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| Passing dates as parameters in Delphi |
| Author |
Message |
| GUL |
| |
| Group | : Members |
| Posts | : 3 |
| Joined | : 2007-11-11 |
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| Profile |
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| Posted : 2007-12-09 09:23:55 |
Hello everyone...
How do I pass dates as parameters in Delphi ?
I must select transactions with dates older than MinDate but before MaxDate. I am doing this action:
...
var
vMinDate, vMaxDate: tDateTime;
begin
vMinDate := date - 15;
vMaxDate := date;
qCheques.close;
qCheques.sql.clear;
qCheques.sql.add('select PayeeEntityRefFullName,');
qCheques.sql.add(' TxnDate,');
qCheques.sql.add(' Amount,');
qCheques.sql.add(' RefNumber,');
qCheques.sql.add(' Memo,');
qCheques.sql.add(' TxnNumber');
qCheques.sql.add('from BillPaymentCheck');
qCheques.sql.add('where TxnDate >= :MinDate and TxnDate <= :MaxDate');
qCheques.paramByName('MinDate').asDateTime := vMinDate;
qCheques.paramByName('MaxDate').asDateTime := vMaxDate;
qCheques.open;
...
In this forum I found out that I must use {d 'YYYY-MM-DD'} and tryed it succesfully when I just run the query without parameters. For example:
select TxnDate from BillPaymentCheck where TxnDate >= {d '2007-11-01'} and TxnDate <= {d '2007-11-30'}
That works fine but I need to use parameters to select specific ranges at run time.
What do I need to do ?. Please help.
Best regards.
GUL |
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| Tom |
 |
| Group | : Administrator |
| Posts | : 5510 |
| Joined | : 2006-02-17 |
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| Profile |
|
| Posted : 2007-12-09 22:11:18 |
If you're just wanting 15 days before the current date, QODBC can do it for you instead:
qCheques.sql.add('where TxnDate >= {fn CURDATE()}-15) and TxnDate <= {fn CURDATE()}'); |
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