顯示每月而不是具體數據。需要小的調整

Question

我想按工作類型顯示每月總髮票數，但似乎是在縮減每月總數。我只想顯示每個工作類型的總數。

這是我到目前爲止已經完成：

select `vinvoices`.`yymm` AS `yymm`, 
`vinvoices`.`location` AS `job_location`, 
`vinvoices`.`job_no` AS `job_no`, 
format(sum(`vinvoices`.`amount`),0) AS `amount`, 
`tjobtypes`.`type_name` AS `type` from ((`vinvoices` join `tjobs` on((`tjobs`.`job_no` = `vinvoices`.`job_no`))) join `tjobtypes` on((`tjobtypes`.`type_no` = `tjobs`.`type_no`))) 
group by `vinvoices`.`yymm`,`vinvoices`.`location` 

這裏是vinvoices領域：

• 日期
• job_no - 這通過tjobs表連接到jobtypes場
• job_name
• client_name
• 量
• ppaid
• inv_no
• 概率
• 筆記
• 接觸
• 位置
• YYMM

Answer 1

我認爲你需要寫COUNT()而不是SUM()，就像這樣：

select `vinvoices`.`yymm` AS `yymm`, 
`vinvoices`.`location` AS `job_location`, 
`vinvoices`.`job_no` AS `job_no`, 
format(COUNT(`vinvoices`.`amount`),0) AS `amount`, 
`tjobtypes`.`type_name` AS `type` from ((`vinvoices` join `tjobs` on((`tjobs`.`job_no` = `vinvoices`.`job_no`))) join `tjobtypes` on((`tjobtypes`.`type_no` = `tjobs`.`type_no`))) 
group by `vinvoices`.`yymm`,`vinvoices`.`location`