我有三张桌子: - - 订单(给我订单日期) - 订单行项目(使我能够将活动结果链接到订单日期) - 活动项目(给我活动结果)
我正在尝试在图表上绘制结果,并且可以使用以下查询成功为所有结果创建一个数组< = 50 as Passed: -
SELECT
YEAR( od_date ) AS Year,
MONTH( od_date ) AS Month,
test_name,
pd_name,
COUNT( test_result ) AS Passed
FROM tbl_lab_item
INNER JOIN tbl_order_item
ON tbl_order_item.od_item_id = tbl_lab_item.od_item_id
INNER JOIN tbl_order
ON tbl_order.od_id = tbl_order_item.od_id
WHERE tbl_order.od_date >= DATE_SUB(now(), INTERVAL 12 MONTH)
AND test_name = 'Test'
AND pd_name = 'Product'
AND test_result <= 50
AND od_customer_id = '4'
GROUP BY test_name, YEAR(od_date), MONTH(od_date)ASC
我可以使用相同的查询对失败的结果执行类似操作,但选择中的Count(test_result)AS失败,并将WHERE条件更改为&gt;。
如果可能的话,我想在一个查询中完成另外两件事。
首先,我希望能够将通过和失败结合到同一个查询中,这样我就可以获得月份,通过次数,失败次数。
其次,为了在图表上绘制所有这些,我可能需要显示所有月份,即使没有通过,失败或两者都没有结果。根据我对UNION的理解,查询需要具有相同的形状,因此我可以将Null as Failed添加到Pass查询中,反之亦然,但是如何将其合并为一种获取所有月份显示的方法? / p>
我在这里看How to get a count even if there are no results corresponding mysql?以显示所有月份,但是我没有将此信息整合到我的查询中的知识。
希望这一切都有意义吗?
答案 0 :(得分:0)
试试这个:
SELECT YEAR(od_date) AS `Year`, MONTH(od_date) AS `Month`, test_name, pd_name,
SUM(test_result <= 50) AS Passed, SUM(test_result > 50) AS Failes
FROM tbl_lab_item li
INNER JOIN tbl_order_item oi ON oi.od_item_id = li.od_item_id
INNER JOIN tbl_order o ON o.od_id = oi.od_id
WHERE o.od_date >= DATE_SUB(NOW(), INTERVAL 12 MONTH) AND test_name = 'Test' AND
pd_name = 'Product' AND od_customer_id = '4'
GROUP BY test_name, YEAR(od_date), MONTH(od_date) ASC
答案 1 :(得分:0)
对于传球和失败,你可以做到
SELECT
YEAR( od_date ) AS Year,
MONTH( od_date ) AS Month,
test_name,
pd_name,
SUM( IF(test_result <= 50 , 1 , 0) ) AS Passed,
SUM( IF(test_result > 50 , 1 , 0) ) AS Failed
FROM tbl_lab_item
INNER JOIN tbl_order_item
ON tbl_order_item.od_item_id = tbl_lab_item.od_item_id
INNER JOIN tbl_order
ON tbl_order.od_id = tbl_order_item.od_id
WHERE tbl_order.od_date >= DATE_SUB(now(), INTERVAL 12 MONTH)
AND test_name = 'Test'
AND pd_name = 'Product'
AND od_customer_id = '4'
GROUP BY test_name, YEAR(od_date), MONTH(od_date)ASC
从where子句中删除条件并将其放入选择
对于第二部分,创建一个表月
id | month
-------------------
1 | 1
1 | 2
1 | 3
1 | 4
1 | 5
1 | 6
1 | 7
1 | 8
1 | 9
1 | 10
1 | 11
1 | 12
现在加入
SELECT
YEAR( od_date ) AS Year,
MONTH( od_date ) AS Month,
test_name,
pd_name,
SUM( IF(test_result <= 50 , 1 , 0) ) AS Passed,
SUM( IF(test_result > 50 , 1 , 0) ) AS Failed
FROM tbl_lab_item
INNER JOIN tbl_order_item
ON tbl_order_item.od_item_id = tbl_lab_item.od_item_id
INNER JOIN tbl_order
ON tbl_order.od_id = tbl_order_item.od_id
LEFT JOIN month ON months.month = MONTH(tbl_lab_item.od_date)
WHERE tbl_order.od_date >= DATE_SUB(now(), INTERVAL 12 MONTH)
AND test_name = 'Test'
AND pd_name = 'Product'
AND od_customer_id = '4'
GROUP BY test_name, YEAR(od_date), MONTH(od_date)ASC