Get data access with hour condititon

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Hi How can i get data from access with time(hour) condition?

What I have tried:

Dim TIME_C = TIME.Text  
'  text=  (09:00)

"SELECT * FROM RAPOR WHERE INVOICETIME > '"& TIME_C &"'

Posted 10-Mar-20 0:33am

Member 14588284

Updated 10-Mar-20 1:10am

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Member 14588284 10-Mar-20 7:27am

i changed my codes....

Dim dtTARIH As DateTime = TARIH.Value
Dim S1 = Strings.Left(SAAT.Text, 2)
Dim S2 = Strings.Right(SAAT.Text, 2)
Dim srg_1 = "SELECT TARIH,SAAT,FISNO,TUTAR FROM ARACTAKIP WHERE PLAKA='" & PLAKA.Text & "' AND TARIH = @ST AND LEFT(SAAT,2) >= " & S1 & " AND MID(SAAT,4,2) >= " & S2 & ""
Dim srg_2 = "SELECT TARIH,SAAT,FISNO,TUTAR FROM ARACTAKIP WHERE PLAKA='" & PLAKA.Text & "' AND TARIH > @ST "
Dim SRG = "SELECT * FROM (" & srg_1 & " UNION ALL " & srg_2 & ") ORDER BY TARIH,SAAT"
Dim SRG1 As New OleDbCommand(srg, cn)
SRG1.Parameters.AddWithValue("@ST", dtTARIH)

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OriginalGriff · Answer 1 · 2020-03-10T01:10:00

First off, never concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Always use Parameterized queries instead.

When you concatenate strings, you cause problems because SQL receives commands like:

SQL

SELECT * FROM MyTable WHERE StreetAddress = 'Baker's Wood'

The quote the user added terminates the string as far as SQL is concerned and you get problems. But it could be worse. If I come along and type this instead: "x';DROP TABLE MyTable;--" Then SQL receives a very different command:

SQL

SELECT * FROM MyTable WHERE StreetAddress = 'x';DROP TABLE MyTable;--'

Which SQL sees as three separate commands:

SQL

SELECT * FROM MyTable WHERE StreetAddress = 'x';

A perfectly valid SELECT

SQL

DROP TABLE MyTable;

A perfectly valid "delete the table" command

SQL

--'

And everything else is a comment.
So it does: selects any matching rows, deletes the table from the DB, and ignores anything else.

So ALWAYS use parameterized queries! Or be prepared to restore your DB from backup frequently. You do take backups regularly, don't you?

The code you show won;t do that, but it's an indicator that the rest of your codee does, and that's very, very dangerous.

Then, don't use a string. Start by looking at exactly what you have stored in INVOICETIME, and what data type it is stored in. Ideally, it'll be a DATETIME or DATETIME2 column - if it isn't, then change your DB so it is; it'll make everything a whole load easier for everything you want to do with it past basic SELECT and INSERT operations.

Then use a DateTime value in your code:

VB

Dim now As DateTime = DateTime.Now
Dim limit As DateTime = now.AddHours(9 - now.Hour)

You can now pass that as a parameter to your SQL query, and compare the values directly.