显示每月而不是特定数据。需要小的调整

Question

我希望按作业类型显示每月的总发票数，但似乎每月的总发票量都在显着。我只是想显示每个工作类型的总数。

这是我到目前为止所做的：

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`

以下是vinvoices的字段：

• 日期
• job_no - 通过tjobs表连接到jobtypes字段
• JOB_NAME
• CLIENT_NAME
• 金额
• ppaid
• inv_no
• 概率
• 注释
• 接触
• 位置
• YYMM

Answer 1

我认为你需要写COUNT()而不是SUM()，如下所示：

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`