我正在尝试在以下视图上创建索引:
SELECT 'Candidate' AS Source, CandidateID AS SourceId, LastName + ', ' + FirstName AS SourceName
FROM dbo.Candidates
UNION
SELECT 'Resource' AS Source, ResourceID AS SourceId, LastName + ', ' + FirstName AS SourceName
FROM dbo.Resources
UNION
SELECT 'Deal' AS Source, DealID AS SourceId, CONVERT(varchar, Number) + '-' + CONVERT(varchar, RevisionNumber) AS SourceName
FROM dbo.Deals
UNION
SELECT 'Job Order' AS Source, JobOrderID AS SourceId, CustomerNumber AS SourceName
FROM dbo.JobOrders
我收到以下错误:
Msg 1939, Level 16, State 1, Line 2
Cannot create index on view '_Source' because the view is not schema bound.
我将 WITH SCHEMABINDING 添加到 CREATE 中,现在出现以下错误:
Msg 10116, Level 16, State 1, Line 2
Cannot create index on view 'DEALMAKER.dbo._Source' because it contains one or more UNION, INTERSECT, or EXCEPT operators. Consider creating a separate indexed view for each query that is an input to the UNION, INTERSECT, or EXCEPT operators of the original view.
我的问题是:
我将如何在此视图上创建索引?创建单独的索引视图真的有效吗?
最后,我真的会看到任何可能加入此视图的查询的性能改进吗?
提前致谢!