数据库查询中的特殊字符的问题

　　在进行数据库的查询时，会经常遇到这样的情况：例如想在一个用户数据库中查询他的用户名和他的密码，但恰好该用户使用的名字和密码中有特殊的字符，例如单引号，“|”号，双引号或者连字符“&”。例如他的名字是1"test，密码是A|&900这时当你执行以下的查询语句时，肯定会报错：SQL = "SELECT * FROM SecurityLevel WHERE UID="" & UserID & """SQL = SQL & " AND PWD="" & Password & """ 因为你的SQL将会是这样：SELECT * FROM SecurityLevel WHERE UID="1"test" AND PWD="A|&900" 在SQL中，"|"为分割字段用的，显然会出错了。现在提供下面的几个函数 专门用来处理这些头疼的东西：Function ReplaceStr (TextIn, ByVal SearchStr As String, _ByVal Replacement As String, _ByVal CompMode As Integer)　Dim WorkText As String, Pointer As Integer　If IsNull(TextIn) Then　　ReplaceStr = Null　Else　　WorkText = TextIn　　Pointer = InStr(1, WorkText, SearchStr, CompMode)　　Do While Pointer > 0　　　WorkText = Left(WorkText, Pointer - 1) & Replacement & _　　　Mid(WorkText, Pointer Len(SearchStr))　　　Pointer = InStr(Pointer Len(Replacement), WorkText, SearchStr, CompMode)　　Loop　　ReplaceStr = WorkText　End IfEnd FunctionFunction SQLFixup(TextIn)　SQLFixup = ReplaceStr(TextIn, """, """", 0)End FunctionFunction JetSQLFixup(TextIn)　Dim Temp　Temp = ReplaceStr(TextIn, """, """", 0)　JetSQLFixup = ReplaceStr(Temp, "|", "" & chr(124) & "", 0)End FunctionFunction FindFirstFixup(TextIn)　Dim Temp　Temp = ReplaceStr(TextIn, """, "" & chr(39) & "", 0)　FindFirstFixup = ReplaceStr(Temp, "|", "" & chr(124) & "", 0)End Function 有了上面几个函数后，当你在执行一个sql前，请先使用：SQL = "SELECT * FROM SecurityLevel WHERE UID="" & SQLFixup(UserID) & """SQL = SQL & " AND PWD="" & SQLFixup(Password) & """