<if test="startTime != null and startTime != ''"> AND i_DataTime <![CDATA[ >= ]]> #{startTime} </if>
相当于:
AND i_DataTime >= #{startTime}
<if test="startTime != null and startTime != ''"> AND i_DataTime <![CDATA[ >= ]]> #{startTime} </if>
相当于:
AND i_DataTime >= #{startTime}