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AskSQLTeam
Ask SQLTeam Question
0 Posts |
 Posted - 2001-04-29 : 22:51:46
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Felipe Amorim writes "I've found in a good ASP site the following code that should return a certain number of random records...
here's the code:
Dim objConn
Dim objRst
Dim strSQL
Dim strConnection
Dim str
Dim str1
Dim cnt
Dim cnt1
Dim rndMax
Dim RndNumber
strConnection="driver={Microsoft Access Driver (*.mdb)};dbq=" & server.mappath("testdb.mdb")
strSQL = "SELECT id FROM tblDates"
set objConn = Server.CreateObject("ADODB.Connection")
Set objRst = Server.CreateObject("ADODB.Recordset")
objConn.Open strConnection
set objRst.ActiveConnection = objConn
objRst.LockType = adLockOptimistic
objRst.CursorType = adOpenKeySet
objRst.Open strSQL
objRst.MoveLast
cnt = objRst.RecordCount
cnt1 = cnt
rndMax = cnt
If CInt(Request.Form("maxNumber")) < cnt Then
cnt1 = CInt(Request.Form("maxNumber"))
End If
str = ","
str1 = ","
Do Until cnt1 = 0
Randomize
RndNumber = Int(Rnd * rndMax)
If (InStr(1, str1, "," & RndNumber & "," ) = 0) Then
str1 = str1 & RndNumber & ","
cnt1 = cnt1 - 1
objRst.MoveFirst
objRst.Move RndNumber
str = str & objRst("id") & ","
End If
Loop
objRst.Close
Set objRst = Nothing
sql = "SELECT * FROM tblDates WHERE (((InStr(1,'" & str & "',(',' & [id] & ',')))<>0)) ORDER BY Rnd(IsNull([id])*0+1)"
Set objRst = Server.CreateObject("ADODB.Recordset")
set objRst.ActiveConnection = objConn
objRst.LockType = adLockOptimistic
objRst.CursorType = adOpenKeySet
objRst.Open sql
Content
objRSt.Close
set objRst = Nothing
objConn.CLose
Set objConn = Nothing
but in SQL 2000 this doesn't work, the InStr function is not reconizated....
does anyone nows another way?" |
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Using the function InStr in queries