how to write a function

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how to write a function

Patrick.I

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Points: 3105
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August 14, 2006 at 5:49 am

#116051

i want to pass datetime to a functon e.g
@startdate,@enddate
the 2 params would look into a table and bring out a column for example "price" for the dates between the 2 dates passed in.
Any ideas?

Viewing 6 posts - 1 through 5 (of 5 total)

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Sergiy SSC Guru Points: 110208 More actions · Answer 1

There is a topic "CREATE FUNCTION" in BOL.

There are some examples down there.

What's not clear for you in this topic?

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Code for TallyGenerator

Patrick.I Hall of Fame Points: 3105 More actions · Answer 2

Yeah went through some tutorials.

Will post back if need some help

Thx

Bose C S SSC Rookie Points: 45 More actions · Answer 3

Try this

CREATE FUNCTION TEST_1 (@SDate DateTime,@EDate DateTime)

RETURNS TABLE

AS

RETURN (SELECT price

FROM X

WHERE Convert(Varchar(12),StartDate,112) BetWeen Convert(Varchar(12),@SDate,112)

And Convert(Varchar(12),@EDate,112)

Sergiy SSC Guru Points: 110208 More actions · Answer 4

Why you need CONVERT?

Just to avoid using index and make this query heavy?

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Code for TallyGenerator

Jeff Moden SSC Guru Points: 1004290 More actions · Answer 5

Better than that, why do you think you need a function at all? *sniff* *sniff* I smell some RBAR coming up

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)