How to Simulate SQL Server's Enumerations

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How to Simulate SQL Server's Enumerations

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AskSQLTeam
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Posted - 2006-06-13 : 08:52:03

Mike writes "Here is a boiled down example of a more complex scenario:

=====================================
declare @dateType varchar(16)
set @dateType = 'wk'

select datepart (@dateType, getdate())
=====================================

but it results in:

=====================================
Server: Msg 1023, Level 15, State 3, Line 4
Invalid parameter 1 specified for datepart.
=====================================

Of course running the same select statement using what SQL Server is expecting -wk- as the first parameter works fine.

So how can I cast/convert my string into this enumeration or in general any enumerations in SQL Server?

I'm running SQL 2000/2005 on Windows 2003."

madhivanan
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22864 Posts

Posted - 2006-06-13 : 09:05:36

1 Use Dynamic SQL

declare @dateType varchar(16)
set @dateType = 'wk'

exec('select datepart ('+@dateType+', getdate())')

2 Use if condition
declare @dateType varchar(16)
set @dateType = 'wk'

if @dateType='wk'
select datepart (wk, getdate())

Second method is advisible to use

Madhivanan

Failing to plan is Planning to fail

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