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Convert blank date field to null
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De
04/10/2010 09:33:52
Jerry Tovar
Dana Corporation Dana It
Maumee, Ohio, États-Unis
 
 
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Information générale
Forum:
Visual FoxPro
Catégorie:
COM/DCOM et OLE Automation
Titre:
Convert blank date field to null
Versions des environnements
Visual FoxPro:
VFP 9 SP2
Divers
Thread ID:
01483799
Message ID:
01483799
Vues:
170
We have a foxpro dbf file that contains a date field 'date1'. We need to import this dbf to SQL Server using the OLEDB driver. Sometimes the date1 field contains a blank date. We need to convert blank date data into a null. But when we run the following code, any blank date comes back as the date '12/30/1899' instead of a NULL.

How can we convert blank dates into nulls using the following?
OConn = CREATEOBJECT("ADODB.Connection")
OConn.ConnectionString = "provider=vfpoledb.1;;
	data source=c:\\mydata\;Exclusive=false;Nulls=false"
OConn.Open

cSQL = "select id, name, IIF(EMPTY(date1),  null, date1) AS date1 from mytable WHERE id = myid' ORDER BY id"  &&does not work
cSQL = "select id, name, IIF(EMPTY(date1),  {}, date1) AS date1 from mytable WHERE id = myid' ORDER BY id"  &&Date1 = 12/30/1899
oRS = OConn.Execute (cSQL)

oRS.Close
OConn.Close
Thanks,

Jerry
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