If row exists in table update else insert a new row

I have the following stored procedure:

USE [DATABASE]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[InsertNewRow]
      @StartDate DateTime = null

AS
  if @StartDate is null
        set @StartDate = getdate()

Begin

Insert [dbo].[TempPortfolioHistory]

EXEC CITYCRM_MSCRM.dbo.PortfolioHistory @EndDate = @StartDate

End

It adds a new row to the table.

Now the SP is going to be run more than once a day so I need to update the row if there is a row with the same date (first column in the row of the table), otherwise I need to do what the SP does currently.

Any help would be appreciated.
plainwrapnameAsked:
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Scott PletcherSenior DBACommented:
Wasn't sure what type of UPDATE you'd need/want to do, but basically you'll want to use [NOT] EXISTS to test for the row.

ALTER PROCEDURE [dbo].[InsertNewRow]
       @StartDate DateTime = null

AS
SET NOCOUNT ON
IF @StartDate is null
    SET @StartDate = GETDATE()

IF NOT EXISTS(SELECT 1 FROM [dbo].[TempPortfolioHistory] WHERE StartDate = @StartDate)
Begin
    Insert [dbo].[TempPortfolioHistory]
    EXEC CITYCRM_MSCRM.dbo.PortfolioHistory @EndDate = @StartDate
End

GO --end of proc
0

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plainwrapnameAuthor Commented:
Sorry I was not clear.  If the row exists with the same date, I wish to overwrite that row instead of doing the insert.  I guess I need clarification on the use of the UPDATE command.
0
Scott PletcherSenior DBACommented:
The only info directly available from the proc is the @StartDate, and that's used to do the search.  There's no data to "UPDATE".  You might need to change the stored proc to handle updates, or create a separate proc for updates and then you call the proc you need, either INSERT or UPDATE.
0
Vitor MontalvãoMSSQL Senior EngineerCommented:
What returns the SP CITYCRM_MSCRM.dbo.PortfolioHistory ?
0
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