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-  Foxtable(狐表)  (http://foxtable.net/bbs/index.asp)
--  专家坐堂  (http://foxtable.net/bbs/list.asp?boardid=2)
----  多数据库数据查询  (http://foxtable.net/bbs/dispbbs.asp?boardid=2&id=107221)
--  作者：扶风
--  发布时间：2017/9/23 17:53:00
--  多数据库数据查询
Dim cmd1 As New SQLCommand
cmd1.C
cmd1.CommandText ="(S elect [FPrintNo] from {SHProcRptMain} where [FBillNo]=(S elect [FSourceBillNo] from {vwICBill_2} where FBatchNo = \'" & dr("批号") & "\'))"
Dim T1 As New QueryBuilder
T1.TableName = "T1"
T1.S electString = cmd1.CommandText
T1.Build

\'Dim cmd2 As New SQLCommand
\'cmd2.C
\'cmd2.CommandText ="(S elect 数据 from 电容出厂 where 客户料号=tbl.Current("客户对应物料代码") And 打印标记=cmd1)"

老师，2个数据库的内容如何连起来查询？另子查询查出来的结果是数组不唯一，如何处理最后得出惟一值？

S elect 数据 from 电容出厂 where 客户料号=tbl.Current("客户对应物料代码") And 打印标记=(S elect [FPrintNo] from {SHProcRptMain} where [FBillNo]=(S elect [FSourceBillNo] from {vwICBill_2} where FBatchNo = \'" & dr("批号") & "\'))
[此贴子已经被作者于2017/9/23 17:55:45编辑过]
--  作者：扶风
--  发布时间：2017/9/24 9:32:00
--  
Dim g0 As String
Dim g1 As String
Dim cmd1 As New SQLCommand
cmd1.C
cmd1.CommandText ="(S  elect top 5000 [FPrintNo] as [随工单号] from {SHProcRptMain})"
g0 = cmd1.ExecuteScalar()
g1 = Mid(g0,1,Instr(g0,"$")-1)+Right(g0,4)
MessageBox.Show(g1)

请教一下，上述代码，为何会有报错：参数“Length”必须大于或等于 0。？
--  作者：扶风
--  发布时间：2017/9/24 10:24:00
--  
2楼的问题解决了，应该是有空值。筛掉了就可以了。谢谢！


Dim g0 As String
Dim g1 As String
Dim cmd1 As New SQLCommand
cmd1.C
cmd1.CommandText ="(S elect top 5000 [FPrintNo] as [随工单号] from {SHProcRptMain} where [FPrintNo]<>\' \')"
g0 = cmd1.ExecuteScalar()
g1 = Mid(g0,1,Instr(g0,"$")-1)+Right(g0,4)
MessageBox.Show(g1)
--  作者：扶风
--  发布时间：2017/9/24 13:42:00
--  
老师您好，
   多数据源查询统计，我们如下这样做了，但是有报错，烦请您帮忙看看问题可能出在哪里？



Dim dt1 As DataTable
Dim cmd1 As New SQLCommand
cmd1.C
cmd1.CommandText ="S elect top 5000 [FPrintNo] as [随工单号],[FBillNo] as [FCR号] from {SHProcRptMain} where [FPrintNo]<>\' \' group by [FPrintNo],[FBillNo]"
dt1 = cmd1.ExecuteReader

Dim dt2 As DataTable
Dim cmd2 As New SQLCommand
cmd2.C
cmd2.CommandText ="S elect top 5000 [FBatchNo] as [产品批号],[FSourceBillNo] as [FCR号] from {vwICBill_2} where [FSourceBillNo]<>\' \' group by [FBatchNo],[FSourceBillNo]"
dt2 = cmd2.ExecuteReader

Dim dt3 As DataTable
Dim cmd3 As New SQLCommand
cmd3.C
cmd3.CommandText ="S elect [客户料号],[打印标记] as [随工单号],[数据] from {电容出厂} where [打印标记]<>\' \' group by [客户料号],[打印标记],[数据]"
dt3 = cmd3.ExecuteReader

Dim dt4 As DataTable
Dim cmd4 As New SQLCommand
cmd4.C
cmd4.CommandText ="S elect [客户料号],[批号],[实发数量] from {销售出库单}"
dt4 = cmd4.ExecuteReader

Dim hbsql As String ="s elect a.*,(s elect b.[数据] from {dt3} b where a.[客户料号]=b.[客户料号]) as [测试数据],(s elect [打印标记] c.from {dt3} c where a.[客户料号]=c.[客户料号]) as [随工单号],(s elect d.[FSourceBillNo] from {dt2} d where a.[批号]=d.[FBatchNo]) as [产品批号],(S elect e.[购货单位],e.[客户料号],e.[批号],e.[实发数量] from {dt4} e group by [客户料号],[批号]) a"
Dim q As new QueryBuilder
q.TableName = "查询表1"
q.SelectString = hbsql
q.Build
--  作者：有点甜
--  发布时间：2017/9/24 22:03:00
--  

两个数据库，可以直接查询的。你可以用 连接查询join，也可以用union，如

 

http://www.foxtable.com/bbs/dispbbs.asp?BoardID=2&ID=78783&skin=0

 

 

没有你这种语句，参考

 

http://www.foxtable.com/webhelp/scr/2305.htm

 

 
--  作者：扶风
--  发布时间：2017/9/26 17:48:00
--  

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老师，单个字段表格里字符串长度不够怎么办？一直弹窗，是否能解决最大长度的问题？
Dim sql3 As String ="S elect Top 10 * From {电容出厂}"
Dim cmd3 As New SQLCommand
cmd3.C
Dim dt3 As DataTable
Dim cmb3 As WinForm.ComboBox
cmd3.CommandText = sql3
dt3 = cmd3.ExecuteReader()
Dim f3 As New Filler
f3.SourceTable = dt3
f3.DataTable = DataTables("电容出厂") 
f3.Fill()
--  作者：有点甜
--  发布时间：2017/9/26 18:27:00
--  
不能设置成【备注】类型？
--  作者：扶风
--  发布时间：2017/10/25 18:31:00
--  
SQL数据库 A B C
1 2 3
DBA数据库 B C D
2 3 4
FOX整合数据库 A B C D
外部数据表(SQL) 1 2 3 4

老师，如上，如何根据B,C 2个相同字段，将2个不同数据库的表的相关内容整合到FOX的外部数据表SQL表里？
--  作者：有点甜
--  发布时间：2017/10/25 20:43:00
--  

 添加两个数据源，用代码直接去查找表格数据处理

 

http://www.foxtable.com/webhelp/scr/2137.htm

 

 

 

 
--  作者：扶风
--  发布时间：2017/10/27 16:30:00
--  
S ELECT TOP 100 ibe.FBatchNo,i.FBillNo,t3.FFlowCardNo,ib.FBillNo,t4.FCardSort
FROM ICStockBill AS ib INNER JOIN ICStockBillEntry AS ibe ON ib.FInterID=ibe.FInterID
INNER JOIN ICMO AS i ON i.FInterID=ibe.FICMOInterID
INNER join ICShop_FlowCard t3 ON t3.FSourceBillNo=i.FBillNo
inner join (s elect distinct FCardSort,FID from Item999) as t4 on t4.FID=t3.FID

老师，如上这么一长串，Dim sql As String =“如上”
因为窗口小，连成一行容易眼花，能否像上面这样在SQL里分行来写进DIM里面？