Vlookup in excel translated in SQL query

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Vlookup in excel translated in SQL query

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dhen21dx
Starting Member

4 Posts

Posted - 2013-10-25 : 07:51:07

Hi guys,

Please help me, is there any sql syntax where it looks like a vlookup formula in excel. i have 2 tables, Table_A as the source of data and Table_B is the looking up of values. Tables_A&B will be display as a result.

James K
Master Smack Fu Yak Hacker

3873 Posts

Posted - 2013-10-25 : 08:33:01

You can join the two tables:

SELECT a.col1, a.col2, a.col3, b.colx, b.coly
FROM TableA as A inner join TableB as b on a.col1 = b.colx

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-10-25 : 08:47:30

No direct equivalent. You can implement functionality using JOIN operation between the tables.

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
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dhen21dx
Starting Member

4 Posts

Posted - 2013-10-25 : 09:04:07

Will i get a result of let say, below example Table_A A1 is my source and im going to look for the value on Table_B B3, the condition is if there is no value to lookup at Table_B B3 then Table_A A1 will still be there and Table_B B3 is blank as a result.

Table_A Table_B
A1 A2 A3 B1 B2 B3 B4

James K
Master Smack Fu Yak Hacker

3873 Posts

Posted - 2013-10-25 : 09:09:30

You should ue LEFT JOIN instead of INNER JOIN in the query that I posted earlier; that will give you the row(s) from the source table (Table A) even when there are not matching rows in the right table (Table B).

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-10-25 : 09:20:50

And for getting approximate value mode equivalent function iof VLOOKUP in T-SQL you might need to use subquery based on OUTER APPLY

like


SELECT *
FROM TableA a
OUTER APPLY (SELECT TOP 1 B3
             FROM TAbleB
             WHERE B1 <= a.A1
             ORDER BY B3 DESC
             )b

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

dhen21dx
Starting Member

4 Posts

Posted - 2013-10-25 : 09:28:22

Thanks a lot.. i got it now.

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