Access SQL Scalar Function DAYOFWEEK Problem

[Guest]

I am programming with Access 2003. I have a table named
'testTestDailyWDVolume' with a field 'TermId' as TEXT and another field
'Tran_Dt' as Date/Time, and I tried to use the following SQL statement to
return the 'TermId' field, 'Tran_Dt' field, and a calculated field using the
scalar function DAYOFWEEK()

SELECT [TermId], [Tran_Dt], {fn DAYOFWEEK(Tran_Dt)} AS DayOfWeek
FROM testTestDailyWDVolume;

When I tried to excute it I received a "Malformed Guid. in query expression
' {fn DAYOFWEEK(Tran_Dt)} '." error. I then tried the following,

SELECT [TermId], [Tran_Dt], [fn DAYOFWEEK(Tran_Dt)] AS DayOfWeek
FROM testTestDailyWDVolume;

which then prompted for a parameter (it is treating [fn DAYOFWEEK(Tran_Dt)]
as a parameter and pop up a window for it).

Could anyone tell me what is the correct syntax for the scalar functions?
Here is what I found in the Access help document. I tried to follow the
example but it didn't work.


-----------------------------------------------
ODBC Scalar Functions
Microsoft® Jet SQL supports the use of the ODBC defined syntax for scalar
functions. For example, the query:

SELECT DAILYCLOSE, DAILYCHANGE FROM DAILYQUOTE
WHERE {fn ABS(DAILYCHANGE)} > 5

Would return all rows where the absolute value of the change in the price of
a stock was greater than five.

A subset of the ODBC defined scalar functions is supported. The following
table lists the functions that are supported.

For a description of the arguments and a complete explanation of the escape
syntax for including functions in a SQL statement, see the ODBC documentation.

String Functions
ASCII LENGTH RTRIM
CHAR LOCATE SPACE
CONCAT LTRIM SUBSTRING
LCASE RIGHT UCASE
LEFT


Numeric Functions
ABS FLOOR SIN
ATAN LOG SQRT
CEILING POWER TAN
COS RAND MOD
EXP SIGN


Time & Date Functions
CURDATE DAYOFYEAR MONTH
CURTIME YEAR WEEK
NOW HOUR QUARTER
DAYOFMONTH MINUTE MONTHNAME
DAYOFWEEK SECOND DAYNAME


Data Type Conversion
CONVERT String literals can be converted to the following data types:
SQL_FLOAT, SQL_DOUBLE, SQL_NUMERIC, SQL_INTEGER, SQL_REAL, SQL_SMALLINT,
SQL_VARCHAR and SQL_DATETIME.


See Also
Configuring the Microsoft Jet Database Engine for ODBC Access

-----------------------------------------------------------------

 

[Van T. Dinh]

I don't think you can use the ODBC Scalar Function in Access since (AFAIK)
the expression {fn DAYOFWEEK(Tran_Dt)} needs to be translated / interpreted
by the JET ODBC driver for the JET engine to understand and process the ODBC
Scalar Function DAYOFWEEK. Internally, JET may have a different name for
this function altogether (which is not exposed if JET is used in Access) or
JET may pass this as function call Weekday to VBA for processing.

If you do this in Access, you should use VBA Weekday function in stead.

The {fn DAYOFWEEK(Tran_Dt)} works fine if you pass it through the ODBC
driver. I create a DSN "TestAccessViaODBC" using JET ODBC driver with
"db1.mdb" as the database. I then use the following code in another
database "db2.mdb" to test the Scalar function and the Recordset returns
correct value. Here the quick & dirty code I used to test:

********
Option Compare Database
Option Explicit

Public Sub TestAccessViaODBC()
Dim cnn As ADODB.Connection
Dim rst As ADODB.Recordset
Dim strConn As String
Dim strSQL As String

strConn = "Provider=MSDASQL.1;Persist Security Info=False;" & _
"Data Source=TestAccessViaODBC"
Set cnn = New ADODB.Connection
cnn.ConnectionString = strConn
cnn.Open
MsgBox "Cnn state: " & GetState(cnn.State)

strSQL = "SELECT {fn DAYOFWEEK(Date1)} As DOW FROM Table1"
Set rst = New ADODB.Recordset
rst.Open strSQL, cnn, adOpenForwardOnly, adLockReadOnly, adCmdText
Debug.Print rst.Fields("DOW").Value

On Error Resume Next
rst.Close
cnn.Close
Set rst = Nothing
Set cnn = Nothing

End Sub

Public Function GetState(intState As Integer) As String

Select Case intState
Case adStateClosed
GetState = "adStateClosed"
Case adStateOpen
GetState = "adStateOpen"
End Select

End Function
********

--
HTH
Van T. Dinh
MVP (Access)

I am programming with Access 2003. I have a table named
'testTestDailyWDVolume' with a field 'TermId' as TEXT and another field
'Tran_Dt' as Date/Time, and I tried to use the following SQL statement to
return the 'TermId' field, 'Tran_Dt' field, and a calculated field using
the
scalar function DAYOFWEEK()

SELECT [TermId], [Tran_Dt], {fn DAYOFWEEK(Tran_Dt)} AS DayOfWeek
FROM testTestDailyWDVolume;

When I tried to excute it I received a "Malformed Guid. in query
expression
' {fn DAYOFWEEK(Tran_Dt)} '." error. I then tried the following,

SELECT [TermId], [Tran_Dt], [fn DAYOFWEEK(Tran_Dt)] AS DayOfWeek
FROM testTestDailyWDVolume;

which then prompted for a parameter (it is treating [fn
DAYOFWEEK(Tran_Dt)]
as a parameter and pop up a window for it).

Could anyone tell me what is the correct syntax for the scalar functions?
Here is what I found in the Access help document. I tried to follow the
example but it didn't work.


-----------------------------------------------
ODBC Scalar Functions
Microsoft® Jet SQL supports the use of the ODBC defined syntax for scalar
functions. For example, the query:

SELECT DAILYCLOSE, DAILYCHANGE FROM DAILYQUOTE
WHERE {fn ABS(DAILYCHANGE)} > 5

Would return all rows where the absolute value of the change in the price
of
a stock was greater than five.

A subset of the ODBC defined scalar functions is supported. The following
table lists the functions that are supported.

For a description of the arguments and a complete explanation of the
escape
syntax for including functions in a SQL statement, see the ODBC
documentation.

String Functions
ASCII LENGTH RTRIM
CHAR LOCATE SPACE
CONCAT LTRIM SUBSTRING
LCASE RIGHT UCASE
LEFT


Numeric Functions
ABS FLOOR SIN
ATAN LOG SQRT
CEILING POWER TAN
COS RAND MOD
EXP SIGN


Time & Date Functions
CURDATE DAYOFYEAR MONTH
CURTIME YEAR WEEK
NOW HOUR QUARTER
DAYOFMONTH MINUTE MONTHNAME
DAYOFWEEK SECOND DAYNAME


Data Type Conversion
CONVERT String literals can be converted to the following data types:
SQL_FLOAT, SQL_DOUBLE, SQL_NUMERIC, SQL_INTEGER, SQL_REAL, SQL_SMALLINT,
SQL_VARCHAR and SQL_DATETIME.


See Also
Configuring the Microsoft Jet Database Engine for ODBC Access