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A solution could be to create a temporary table like this: -- If previous run of this query fails, the temp table will be deleted. -- Selecting into creates the temp table which fails if it already exists. IF EXISTS(SELECT [name] FROM tempdb.sys.tables WHERE [name] like '#dtBalansOpgesteldGefilterd%') BEGIN.
Sep 10, 2008 · The main advantage is readability and maintainabilty. Sometimes a CTE can save hundreds of lines of code. Instead of a repeating a huge sub-query one can use just a name as a variable. Corrections to the sub-query can be solved just in one place. The CTE can serve in ad-hoc queries and make your life easier.
Jan 20, 2011 · A CTE can be used to: Create a recursive query. For more information, see Recursive Queries Using Common Table Expressions. Substitute for a view when the general use of a view is not required; that is, you do not have to store the definition in metadata. Enable grouping by a column that is derived from a scalar subselect, or a function that is ...
Mar 27, 2009 · A (non recursive) CTE is treated very similarly to other constructs that can also be used as inline table expressions in SQL Server. Derived tables, Views, and inline table valued functions. Note that whilst BOL says that a CTE "can be thought of as temporary result set" this is a purely logical description.
460. You can have multiple CTE s in one query, as well as reuse a CTE: SELECT 1 AS id. ), cte2 AS. SELECT 2 AS id. Note, however, that SQL Server may reevaluate the CTE each time it is accessed, so if you are using values like RAND(), NEWID() etc., they may change between the CTE calls.
Jul 2, 2012 · Solution 1: This SQL to find the Nth highest salary should work in SQL Server, MySQL, DB2, Oracle, Teradata, and almost any other RDBMS: (note: low performance because of subquery) SELECT * /*This is the outer query part */. FROM Employee Emp1. WHERE (N-1) = ( /* Subquery starts here */.
Aug 7, 2013 · 1. each branch must be grouped. 2. records with ItemType 'product' and parent are the top node. 3. records with ItemType 'product' and non-NULL parent grouped after top node. 4. records with ItemType 'service' are bottom node of a branch. So, the order that I need the results, in this example, is: EstimateItemID.
Dec 20, 2016 · On a side note: See if you can break the habit of starting your CTE definitions with ;WITH and instead get into the habit of ending all your SQL statements with a semi-colon. It's more readable and better practice.
Dec 4, 2015 · Note: If SQL Server 2005† CTE cannot do what i was doing before in 2000‡, that's fine, and that's the answer. And whoever gives "it's not possible" as the answer will win the bounty. And whoever gives "it's not possible" as the answer will win the bounty.
You can't nest CTEs like that in SQL Server but you can use multiple CTEs the following way:;with test as ( select SRnum, gamenumber, StartOfDistribution, ApplicationNumber from #main where startofdistribution = '2011-06-14 00:00:00.000' and SRnum = '313' --order by SRnum, gamenumber, StartOfDistribution, ApplicationNumber ), outertest as ( select ApplicationNumber ,count(*) as RetailerAppearance from test group by ApplicationNumber having count(*) = 4 ) select count(*) from outertest
