主题：临时表SQL查询

Dim strsql As String
If values.Length >1 Then
    strsql ="select a.图录号,a.名称,a.作者,a.年代,a.成交价,a.小计,a.买家结算状况,a.买家出帐单日期 ,a.买家付款状况,a.成交状况,a.买方付款,a.竞投牌号,c.姓名 ,a.竞投牌号,b.拍卖会名称 from storeall a inner join auctionall b on a.拍卖会ID=b.拍卖会ID inner join jtdjall c on a.竞投牌号=c.竞投牌号 where a.成交价<> 0 And a.买家结算状况 In('已结算','抵账') and b.拍卖会名称 in(" & s & ") and c.姓名 in(" & name & ")"
Else
    If tb1.text.Trim="" Then
        strsql ="select a.图录号,a.名称,a.作者,a.年代,a.成交价,a.小计,a.买家结算状况,a.买家出帐单日期 ,a.买家付款状况,a.成交状况,a.买方付款,a.竞投牌号,c.姓名 ,a.竞投牌号,b.拍卖会名称 from storeall a inner join auctionall b on a.拍卖会ID=b.拍卖会ID inner join jtdjall c on a.竞投牌号=c.竞投牌号  where a.成交价<> 0 And a.买家结算状况 In('已结算','抵账') and b.拍卖会名称 in(" & s & ") "
    Else
        strsql ="select a.图录号,a.名称,a.作者,a.年代,a.成交价,a.小计,a.买家结算状况,a.买家出帐单日期 ,a.买家付款状况,a.成交状况,a.买方付款,a.竞投牌号,c.姓名 ,a.竞投牌号,b.拍卖会名称 from storeall a inner join auctionall b on a.拍卖会ID=b.拍卖会ID inner join jtdjall c on a.竞投牌号=c.竞投牌号  where a.成交价<> 0 And a.买家结算状况 In('已结算','抵账') and b.拍卖会名称 in(" & s & ") and c.姓名 like '%" & tb1.Text & "%' "
    End If
End If

Dim tem As String=""
Dim cmd As New SQLCommand
cmd.C

Dim dst As Table = Tables("买家结算关联表")
cmd.CommandText=strsql
dst.DataSource = cmd.ExecuteReader()

买家结算关联表是临时表，我上述代码查询不出来数据。sql语句测试过没有问题，是怎么回事？