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Call Dataset B From Dataset A

I am going to have a dataset which will calculate a date, call it dataset A.  My dataset B which will return all records since that date.

So how can I say something like
where date > datasetb.date or something?
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Fraser_Admin
Asked:
Fraser_Admin
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1 Solution
 
MapleMaleCommented:
Use a stored procedure and temp tables. Dataset A will be the only data set. Then have a veraible,  @Date or something which you use to store your calculated date. So your where clause would look like this:

Declare @Date datetime

Set @Date = (select mydate field from mytableb where mycolumn = mywhereclause)

Select * from mytable
where date > @Date
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MapleMaleCommented:
** your SP, not Where clause would look like this.... sorry! typo!
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Fraser_AdminAuthor Commented:
how do i use a sp with reporting services?
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MapleMaleCommented:
Go to the Data Tab where you would normally type your SQL Query. Type Exec [name of your SP] [parameters if any seperated by commas]. For example:

EXEC [MyEmployeeRankingsSP] @StartDate, @EndDate

The first time you execute that in SSRS, it will create report parameters named after the SP parameters of @StartDate and @EndDate. Run it once and your field names wil be available to add to the report as well.

Note: You could also skip the whole sp idea and change your command type in the data tab to Stored Proc. This will allow you to use SP type SQL code in the query window instead of standard select statements. This all depends on where you would your code to be executed. Do you want to the put processing load on your database engine or on the reporting server? Those are best practice questions you should ask your DBA.
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