我正在使用带有内连接和左连接的查询从 3 个表中获取数据。我还想通过使用 matname 来使用组。因为会有来自同一个 matname 的多个输出。我想得到它们的总和。
表 tbl_sales
+------------+--------------+---------------+----------+--------+---------+
| company | customer | date | material | matgrp | qty_ach |
+------------+--------------+---------------+----------+--------+---------+
| 2100 | 30000002 | 2017-01-10 | 2000012 | FG0001 | 2 |
| 2200 | 30000002 | 2017-01-10 | 2000012 | FG0001 | 4 |
| 2100 | 30000003 | 2017-01-10 | 2000011 | FG0001 | 5 |
| 2100 | 30000002 | 2017-01-11 | 2000024 | FG0001 | 4 |
| 2300 | 30000004 | 2017-01-11 | 2000010 | FG0001 | 1 |
+------------+--------------+---------------+----------+--------+---------+
表 tbl_mas_material
+---------+--------------+--------+
| matnum | matname | matgrp |
+---------+--------------+--------+
| 2000011 | name1 | FG0001 |
| 2000012 | name2 | FG0001 |
| 2000013 | name3 | FG0001 |
| 2000014 | name4 | FG0001 |
| 2000015 | name5 | FG0001 |
+---------+--------------+--------+
表 tbl_mas_customer
+---------+----------+--------+
| customer| rep | namez |
+---------+----------+--------+
| 2000011 | 501 | ddd |
| 2000012 | 502 | bbb |
| 2000013 | 501 | zzz |
| 2000014 | 501 | qqq |
| 2000015 | 503 | ttt |
+---------+----------+--------+
我想获取特定代表已售出的特定 Material 组 (matgrp) 及其名称 (matname) 的数量 (qty_ach)。
这是我使用的查询。这给了我正确的输出。
SELECT tbl_mas_material.matname, tbl_sales.qty_ach
FROM salesforce.tbl_sales
inner join salesforce.tbl_mas_customer on salesforce.tbl_mas_customer.customer = salesforce.tbl_sales.customer
left join salesforce.tbl_mas_material on salesforce.tbl_mas_material.matnum = salesforce.tbl_sales.material
where salesforce.tbl_sales.matgrp = 'FG0001'
and DATE_FORMAT(date, '%Y-%m') = '2017-01'
and salesforce.tbl_mas_customer.rep = '501'
但我想使用 matname 按它们分组，因为我想使用相同名称的 Material 获得 qty_ach 的总和。但是，如果我最后按 matname 添加组，它不会给我正确的输出以及 qty_ach 的总和
没有分组依据
{"feed":[
{"matname":"3.00-10 4PR SECURA NEO TL CEAT","qty_ach":"5"},
{"matname":"3.50-10 04PR SECURA NEO CEAT","qty_ach":"2"},
{"matname":"3.00-18 6PR SECURA ZOOM TL","qty_ach":"1"},
{"matname":"2.75-17 04PR SECURA ZOOM CEAT (F)","qty_ach":"17"},
{"matname":"3.00-18 06PR SECURA SPORT CEAT (R)","qty_ach":"3"},
{"matname":"100\/90-18 GRIPP TL CEAT","qty_ach":"5"},
{"matname":"100\/90-17 GRIPP TL CEAT","qty_ach":"6"},
{"matname":"2.75-18 04PR SECURA ZOOM (F)","qty_ach":"-11"},
{"matname":"3.00-17 06PR SECURA ZOOM CEAT (R)","qty_ach":"-11"},
{"matname":"3.00-17 06PR SECURA ZOOM CEAT (R)","qty_ach":"11"},
{"matname":"3.00-17 04PR GRIPP","qty_ach":"33"},
{"matname":null,"qty_ach":"22"},
{"matname":"3.00-17 06PR SECURA ZOOM CEAT (R)","qty_ach":"11"},
{"matname":"2.50-17 04PR SECURA SPORT CEAT (R)","qty_ach":"4"},
{"matname":"2.50-17 04PR SECURA ZOOM FX (F)","qty_ach":"3"},
{"matname":"2.75-17 04PR SECURA ZOOM CEAT (F)","qty_ach":"2"},
{"matname":"3.00-17 06PR SECURA ZOOM CEAT (R)","qty_ach":"22"},
{"matname":"3.00-17 06PR SECURA ZOOM CEAT (R)","qty_ach":"6"}
{"matname":"100\/90-17 SECURA ZOOM CEAT TL","qty_ach":"22"},
{"matname":"100\/90-17 SECURA ZOOM CEAT TL","qty_ach":"5"},
{"matname":"100\/90-17 SECURA ZOOM CEAT TL","qty_ach":"6"},
{"matname":"100\/90-18 6PR SECURA ZOOM TL","qty_ach":"12"},
{"matname":"3.00-18 6PR SECURA ZOOM TL","qty_ach":"4"},
{"matname":"2.75-14 06PR SECURA 275","qty_ach":"2"},
{"matname":"2.75-14 06PR SECURA 275","qty_ach":"6"},
{"matname":"2.75-17 04PR SECURA ZOOM TL","qty_ach":"10"},
{"matname":"2.75-17 04PR SECURA ZOOM TL","qty_ach":"3"},
{"matname":"2.75-17 04PR SECURA ZOOM TL","qty_ach":"27"},
{"matname":"2.75-17 04PR SECURA ZOOM TL","qty_ach":"27"},
{"matname":"3.00-17 04PR GRIPP","qty_ach":"33"},
{"matname":"3.00-17 04PR GRIPP","qty_ach":"11"},
{"matname":"100\/90-18 GRIPP TL CEAT","qty_ach":"5"},
{"matname":"120\/80-17 SECURA PULSE","qty_ach":"6"},
{"matname":"100\/90-17 GRIPP TL CEAT","qty_ach":"5"},
{"matname":null,"qty_ach":"22"},
{"matname":null,"qty_ach":"38"},
{"matname":null,"qty_ach":"11"},
{"matname":null,"qty_ach":"11"},
{"matname":null,"qty_ach":"22"},
{"matname":null,"qty_ach":"5"},
{"matname":null,"qty_ach":"-5"},
{"matname":null,"qty_ach":"7"}]}
按 tbl_mas_material.matname 分组
{"feed":[{"matname":null,"qty_ach":"22"},
{"matname":"100\/90-17 GRIPP TL CEAT","qty_ach":"6"},
{"matname":"100\/90-17 SECURA ZOOM CEAT TL","qty_ach":"22"},
{"matname":"100\/90-18 6PR SECURA ZOOM TL","qty_ach":"12"},
{"matname":"100\/90-18 GRIPP TL CEAT","qty_ach":"5"},
{"matname":"120\/80-17 SECURA PULSE","qty_ach":"6"},
{"matname":"2.50-17 04PR SECURA SPORT CEAT (R)","qty_ach":"4"},{"matname":"2.50-17 04PR SECURA ZOOM FX (F)","qty_ach":"3"},
{"matname":"2.75-14 06PR SECURA 275","qty_ach":"2"},
{"matname":"2.75-17 04PR SECURA ZOOM CEAT (F)","qty_ach":"17"},
{"matname":"2.75-17 04PR SECURA ZOOM TL","qty_ach":"10"},
{"matname":"2.75-18 04PR SECURA ZOOM (F)","qty_ach":"-11"},
{"matname":"3.00-10 4PR SECURA NEO TL CEAT","qty_ach":"5"},
{"matname":"3.00-17 04PR GRIPP","qty_ach":"33"},
{"matname":"3.00-17 06PR SECURA ZOOM CEAT (R)","qty_ach":"-11"},{"matname":"3.00-18 06PR SECURA SPORT CEAT (R)","qty_ach":"3"},
{"matname":"3.00-18 6PR SECURA ZOOM TL","qty_ach":"1"},
{"matname":"3.50-10 04PR SECURA NEO CEAT","qty_ach":"2"}]}
问题是这不是我想要的输出。参见例如 matname:null 。使用 group by 后它只给了我 22。但我想要它们的总和(matname 为 null):22+38+11+11+22+5-5+7 = 111
最佳答案
好吧，我在这里猜测是因为您没有分享确切的预期输出。但是，根据您写的事实，您想要“获取 qty_ach 的总和”，并且在当前输出中 qty_ach 未汇总，您没有使用 sum() 按查询中的功能分组。否则 MySQL 无法判断您想要对该字段求和。
这种情况下的查询看起来像下面几行:
SELECT tbl_mas_material.matname, sum(tbl_sales.qty_ach) as qty_ach_sum
FROM salesforce.tbl_sales
inner join salesforce.tbl_mas_customer on salesforce.tbl_mas_customer.customer = salesforce.tbl_sales.customer
left join salesforce.tbl_mas_material on salesforce.tbl_mas_material.matnum = salesforce.tbl_sales.material
where salesforce.tbl_sales.matgrp = 'FG0001'
and DATE_FORMAT(date, '%Y-%m') = '2017-01'
and salesforce.tbl_mas_customer.rep = '501'
group by tbl_mas_material.matname
关于mysql - 如何在同一查询中将 group by 与左连接和内连接一起使用？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41587873/