计算总数

Question

We have table structure and data like

Id | startdate | enddate   | price
1. |  1 jan    | 30 Jan    | 100
2  |  1 Feb    | 28 Feb    | 200
3. |  1 March  |  31 March | 300

Now I want to calculate total price between the date range. Like from 1 Jan to 28 Feb total count will be 300, from 1 Feb to 31 March total count will.be 500, how to write query for this

Answer 1

Something like this,

SELECT SUM(price) FROM [TABLE_NAME] WHERE DATE BETWEEN '2012-01-01' AND '2012-02-28'

Please note that this might not be the correct MySQL syntax, but you get the idea.

Answer 2

如果这些存储为日期字段，您可以执行以下操作

Select SUM(Price) from Table where startdate > DD/MM/YYYY and enddate < DD/MM/YYYY

Answer 3

You need to store your dates in the DATE format. Then we will simply perform a SUM on the table with the appropriate WHERE conditions.

SELECT SUM(price) FROM tablename WHERE startdate > '2012-01-01' AND enddate < '2012-02-28'