SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Best way to handle Null values


Best way to handle Null values

Author
Message
Cheryl McLaughlin-385812
Cheryl McLaughlin-385812
SSC Veteran
SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)

Group: General Forum Members
Points: 266 Visits: 185
I need to write a script that I carry a variable for the order number. However, that field may be null for several records. How do I created a sql statement that knows what to use? Simplified example code:

Declare
@OrdNbr CoNumType

Select order_nbr, field1, field2, field3
from table
where order_nbr = @Ord_nbr

So, if the value @ordNbr is null I need to temporarily add a value like 'xxxxx' so that record is the only one to print when the user hits the print button. If it is not null then use the value in the field.

I did not know if it was possible or if I could somehow use a case statement....any help would be appreciated.
Sean Lange
Sean Lange
SSC Guru
SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)

Group: General Forum Members
Points: 148451 Visits: 18575
where order_nbr = isnull(@Ord_nbr, 'xxxx') maybe????

_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Modens splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
Cheryl McLaughlin-385812
Cheryl McLaughlin-385812
SSC Veteran
SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)SSC Veteran (266 reputation)

Group: General Forum Members
Points: 266 Visits: 185
It works too a point, but it pulls all the records. If I substitute @Ord_Nbr ='12345' the script still pulls all the records and not the record that is = to '12345'
Sean Lange
Sean Lange
SSC Guru
SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)

Group: General Forum Members
Points: 148451 Visits: 18575
Cheryl McLaughlin-385812 (10/11/2012)
It works too a point, but it pulls all the records. If I substitute @Ord_Nbr ='12345' the script still pulls all the records and not the record that is = to '12345'


Do you want all rows where is it either '123345' OR NULL?

That would be something like:

where order_nbr = @Ord_nbr
OR order_nbr is null



_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Modens splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
The Dixie Flatline
The Dixie Flatline
One Orange Chip
One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)

Group: General Forum Members
Points: 28557 Visits: 6919
If I understand you, you want to have a default value to be returned whenever no value is specified.

Select order_nbr, field1, field2, field3
from table
where order_nbr = isnull(@Ord_nbr,'xxxxxx')

__________________________________________________

Against stupidity the gods themselves contend in vain. -- Friedrich Schiller
Stop, children, what's that sound? Everybody look what's going down. -- Stephen Stills
SQLRNNR
SQLRNNR
SSC Guru
SSC Guru (144K reputation)SSC Guru (144K reputation)SSC Guru (144K reputation)SSC Guru (144K reputation)SSC Guru (144K reputation)SSC Guru (144K reputation)SSC Guru (144K reputation)SSC Guru (144K reputation)

Group: General Forum Members
Points: 144315 Visits: 18651
The Dixie Flatline (10/11/2012)
If I understand you, you want to have a default value to be returned whenever no value is specified.

Select order_nbr, field1, field2, field3
from table
where order_nbr = isnull(@Ord_nbr,'xxxxxx')



That's the way I understand it too.

Jason...AKA CirqueDeSQLeil
_______________________________________________
I have given a name to my pain...MCM SQL Server, MVP
SQL RNNR
Posting Performance Based Questions - Gail Shaw
Learn Extended Events

Sean Lange
Sean Lange
SSC Guru
SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)SSC Guru (148K reputation)

Group: General Forum Members
Points: 148451 Visits: 18575
The Dixie Flatline (10/11/2012)
If I understand you, you want to have a default value to be returned whenever no value is specified.

Select order_nbr, field1, field2, field3
from table
where order_nbr = isnull(@Ord_nbr,'xxxxxx')



That is exactly what my response contained but apparently that isn't quite it.

_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Modens splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
The Dixie Flatline
The Dixie Flatline
One Orange Chip
One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)

Group: General Forum Members
Points: 28557 Visits: 6919
I know, Sean. And I can't understand why that isn't it. It would be nice if the OP came back and told us what the final solution to their problem was.

__________________________________________________

Against stupidity the gods themselves contend in vain. -- Friedrich Schiller
Stop, children, what's that sound? Everybody look what's going down. -- Stephen Stills
The Dixie Flatline
The Dixie Flatline
One Orange Chip
One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)One Orange Chip (28K reputation)

Group: General Forum Members
Points: 28557 Visits: 6919
Cheryl McLaughlin-385812 (10/11/2012)
It works too a point, but it pulls all the records. If I substitute @Ord_Nbr ='12345' the script still pulls all the records and not the record that is = to '12345'



This makes me think that the problem lies elsewhere. Perhaps in an OR section of her WHERE clause.

__________________________________________________

Against stupidity the gods themselves contend in vain. -- Friedrich Schiller
Stop, children, what's that sound? Everybody look what's going down. -- Stephen Stills
Luis Cazares
Luis Cazares
SSC Guru
SSC Guru (95K reputation)SSC Guru (95K reputation)SSC Guru (95K reputation)SSC Guru (95K reputation)SSC Guru (95K reputation)SSC Guru (95K reputation)SSC Guru (95K reputation)SSC Guru (95K reputation)

Group: General Forum Members
Points: 95512 Visits: 21205
For what I understood, there's one condition missing in the previous solutions.
Here's my guess (since I have nothing to test on)


Declare
@OrdNbr CoNumType

Select ISNULL( order_nbr, 'xxxxxx') order_nbr, field1, field2, field3
from table
where order_nbr = @Ord_nbr
OR( order_nbr IS NULL AND @Ord_nbr IS NULL)




Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?


How to post data/code on a forum to get the best help: Option 1 / Option 2
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum








































































































































































SQLServerCentral


Search