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SQL Loop help (temp tables etc)

Posted on 2013-01-17
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Last Modified: 2013-01-18
I have a main table and a small lookup table.

Im trying to get the ids from my streets table to my benchmarks table.

So in streets I have 2 columns.

Id
Streetname

In Benchmarks I have a streetid field that I want to contain the value of the Id column in streets table.  I need to use Streets.Streetname and Benchmarks.Street1 as the where.

So in psuedo code:  
update dbo.benchmarks set dbo.benchmkarks.street1id = dbo.streets.id where dbo.benchmarks.street1id = dbo.streets.streetname.

Obviously this will take a loop to read in all the rows in streets and then do the processing unfortunately ive never grasped fully how to get this right in sql.

Thanks in advance and please view the attachment that shows my columns.

my db schema
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Question by:rochestermn
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3 Comments
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 38789749
update dbo.benchmarks
set dbo.benchmkarks.street1id = dbo.streets.id
FROM dbo.streets
where dbo.benchmarks.street1id = dbo.streets.streetname.
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LVL 39

Accepted Solution

by:
appari earned 2000 total points
ID: 38790074
try this

update A
set street1id = B.id
FROM dbo.benchmarks  A join  dbo.streets B
on A.street1 = B.streetname
0
 

Author Closing Comment

by:rochestermn
ID: 38793314
Worked perfectly!  Guess I didnt need a temp table after all.
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