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dynamorevy
Starting Member
6 Posts |
 Posted - 2006-12-01 : 03:30:03
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| Many thanks in advance for anyone that can help me write this qry:To summarise - we have a database that links components to services. Components can have a 1 to many relationship with services. The components are held in a table:dbo.componentscompID compName compType1 srv1 12 srv2 13 srv3 1We also have a services table which hold all our various services we own:dbo.servicessvcID svcName1052 svc11053 svc21054 svc3We then have a tbl that shows the links between components and servicesdbo.compUsessvcID compID1052 3101052 4001053 1221256 134I would like to find out through the qry what components are currently NOT linked to a service. This will allow me to find out what components have no relationships. This is in SQL2005.Have I explained this well enough? Any help would be much appreciated! |
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harsh_athalye
Master Smack Fu Yak Hacker
5581 Posts |
Posted - 2006-12-01 : 03:40:13
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| [code]Select c.CompID, c.CompName, c.CompTypefrom components cLEFT JOIN compUses uon c.compID = u.compIDWhere u.compID Is NULL[/code]Harsh AthalyeIndia."Nothing is Impossible" |
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madhivanan
Premature Yak Congratulator
22864 Posts |
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Help to write a qry in SQL2005