ERROR ON:numApprovals =(int)cmd.ExecuteScalar();

Question

public static int AwaitingApprovals()
{
    int numApprovals = 0;
    string sql = "SELECT COUNT(Type) AS OpenforApproval FROM dbo.LeaveRequest 
                  WHERE Type IN (2, 3, 4, 5, 6, 8, 13, 14, 16, 22)
                  GROUP BY MgtApproval HAVING (MgtApproval IS NULL";
    //"SELECT COUNT(EffectiveDate) AS OpenforApproval FROM LeaveRequest 
    // GROUP BY TimeStampApproval HAVING (TimeStampApproval IS NULL)";

    using (cn = new SqlConnection(ConnectionString()))
    {
        cn.Open();
        using (cmd = new SqlCommand(sql, cn))
        {
            cmd.CommandType = CommandType.Text;
            numApprovals = (int)cmd.ExecuteScalar();
        }
    }

    return numApprovals;
}

Answer 1

您的查询似乎不正确.

在开始时,我无法理解群组的需要和你在SQL结束时错过了一个")".