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Simple SQL to update specific columns

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AskSQLTeam
Ask SQLTeam Question

USA
0 Posts

Posted - 08/31/2005 : 07:36:52

Kairn writes "I have created a table and imported data from another table to it. I need to update the existing data with values from another import but only need specific columns and am assuming a stored procedure is the way to go...IF I create a source table as well as destination(?). I have to compare the value in 6 columns to find the matching record in the destination, then update 5 of the other columns where source=dest. Finally, I need to sum, by row, the value in 3 of the columns and update another column to reflect it. All rows are unique in the destination. The source is a duplicate of them. Basically, the rows are identical aside from the values in the columns I want transferred. The rows must remain unique. I am a newbie and have no idea how to do this. Would you please submit a basic outline and I can fill in the rest?

Thank-you very much for your time and expertise,
Kairn"

AjarnMark
SQL Slashing Gunting Master

USA
3246 Posts

Posted - 08/31/2005 : 12:15:35

Okay, here's a template:

UPDATE t1
SET
  t1.Field1 = t2.Field1,
  t1.Field2 = t2.Field2,
  t1.Field3 = (t2.Field3 + t2.Field4 + t2.Field5)
FROM
  DestTable t1
  JOIN SourceTable t2 on t1.PKField = t2.PKField
WHERE 
  t1.Field9 = t2.Field9

---------------------------
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Edited by - AjarnMark on 08/31/2005 12:16:19

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