mybatis 动态sql 多表分组查询

废话不多说直接上例子：

    SELECT b.props_and_uses_name as propsAndUsesName,
    COUNT(*) as constructionNumbers, 
    COUNT(b.building_area) as constructionTotalArea
    FROM tb_construction_info c
	LEFT JOIN tb_building_info b
	ON c.cid = b.cid
	 
	
		c.completion_date between #{beginTime,jdbcType=TIMESTAMP} and
		#{endTime,jdbcType=TIMESTAMP}
	
	
		AND c.completion_date > #{beginTime,jdbcType=TIMESTAMP} 
	
	
		AND c.completion_date  < #{endTime,jdbcType=TIMESTAMP} 
	
	
	 	AND c.area_name  = #{areaName,jdbcType=VARCHAR}
	
	
	GROUP BY b.props_and_uses_name
	ORDER BY c.completion_date DESC
	
  

注意点：where 条件一定要放到group by 语句上面否则会报错。

ps：追加一下什么是DESC 什么是ASC

DESC： 降序 从大到小，从高到底

ASC：升序排序，从 小到大，从底到高