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        在 SQLite 中按月分组

        Group by month in SQLite(在 SQLite 中按月分组)

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                • 本文介绍了在 SQLite 中按月分组的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我有一个包含交易的 SQLite 数据库,每个交易都有一个 price 和一个 transDate.

                  I have an SQLite database which contains transactions, each of them having a price and a transDate.

                  我想检索按月分组的交易总和.检索到的记录应如下所示:

                  I want to retrieve the sum of the transactions grouped by month. The retrieved records should be like the following:

                  Price    month
                  230        2
                  500        3
                  400        4
                  

                  推荐答案

                  当你按 MONTH 分组时,它也应该检查 YEAR 总是好的

                  select SUM(transaction) as Price, 
                         DATE_FORMAT(transDate, "%m-%Y") as 'month-year' 
                         from transaction group by DATE_FORMAT(transDate, "%m-%Y");
                  

                  对于 SQLITE

                  select SUM(transaction) as Price, 
                         strftime("%m-%Y", transDate) as 'month-year' 
                         from transaction group by strftime("%m-%Y", transDate);
                  

                  这篇关于在 SQLite 中按月分组的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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