sql query to add two columns from two table..

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Suppose we have two columns, column1 and column2 from table1 and table2 respectfully. What is the SQL Query to add column1 and column2 and set the value in column1?

Help me please.

Posted 26-Feb-11 11:41am

codegeekalpha

Updated 26-Feb-11 11:47am

Henry Minute

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_Ashish · Answer 1 · 2011-02-26T23:50:00

Solution 3

update table1 set column1 = column1 + column2 
from table2 where
table2.id = table1.id

Posted 26-Feb-11 23:50pm

_Ashish

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Espen Harlinn 28-Feb-11 11:44am

Something along this lines, my 5 - I'd use something like
Select column1 + column2 as newValue
from table1, table2
where table2.id = table1.id
to check that I had my "where" clause right :)

_Ashish 28-Feb-11 12:29pm

Thanks Espen you are absolutely right, even i use this query always before final Update

Albin Abel · Answer 2 · 2011-02-26T12:02:00

Solution 1

Look at Union query

http://www.w3schools.com/sql/sql_union.asp[^]

Posted 26-Feb-11 12:02pm

Albin Abel

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codegeekalpha 26-Feb-11 18:12pm

union query is just to join.. i neet arthematic addtion of two colums and then setting the value in one colume.. I.e addin Columbalance(in table1)+columndeposit(in table 2)=columbalnace(in table1)

Sandeep Mewara · Answer 3 · 2011-02-26T22:56:00

Suppose we have two columns, column1 and column2 from table1 and table2 respectfully. What is the SQL Query to add column1 and column2 and set the value in column1?

You would need to write a SP and use Cursors to loop through all the rows of the table to do it.

Other option can be to use Table Valued Function to do the same.