VB
sql = "SELECT * FROM TABLE WHERE AA IN (" '初始化查询字符串
For i = 0 to UBound(Ary) '从0循环到数组最大下标
sql = sql & Ary(i) & "," '将数组中每个值加在查询字符串后面
Next
sql = Left(sql,Len(sql)-1) & ")" '将最后一个逗号换为反括号

C#

static void Main(string[] args)
  {  
    string str = "aaaa,bbbb,cccc,dddd,eeee";

    string[] condititons = str.Split(',');

  
   string ss = "select * from table where aa in (";
   for (int i=0;i<condititons.Length;i++)
   {
    ss = ss+condititons[i]+",";
   }
   //sql.Substring(0,sql.Length-1);
   //ss = ss.Substring(0,sql.Length-1);
   ss = ss.Substring(0,ss.Length-1);
   ss = ss +")";
   Console.WriteLine(ss);

  }
 }