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| SQL Server 2000 General discussion of Microsoft SQL Server -- for topics that don't fit in one of the more specific SQL Server forums. version 2000 only. There's a new forum for SQL Server 2005. |
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February 23rd, 2005, 04:37 PM
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Converting a Jet query to SQL that uses a function
I an trying to two things:
1. Convert a Jet update query to an SQL 2000 update stored procedure.
2. How to simulate a VBA function that was used in that Jet update query.
Here is the Jet update query:
Code:
UPDATE [T_Schedule_BatchItems]
LEFT JOIN [T_Schedule_ProductionItems]
ON [T_Schedule_BatchItems].OrigID = [T_Schedule_ProductionItems].OrigID
SET [T_Schedule_BatchItems].ItemID = QCntr([T_Schedule_BatchItems].[ItemID],1)
WHERE [T_Schedule_ProductionItems].OrigID Is Null
and here is the VBA function:
Code:
Function QCntr(x, Optional Y As Long) As Long
'Used to count the records in a queary, call SetToZero first to return to 0
If Y = 1 Then ' This tells us to start at one or not.
If IsNull(DMax("[ItemId]", "T-Schedule-ProductionItems")) = False Then
If Cntr > DMax("[ItemId]", "T-Schedule-ProductionItems") Then
Cntr = Cntr + 1
QCntr = Cntr
Else
Cntr = DMax("[ItemId]", "T-Schedule-ProductionItems")
Cntr = Cntr + 1
QCntr = Cntr
End If
Exit Function
End If
ElseIf Y = 2 Then ' put 2 in because we wanted this to run independently for 1 particular query
If IsNull(DMax("[ItemId]", "T-Schedule-ProductionItems")) = False Then '*** found items (NOT NULL) start numbering at DMax + 1
If Cntr > DMax("[ItemId]", "T-Schedule-ProductionItems") Then
Cntr = Cntr + 1
QCntr = Cntr
Else
Cntr = DMax("[ItemId]", "T-Schedule-ProductionItems")
Cntr = Cntr + 1
QCntr = Cntr
End If
Else '*** No items found (NULL) start numbering with 1
Cntr = Cntr + 1
QCntr = Cntr
End If
Else
Cntr = Cntr + 1
QCntr = Cntr
End If
End Function
__________________
Mitch
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February 23rd, 2005, 11:59 PM
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you may want to create some user defined function. You can find this information on books Online, Here is a same
Code:
A. Use a SELECT statement with a simple CASE function
Within a SELECT statement, a simple CASE function allows only an equality check; no other comparisons are made. This example uses the CASE function to alter the display of book categories to make them more understandable.
USE pubs
GO
SELECT Category =
CASE type
WHEN 'popular_comp' THEN 'Popular Computing'
WHEN 'mod_cook' THEN 'Modern Cooking'
WHEN 'business' THEN 'Business'
WHEN 'psychology' THEN 'Psychology'
WHEN 'trad_cook' THEN 'Traditional Cooking'
ELSE 'Not yet categorized'
END,
CAST(title AS varchar(25)) AS 'Shortened Title',
price AS Price
FROM titles
WHERE price IS NOT NULL
ORDER BY type, price
COMPUTE AVG(price) BY type
GO
Jaime E. Maccou
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February 25th, 2005, 11:41 AM
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OK, here is what I have thus far, but I get errors when trying to save it (it says there is an error close to "Case" and "IS") any suggestions?
Code:
CREATE FUNCTION "Function3"
(
/*
@parameter1 datatype = default value,
@parameter2 datatype
*/
)
RETURNS TABLE
AS
RETURN
(
/* sql select statement */
CASE
WHEN Y=1 THEN
(CASE
WHEN (SELECT MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems) IS NULL = False THEN
(CASE
WHEN Cntr>MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems THEN
Cntr=Cntr+1
QCntr=Cntr
Else
Cntr>MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems THEN
Cntr=Cntr+1
QCntr=Cntr
End)
END)
WHEN Y=2 THEN
(CASE
WHEN (SELECT MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems IS NULL) = Flase THEN
(CASE
WHEN Cntr>MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems THEN
Cntr=Cntr+1
QCntr=Cntr
Else
Cntr>MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems THEN
Cntr=Cntr+1
QCntr=Cntr
End)
END)
Else
Cntr = Cntr + 1
QCntr = Cntr
End
Else
Cntr = Cntr + 1
QCntr = Cntr
End
)
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February 25th, 2005, 12:44 PM
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Friend of Wrox
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I modified the above based on some more research, but still gettting syntax errors:
Code:
CREATE FUNCTION "QCntr(@X nvarchar(50), @Y int)"
/*
QCntr(x, Optional Y As Long) As Long: X will be like E152 and Y will either be 1 or 2
*/
RETURNS int /* datatype */
AS
BEGIN
/* sql statement ... */
DECLARE @Cntr as int, @QCntr as int, @MaxItem as int
set @Cntr = 0
set @MaxItem = Execute SELECT MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems
If Y=1
(If @MaxItem IS NOT NULL
(IF @Cntr>@MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
Else
@Cntr>@MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
End)
END)
Else IF Y=2
(If @MaxItem IS NOT NULL
(IF @Cntr>@MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
Else
@Cntr>@MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
End)
END)
Else
@Cntr = @Cntr + 1
@QCntr = @Cntr
End
Else
@Cntr = @Cntr + 1
@QCntr = @Cntr
End
)
RETURN /* value */
END
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February 28th, 2005, 10:28 AM
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I get the same error in an ADP or in SQL Query Analyzer:
Server: Msg 170, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 7
Line 7: Incorrect syntax near 'RETURNS'.
Server: Msg 156, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 13
Incorrect syntax near the keyword 'Execute'.
Server: Msg 156, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 15
Incorrect syntax near the keyword 'If'.
Server: Msg 156, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 16
Incorrect syntax near the keyword 'IF'.
Server: Msg 170, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 17
Line 17: Incorrect syntax near '@Cntr'.
Server: Msg 156, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 26
Incorrect syntax near the keyword 'If'.
Server: Msg 156, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 27
Incorrect syntax near the keyword 'IF'.
Server: Msg 170, Level 15, State 1, Procedure QCntr(@X nvarchar(50), @Y int), Line 28
Line 28: Incorrect syntax near '@Cntr'.
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February 28th, 2005, 12:33 PM
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Friend of Wrox
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Ok, I've gotten rid of most of the errors, but still get these two:
Code:
Server: Msg 170, Level 15, State 1, Procedure FN_QCntr, Line 24
Line 24: Incorrect syntax near '@Cntr'.
Server: Msg 170, Level 15, State 1, Procedure FN_QCntr, Line 38
Line 38: Incorrect syntax near '@Cntr'.
Here is my updated code:
Code:
CREATE FUNCTION "FN_QCntr"
/*
'Used to count the records in a queary,
QCntr(x, Optional Y As Long) As Long: X will be like E152 and Y will either be 1 or 2
*/
(@X nvarchar(50), @Y int)
RETURNS int /* datatype */
AS
BEGIN
/* sql statement ... */
DECLARE @Cntr as int, @QCntr as int, @MaxItem as int
set @Cntr = 0
set @MaxItem = Go SELECT MAX(ItemID) AS Expr1 FROM T_Schedule_ProductionItems
IF @Y=1
If @MaxItem IS NOT NULL --found items (NOT NULL) start numbering at DMax + 1
--begin
IF @Cntr > @MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
Else
@Cntr>@MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
Else IF @Y=2 -- put 2 in because we wanted this to run independently for 1 particular query
If @MaxItem IS NOT NULL
IF @Cntr > @MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
Else
@Cntr>@MaxItem
@Cntr=@Cntr+1
@QCntr=@Cntr
Else --No items found (NULL) start numbering with 1
@Cntr = @Cntr + 1
@QCntr = @Cntr
Else
@Cntr = @Cntr + 1
@QCntr = @Cntr
End
)
RETURN @QCntr /* value */
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