How to make zero if null

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How do I make this a 0 if it returns null? Thanks.

C++

sprintf(queryString, "SELECT (IPType) FROM tblURLIP WHERE IP = '%s'",ipSrc);

Posted 14-Sep-11 16:28pm

Member 7766180

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**`Randor`** · Accepted Answer · 2011-09-14T17:09:00

Solution 1

Hi,

I would personally use a ternary statement:

C++

sprintf(queryString, "SELECT (IPType) FROM tblURLIP WHERE IP = '%s'",NULL == ipSrc?"0":ipSrc);

Best Wishes,
-David Delaune

Posted 14-Sep-11 17:09pm

Randor

Comments

Member 7766180 14-Sep-11 23:16pm

Thank you. Does this give 0 whether IPType is NULL or ipSrc is NULL or both?

[no name] 14-Sep-11 23:33pm

If ipSrc is NULL then "0" is the string that will be written into the format tag: '%s'

Best Wishes,
-David Delaune

Member 7766180 14-Sep-11 23:42pm

Thank You. I'm sorry that I wasn't clear. I will always have an IP. I just what to get the IPType from the database. However sometimes the IP will not be in the database and thats when I want it to return 0.

[no name] 14-Sep-11 23:55pm

The value IPType will be returned by the SQL database. You will need to show more code if you want a C++ answer. If your looking for a SQL answer it could be: "SELECT ISNULL(MAX(IPType), 0) FROM tblURLIP WHERE IP = '%s'"

Best Wishes,
-David Delaune

Member 7766180 15-Sep-11 0:04am

Thats it! SQL Answer. Thank you!

satish_appasani · Accepted Answer · 2011-09-17T03:53:00

Solution 2

I am used to the below solution

SQL

Select COALESCE(IPType,0) From WHERE IP = '%s'

Posted 17-Sep-11 3:53am

satish_appasani

Updated 17-Sep-11 3:55am

v2

Comments

Member 7766180 17-Sep-11 10:47am

Thank You!