執行以下c＃代碼時出錯

Question

我曾嘗試使用以下代碼刪除表中的一行，但出現錯誤。

{System.Data.OleDb.OleDbException: Missing), ], or Item in query expression 
'[CompanyID] not in (Select [CompanyID] from EmployeeDetails 
where [CompanyID] = @cmpID'. 

這裏是我的代碼：

int companyID = _cmpDetailsList[i].CompanyID;   
OleDbCommand upcmd = new OleDbCommand(
    "delete * from CompanyDetails where [CompanyID] not in " + 
    "(Select [CompanyID] from EmployeeDetails where [CompanyID] = @cmpID", conn); 
conn.Open(); 
upcmd.Parameters.AddWithValue("@cmpID", companyID); 
upcmd.ExecuteNonQuery(); 
conn.Close(); 

我以這種格式

OleDbCommand upcmd = new OleDbCommand("delete * from CompanyDetails where [CompanyID]= @cmpID and not in (Select [CompanyID] from EmployeeDetails where [CompanyID] = @cmpID)", conn); 

修改命令我得到了以下錯誤

System.Data.OleDb.OleDbException ：查詢表達式'[CompanyID] = @cmpID且不在（從EmployeeDet中選擇[CompanyID]中的語法錯誤（缺少運算符）其中[CompanyID] = @cmpID）'。

請解決它

Answer 1

如果你讀了錯誤，它會告訴你這個問題：

OleDbCommand upcmd = new OleDbCommand(
"delete from CompanyDetails where [CompanyID] not in " + 
"(Select [CompanyID] from EmployeeDetails where [CompanyID] = @cmpID)", conn); 

你有一個(但沒有在最後的匹配)。