BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Nulls in SQL Insert statements          BorlandTalk.com Forum Index -> Delphi Databases (SQL Servers) View previous topic :: View next topic   Author Message Matthew Pascoe Guest Posted: Mon Aug 09, 2004 5:28 am    Post subject: Nulls in SQL Insert statements Hi, I am writing a stored procedure to insert a record into a table. It is possible that several of the fields will have either an integer value or be left as null, depending upon the values of the input parameters. Is there anyway to cater for this in my SQL insert statement. The only way I can think to get around it is to have an if statement with different SQL's depending on which fields are to be left as nulls and which fields are to receive values. This stored procedure is to be called from within another stored procedure. Any help is greatly appreciated. Thanks Matthew Back to top Bill Todd (TeamB) Guest Posted: Mon Aug 09, 2004 12:43 pm    Post subject: Re: Nulls in SQL Insert statements Call the parameter's Clear method to set the parameter to null. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Craig Stuntz [TeamB] Guest Posted: Mon Aug 09, 2004 1:15 pm    Post subject: Re: Nulls in SQL Insert statements Bill Todd (TeamB) wrote: Quote: Call the parameter's Clear method to set the parameter to null. ...and then manually assign TParam.Bound := TRUE. -Craig -- Craig Stuntz [TeamB] . Vertex Systems Corp. . Columbus, OH Delphi/InterBase Weblog : http://blogs.teamb.com/craigstuntz How to ask questions the smart way: http://www.catb.org/~esr/faqs/smart-questions.html Back to top Matthew Pascoe Guest Posted: Tue Aug 10, 2004 12:28 am    Post subject: Re: Nulls in SQL Insert statements Bill, Thanks for your reply. I will be calling the SP from another SP, not directly from my application. How do I go about using the Clear method from within a SP? Regards, Matthew "Bill Todd (TeamB)" <no (AT) no (DOT) com> wrote Quote: Call the parameter's Clear method to set the parameter to null. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Bill Todd (TeamB) Guest Posted: Tue Aug 10, 2004 3:34 am    Post subject: Re: Nulls in SQL Insert statements On Tue, 10 Aug 2004 10:28:10 +1000, "Matthew Pascoe" <mpascoe (AT) stocklogix (DOT) com.au> wrote: Quote: How do I go about using the Clear method from within a SP? You don't. Just assign NULL to the variable you are passing as a parameter. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Arthur Hoornweg Guest Posted: Tue Aug 10, 2004 10:31 am    Post subject: Re: Nulls in SQL Insert statements What's the problem? INSERT INTO mytable (name,surname,age) values ('SMITH', 'JOHN', NULL); Alter mytable set age=NULL where name='SMITH' -- Arthur Hoornweg (please remove the ".net" from my e-mail address) Back to top Matthew Pascoe Guest Posted: Tue Aug 10, 2004 10:51 pm    Post subject: Re: Nulls in SQL Insert statements Bill, Ah, that is what I was missing. I am converting some Delphi code to SP's and didn't release you could assign a null value to a variable (as it can't be done in Delphi). That has solved my problem. Matthew "Bill Todd (TeamB)" <no (AT) no (DOT) com> wrote Quote: On Tue, 10 Aug 2004 10:28:10 +1000, "Matthew Pascoe" [email]mpascoe (AT) stocklogix (DOT) com.au[/email]> wrote: How do I go about using the Clear method from within a SP? You don't. Just assign NULL to the variable you are passing as a parameter. -- Bill (TeamB) (TeamB cannot respond to questions received via email) Back to top Matthew Pascoe Guest Posted: Tue Aug 10, 2004 10:52 pm    Post subject: Re: Nulls in SQL Insert statements Craig, Thanks for your reply. Matthew "Craig Stuntz [TeamB]" <cstuntz (AT) nospam (DOT) please [a.k.a. vertexsoftware.com]> wrote in message news:411778d8 (AT) newsgroups (DOT) borland.com... Quote: Bill Todd (TeamB) wrote: Call the parameter's Clear method to set the parameter to null. ...and then manually assign TParam.Bound := TRUE. -Craig -- Craig Stuntz [TeamB] . Vertex Systems Corp. . Columbus, OH Delphi/InterBase Weblog : http://blogs.teamb.com/craigstuntz How to ask questions the smart way: http://www.catb.org/~esr/faqs/smart-questions.html Back to top Matthew Pascoe Guest Posted: Tue Aug 10, 2004 10:52 pm    Post subject: Re: Nulls in SQL Insert statements Arthur, Thanks for your reply. Matthew "Arthur Hoornweg" <arthur.hoornweg (AT) wanadoo (DOT) nl.net> wrote Quote: What's the problem? 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