indexed-view

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I have a table of address data in my SQL server database. This table is not normalized so it contain many addresses the are repeated. Each unique address

问题 I have a view that I'd like to apply a full text index on. It of course needs a unique clustered index to allow for the full text index. Unforunately, I learned that you cannot create an indexed view that contains outer joins. Problem is that my view needs these outer joins! Is there a way to make this happen, or am I going to be stuck writing a complex stored procedure? 回答1: Is it possible to create a dummy record to join to for the purposes of this view? 来源： https://stackoverflow.com

问题 Related to my prior question about having a sequence without interim holes (a guarantee that the numbers that are visible to readers are always incrementing) enter link description here I'd like to ask if a solution I devised makes sense. I created a table with a rowversion column. If I understand this correctly, SQL Server guarantees that the values will be always incrementing. Because this is just a bunch of bytes, queries like WHERE RowVer > 1567 would requires a cast and hence would cause

问题 The Question Assuming I make an indexed view on a table containing a varbinary(max) column, will the binary content be physically copied into the indexed view's B-Tree, or will the original fields just be "referenced" somehow, without physically duplicating their content? In other words, if I make an indexed view on a table containing BLOBs, will that duplicate the storage needed for BLOBs? More Details When using a full-text index on binary data, such as varbinary(max) , we need an

问题 I see from the 2005 documentation that you cannot create an indexed view from an Xml column. Is this possible in 2008 or 2008R2? I can't find any documentation saying that it is something that was added but am looking for confirmation and I don't have handy access to a 2008 environment at the moment. EDIT My motivation behind this is that the amount of Xml is growing to the point where SSRS reports which aggregate data from the Xml are becoming slow. 回答1: I don't believe this is possible.

问题 I have an indexed view but when I run queries on that view the index which is built on View is not applied and the query runs without index. Below is my dummy script: Tables + View+ Index on View CREATE TABLE P_Test ( [PID] INT IDENTITY, [TID] INT, [StatusID] INT ) CREATE TABLE T_Test ( [TID] INT IDENTITY, [FID] INT, ) CREATE TABLE F_Test ( [FID] INT IDENTITY, [StatusID] INT ) GO INSERT INTO F_Test SELECT TOP 1000 ABS(CAST(NEWID() AS BINARY(6)) %10) --below 100 FROM master..spt_values INSERT

问题 I'm trying to optimize a query which uses a view in MySQL 5.1. It seems that even if I select 1 column from the view it always does a full table scan. Is that the expected behaviour? The view is just a SELECT "All Columns From These Tables - NOT *" for the tables I have specified in the first query below. This is my explain output from when i select the indexed column PromotionID from the query which makes up the view. As you can see it is vastly different from the output on the view. EXPLAIN

问题 I was told that there is new a feature in SQL Server 2005 called index filters. What I want to do is add an Index to a column and have the index ignore null values. I can't find good information on this feature (maybe my source is wrong). Can anyone provide additional information on this feature? 回答1: CREATE INDEX ix_mytable_mycolumn ON mytable(mycolumn) WHERE mycolumn IS NOT NULL This will work only in SQL Server 2008 , though. From the docs: WHERE <filter_predicate> Creates a filtered index

问题 I have a indexed view where I basically need to do this SELECT ... CASE WHEN ISDATE(ColumnName) = 1 THEN CONVERT(datetime, ColumnName, 103) ELSE NULL END AS ViewColumn .... Trying to create the index yields: Cannot create index on view '....'. The function 'isdate' yields nondeterministic results. Use a deterministic system function, or modify the user-defined function to return deterministic results. MSDN says ISDATE is deterministic only if you use it with the CONVERT function, if the

问题 I know in SQL Server you can create indexes on a view, then the view saves the data from the underlying table. Then you can query the view. But, why I need to use view instead of table? 回答1: You may want to use a view to simplify on queries. In our projects, the consensus is on using views for interfaces, and especially "report interfaces". Imagine you've got a client table, and the manager wants a report every morning with the client's name, and their account balance (or whatever). If you