how to retrieve null value with database

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i have two columns one is having values and second one is null and i want to retrieve data for both columns using where condition please help

Posted 29-Jul-14 20:41pm

tanugarg

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Nirav Prabtani 30-Jul-14 2:46am

What is an issue??

Sharmanuj 30-Jul-14 2:48am

give some more information regarding the desired output

tanugarg 30-Jul-14 2:51am

i have two columns mode_pay and status_mode, mode_pay is having values and status_mode is null so i want to retrieve data from both columns like Select token_no from billentry where mode_pay= 'cash' and status_mode= 'null'

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Abhinav S · Answer 1 · 2014-07-29T20:49:00

Solution 1

You can try

SELECT * FROM myTable WHERE myTable.A = value OR myTable.B is null

An alternate approach is

SELECT * FROM myTable WHERE myTable.A = value 
UNION
SELECT * FROM myTable WHERE myTable.B is null

Posted 29-Jul-14 20:49pm

Abhinav S

Updated 29-Jul-14 20:50pm

v3

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tanugarg 30-Jul-14 2:57am

table is same not diffrent

Abhinav S 30-Jul-14 3:02am

In my examples above, table name is same.