我目前有一个函数,它在Access 2010中使用SQL语句将记录插入到表中。
Sub btnSubmit_Click()
dim strSQL as string
strSQL="INSERT INTO tblMaster (PeriodID,ClassID,ChildID,SubjectID,LevelID) VALUES (" & cboPeriod & "," & cboClass & "," & cboName & "," & tbSubject1 & "," & cboLevel1 & ")"
CurrentDB.Execute strSQL
End Sub
我首先要做的是检查'tblMaster'是否已经有相同的记录。
我将如何实现这一目标?
答案 0 :(得分:1)
我想象在最坏的情况下会有一些唯一的标识符;以下应该有效。
Sub btnSubmit_Click()
Dim strSQL as string
strSQL = "INSERT INTO tblMaster (PeriodID, ClassID, ChildID, SubjectID, LevelID) VALUES (" & _
cboPeriod & ", " & cboClass & ", " & cboName & ", " & tbSubject1 & ", " & cboLevel1 & ")"
If DCount("*", "tblMaster", "PeriodID = " & cboPeriod & " AND " & _
"ClassID = " & cboClass & " AND " & _
"ChildID = " & cboName & " AND " & _
"SubjectID = " & tbSubject1 & " AND " & _
"LevelID = " & cboLevel1) = 0 Then
CurrentDB.Execute strSQL
Else
MsgBox "A Record already exists for this information.", vbOKOnly, "No Records Added."
End If
End Sub
答案 1 :(得分:0)
您可以使用其他选择语句检查该记录是否存在。