参数形式

sql

        <if test="params.beginOrderDate != null and params.beginOrderDate != ''">
            <!-- 开始时间检索 -->
            AND DATEDIFF(day,#{params.beginOrderDate},b.order_date) >= 0
        </if>
        <if test="params.endOrderDate != null and params.endOrderDate != ''">
            <!-- 结束时间检索 -->
            AND DATEDIFF(day,#{params.endOrderDate},b.order_date) &lt;= 0
        </if>