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	[x] Attachment Details

Banging Head Transitioning from Access Queries to T-SQL in SQL 2005

Zone: SQL Server 2005

Tags: Microsoft, SQL, 2005

In MS Access you build queries upon queries. You can put in parameters so you can pass user or program input into the queries. This where my problem is, building Views upon other Views in SQL with parameters. I know that Views cannot have parameters so you should use Stored Procedures. I am used to building complex queries in Access but I am stuck in SQL. For example I have a list of Employees with Punch In and Out dates with times. So I wrote a stored procedure below. This returns the values I need for the next step. Now I need to take that data (Q1) and do something to it and get (Q2) and then I need to take (Q1) and outer join it to (Q2) and get (Q3). Then I need to take (Q3) and do something to that and get (Q4). This was very easy to do in Access. If I have to construct some long text based solution in a stored procedure I will go nuts. How can I get the initial data I need with parameters and then continue with Views so I can build upon each one?

         
           
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             ********** STORED PROCEDURE **********
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER PROCEDURE [dbo].[uspTmDiff] 
	@DateFrom DateTime = Null, 
	@DateTo DateTime = Null
AS
BEGIN
SET NOCOUNT ON;
	SELECT
	dbo.TimeClock.*,
	DATEPART(yyyy, Dt) * 10000 + DATEPART(mm, Dt) * 100 + DATEPART(dd, Dt) AS YrMnDy
	FROM
	dbo.TimeClock
	WHERE
	(
	(Dt BETWEEN CONVERT(DATETIME, @DateFrom, 102) AND CONVERT(DATETIME, @DateTo, 102))
	AND 
	(EventType=1 OR EventType=2)
	)
	ORDER BY EmpID, Dt
END

           
         

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9.8

Question Stats

Zone: Microsoft

Question Asked By: ascnd

Solution Provided By: chapmandew

Participating Experts: 2

Solution Grade: A

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Open Discussion

Comment by ascnd

One last thing. How do I change the paramter values in the query
select * from dbo.myfun('1/1/2008','2/1/2008')
programmatically?
Otherwise this would be static.

Comment by chapmandew

How are you trying to call it?

Comment by ascnd

By the last query (Q4).

****** Q1 ******
SELECT TmClkID, EmpID, Dt, EventType, Loc, YrMnDy
FROM dbo.fncRAWdataByDate('3/19/2008 00:00:00 AM', '3/19/2008 11:59:59 AM') AS fncRAWdataByDateTable

****** Q2 ******
SELECT EmpID, YrMnDy
FROM dbo.vwEvalData_10
GROUP BY EmpID, YrMnDy
HAVING (COUNT(EmpID) % 2 = 0)

****** Q3 ******
SELECT dbo.vwEvalData_10.*
FROM dbo.vwEvalData_10 INNER JOIN
dbo.vwEvalData_20 ON dbo.vwEvalData_10.EmpID = dbo.vwEvalData_20.EmpID AND dbo.vwEvalData_10.YrMnDy = dbo.vwEvalData_20.YrMnDy

****** Q4 ******
SELECT TOP (100) PERCENT outP.EmpID, outP.Dt, outP.EventType, DATEDIFF(mi, inP.Dt, outP.Dt) AS TmMn
FROM dbo.vwEvalData_30 AS inP INNER JOIN
dbo.vwEvalData_30 AS outP ON inP.EmpID = outP.EmpID AND outP.Dt > inP.Dt LEFT OUTER JOIN
dbo.vwEvalData_30 AS inbetween ON inP.EmpID = inbetween.EmpID AND inbetween.Dt > inP.Dt AND inbetween.Dt < outP.Dt
WHERE (inP.EventType = 1) AND (inbetween.EmpID IS NULL) AND (outP.EventType = 2)
ORDER BY inP.EmpID, inP.Dt

Comment by chapmandew

Ok, so are you needing to use values from fields in other tables to pass into it?

Comment by ascnd

I am creating a report so the user will, via a web interface or MS Access, select the date range and then run the report. Here is the queries again with names:

****** Q1 (dbo.vwEvalData_10) ******
SELECT TmClkID, EmpID, Dt, EventType, Loc, YrMnDy
FROM dbo.fncRAWdataByDate('3/19/2008 00:00:00 AM', '3/19/2008 11:59:59 AM') AS fncRAWdataByDateTable

****** Q2 (dbo.vwEvalData_20) ******
SELECT EmpID, YrMnDy
FROM dbo.vwEvalData_10
GROUP BY EmpID, YrMnDy
HAVING (COUNT(EmpID) % 2 = 0)

****** Q3 (dbo.vwEvalData_30)******
SELECT dbo.vwEvalData_10.*
FROM dbo.vwEvalData_10 INNER JOIN
dbo.vwEvalData_20 ON dbo.vwEvalData_10.EmpID = dbo.vwEvalData_20.EmpID AND dbo.vwEvalData_10.YrMnDy = dbo.vwEvalData_20.YrMnDy

****** Q4 (dbo.vwEvalData_40)******
SELECT TOP (100) PERCENT outP.EmpID, outP.Dt, outP.EventType, DATEDIFF(mi, inP.Dt, outP.Dt) AS TmMn
FROM dbo.vwEvalData_30 AS inP INNER JOIN
dbo.vwEvalData_30 AS outP ON inP.EmpID = outP.EmpID AND outP.Dt > inP.Dt LEFT OUTER JOIN
dbo.vwEvalData_30 AS inbetween ON inP.EmpID = inbetween.EmpID AND inbetween.Dt > inP.Dt AND inbetween.Dt < outP.Dt
WHERE (inP.EventType = 1) AND (inbetween.EmpID IS NULL) AND (outP.EventType = 2)
ORDER BY inP.EmpID, inP.Dt

Comment by chapmandew

How are you getting the date values? Where will they be coming from?

Comment by ascnd

I guess at this point you tell me because I don't know what method or process to do this. If everything was in MS Access then my User Form would have hidden fields that would have the date that the query would read when it ran. Now that I am doing this using an MS Access interface I don't know how I would get these values form the form to the query. I don't know if the SQL statement would take the [Forms]![frm]![DateFrom], if your familar with MS Access.

Comment by chapmandew

Hmm...Id ask another question in the Access zone...I would imagine that you would need to be calling a stored procedure, but not sure.
HTH,
Tim