☆1.    q.ques_group传入为null或''的时候不查询此条件：

          value = "SELECT *             FROM question q WHERE  1=1 AND (q.ques_group = :quesGroup or :quesGroup is null or :quesGroup='') AND q.type = :type",

        1： (q.ques_group = :quesGroup or :quesGroup is null or :quesGroup='')

        2： (q.ques_group = ISNULL(:quesGroup, q.ques_group) OR q.ques_group = (CASE WHEN :quesGroup = '' THEN q.ques_group ELSE :quesGroup END)) :分解：

            SELECT *             FROM question q WHERE

            1=1 AND (q.ques_group = IFNULL(:quesGroup, q.ques_group) OR q.ques_group = (CASE WHEN :quesGroup = '' THEN q.ques_group ELSE :quesGroup END))

            AND q.type = :type",

        3：WHERE       (@AgentID='') OR (@AgentID<>'' AND  A.AgentID = @AgentID)