Question

我有2个tables.ms_expese和track_expense。使用此表生成一个事实表我想要ms_expense中的expense_name，来自track_expense的expense_amount。

我想根据日期得到特定fee_name的expense_amount之和。日期顺序为1,2 ... 12作为月份id

            SELECT DATE_Format(a.date,'%b') as month_id,b.expense_name AS  expense_type, sum(a.expense_amount) AS expense_amount FROM ms_expense b JOIN track_expense a on a.`expense_id`=b.`expense_id` group by DATE_Format(a.date,'%b')

如何将月份ID按1,2，... 12和我的日期格式y-m-d的顺序排列我得到apr，aug等月份，但我需要jan为1，feb as 2

我有25个费用（费用名称）。在这个查询中我只得到了第一笔费用的总费用。我想要每个月所有费用的总费用

Answer 1

CREATE TABLE fact AS 
(<your select query>)

您的选择查询可以采用以下格式

SELECT MONTH(date)as month_id,expense_name,sum(expense_amount) 
FROM ms_expense JOIN track_expense using (expense_id) 
group by expense_name,MONTH(date)

如何在Mysql中编写查询

1 个答案: