check whether record exists in either tables using single line query

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Hello everyone,

I have one odd doubt in sql, the doubt is as described below:

I have two tables A and B, now i have one parameter which i want to check whether the value in the parameter is stored in either of table A or B in a single line query.. (i.e. not two queries for checking value in two tables) how can i achieve this?

Eg. Table A and B

Value = 5

to check whether 5 is present in A or in B or in Both...

Please help me out with it..

Thanks

Posted 15-Sep-14 22:26pm

krunalpanchalN

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Kornfeld Eliyahu Peter 16-Sep-14 4:33am

Have you done anything so far? Please show some effort (search or code)! As is it ain't a question...

2 solutions

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Jitendra Ku. Sahoo · Answer 1 · 2014-09-15T22:50:00

Solution 1

You define another user defined function where you can check above requirement and return a value.
Like 0 - Not exist in any table
1- Exist in Table A
2- Exist in Table B
3- Exist in both table.
Just call this UDF where needed.

Posted 15-Sep-14 22:50pm

Jitendra Ku. Sahoo

shijuse · Answer 2 · 2014-09-16T02:33:00

Solution 2

Hi
Please see the examples

http://stackoverflow.com/questions/18924775/check-for-multiple-tables-existence-using-single-exists-query[^]

Posted 16-Sep-14 2:33am

shijuse