IIF Statement Equivalent
Feb 22, 2008
Hello,
I'm creating a view in SQL and am looking for something equivalent to the IIF ststement in Access.
Basically I want to create 2 new columns, which are based on the result of 1 of the other columns.
So if in my columns I have :
ID - NAME - FLAG - TIMEFROM - TIMETO
11 - Fred - 0 - 09:00 - 10:30
12 - John - 1 - 11:30 - 15:30
etc, etc, etc
I want to add the first new column saying something along the lines of "If Flag = 0 then DateTo - DateFrom, otherwise Null"
and then add a second column saying "If Flag = 1 then DateTo - DateFrom, otherwise Null"
Therefore the above would show :
ID - NAME - FLAG - TIMEFROM - TIMETO - NEWCOL1 - NEWCOL2
11 - Fred - 0 - 10:00 - 10:30 - 0:30 - Null
12 - John - 1 - 11:30 - 15:30 - Null - 4:00
etc, etc, etc
This in turn would give me 2 new columns which would show value 1 and value 2 - 1 being where the flag is not checked, and 2 being where the flag is checked.
Does this make sense ?
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Jun 26, 2006
Using ms sql 2000I have 2 tables.I have a table which has information regarding a computer scan. Eachrecord in this table has a column called MAC which is the unique ID foreach Scan. The table in question holds the various scan results ofevery scan from different computers. I have an insert statement thatworks however I am having troulbe getting and update statement out ofit, not sure if I'm using the correct method to insert and thats why orif I'm just missing something. Anyway the scan results is stored as anXML document(@iTree) so I have a temp table that holds the releventinfo from that. Here is my Insert statement for the temporary table.INSERT INTO #tempSELECT * FROM openxml(@iTree,'ComputerScan/scans/scan/scanattributes/scanattribute', 1)WITH(ID nvarchar(50) './@ID',ParentID nvarchar(50) './@ParentID',Name nvarchar(50) './@Name',scanattribute nvarchar(50) '.')Now here is the insert statement for the table I am having troublewith.INSERT INTO tblScanDetail (MAC, GUIID, GUIParentID, ScanAttributeID,ScanID, AttributeValue, DateCreated, LastModified)SELECT @MAC, #temp.ID, #temp.ParentID,tblScanAttribute.ScanAttributeID, tblScan.ScanID,#temp.scanattribute, DateCreated = getdate(),LastModified =getdate()FROM tblScan, tblScanAttribute JOIN #temp ONtblScanAttribute.Name =#temp.NameIf there is a way to do this without the temporary table that would begreat, but I haven't figured a way around it yet, if anyone has anyideas that would be great, thanks.
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Jun 20, 2013
Problem Summary: Merge Statement takes several times longer to execute than equivalent Update, Insert and Delete as separate statements. Why?
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Obviously, I am going to use the separate UPDATE, INSERT & DELETE statements. The actual query plans for the four statements ( combined MERGE and the separate UPDATE, INSERT & DELETE ) are attached. SQL Code to create the source and target tables and the actual queries themselves are below. I've also included the statistics created by my test run. Nothing else was running on the server when I ran the test.
Server Configuration:
SQL Server 2008 R2 SP1, Enterprise Edition
3 x Quad-Core Xeon Processor
Max Degree of Parallelism = 8
148 GB RAM
SQL Code:
Target Table:
USE TPS;
IF OBJECT_ID('dbo.ParticipantResponse') IS NOT NULL
DROP TABLE dbo.ParticipantResponse;
[code]....
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ta
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!#perl
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??
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