Question

我有以下查询：

SELECT pr_production_units_details.id AS idProductionUnit, 
pr_production_units_details.production_units_detail AS productionUnit,
IF(pr_varieties.variety IS NULL, 'SIN SEMBRAR O ERR', pr_varieties.variety) 
AS variety
FROM pr_production_units_details
LEFT JOIN 

(SELECT MAX(sw_sowing.id) AS ids, sw_sowing.id_production_unit_detail,  
sw_sowing.id_variety
FROM sw_sowing
WHERE sw_sowing.status != 0
AND sw_sowing.id_tenant = 1
AND YEARWEEK(sw_sowing.date) <= 201741
GROUP BY sw_sowing.id_production_unit_detail, id_variety
ORDER BY ids DESC
) AS sw 

ON pr_production_units_details.id = sw.id_production_unit_detail
INNER JOIN pr_varieties ON sw.id_variety = pr_varieties.id
WHERE pr_production_units_details.id_grouper_detail = 1
AND pr_production_units_details.status = 100
AND pr_production_units_details.id_tenant = 1
GROUP BY pr_production_units_details.id

给我带来了以下结果：

------------------------------------------------
  idProductionUnit | productionUnit |  variety
------------------------------------------------
        1          |        1       |   YELLOW 
------------------------------------------------
        2          |        2       |   YELLOW 
------------------------------------------------
        3          |        3       |   YELLOW 
------------------------------------------------

上面的结果很好，但每次运行查询时，品种列都会更改其值，即：

------------------------------------------------
  idProductionUnit | productionUnit |  variety
------------------------------------------------
        1          |        1       |   YELLOW 
------------------------------------------------
        2          |        2       |   BLUE 
------------------------------------------------
        3          |        3       |   YELLOW 
------------------------------------------------

它也给了我以下结果：

------------------------------------------------
  idProductionUnit | productionUnit |  variety
------------------------------------------------
        1          |        1       |   BLUE 
------------------------------------------------
        2          |        2       |   YELLOW 
------------------------------------------------
        3          |        3       |   YELLOW 
------------------------------------------------

我不知道是否必须由ORDER BY或GROUP BY看到它，但我还没有理解，因为它向我展示了不同的数据。

我希望你能帮助我！

谢谢！

Answer 1

我可以解决我的问题，我改变了这样的查询：

SELECT  pr_production_units_details.id AS idProductionUnit, pr_production_units_details.production_units_detail AS  productionUnit, pr_varieties.variety
FROM (SELECT MAX(sw_sowing.id) AS id
            FROM sw_sowing
            WHERE sw_sowing.status != 0
            AND sw_sowing.id_tenant = 1
            AND YEARWEEK(sw_sowing.date) <= 201741
            GROUP BY  sw_sowing.id_production_unit_detail
)AS sw
INNER JOIN sw_sowing ON sw_sowing.id = sw.id
INNER JOIN pr_production_units_details ON pr_production_units_details.id = sw_sowing.id_production_unit_detail
INNER JOIN pr_varieties ON pr_varieties.id = sw_sowing.id_variety
WHERE sw_sowing.status != 0 
AND sw_sowing.id_tenant =1
AND pr_production_units_details.id_grouper_detail = 13
GROUP BY pr_production_units_details.id, variety

我按照有关评论的说明进行操作，我的错误仅根据Mysql版本显示我

感谢您的帮助！

每次在Mysql中运行时，Query都会显示不同的数据

1 个答案: