,接下来看看使用索引视图时的要求吧。 1) 确保索引视...
so,. let close it with MS web site words 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 may use indexed views to speed up the query execution...
Assume that you have an indexed view on a table in Microsoft SQL Server 2012 or SQL Server 2014. When you run a query that contains common language runtime (CLR) functions in the WHERE clause against this view, a fatal exception ...
顾名思义,索引视图就是建有索引的视图,这是MSSQL提供的一项技术,用于提升某些SQL语句的查询性能。索引视图上的第一个索引必须是唯一簇索引,之后,可以在视图上创建更多的非簇索引,因为视图上的簇索引存储方式和表上的簇索引一样,因此,视图上的簇索引可以提升某些查询的性能。查询优化器可以通过索引视图来加速查询的...
Any user-defined functions referenced in the view must be referenced by two-part names, <schema>.<function>. The data access property of a user-defined function must be NO SQL, and external access property must be NO. Common language runtime (CLR) functions can appear in the select list ...
situation is dramatically improved. But that’s not all. Now let’s run the original statement in Enterprise edition of SQL Server and see the plan. And this is the magic – even if you don’t reference the view in the select, SQL Server founds that it can use the view for this ...
User-defined functions referenced in the view must be created by using theWITH SCHEMABINDINGoption. Any user-defined functions referenced in the view must be referenced by two-part names,<schema>.<function>. The data access property of a user-defined function must beNO SQL, and external access...
Any user-defined functions referenced in the view must be referenced by two-part names, <schema>.<function>. The data access property of a user-defined function must be NO SQL, and external access property must be NO. Common language runtime (CLR) functions can appear in the select list ...