SQLite按月份分組

Question

我有一個SQLite數據庫包含交易，他們每個人都有價格和transDate。

我想檢索按月份分組的交易總和。檢索到的記錄應該是這樣的：

Price month 
230  2 
500  3 
400  4 

Answer 1

這是一件好事，而你組每月應檢查今年還

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

SQLite的

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

Answer 2

您可以在本月啓動組：

select date(DateColumn, 'start of month') 
,  sum(TransactionValueColumn) 
from YourTable 
group by 
     date(DateColumn, 'start of month') 

Answer 3

嘗試以下操作：

SELECT SUM(price), strftime('%m', transDate) as month 
FROM your_table 
GROUP BY strftime('%m', transDate); 

使用corresponding page SQLite的文檔中爲將來的參考。

Answer 4

SELECT 
    SUM(Price) as Price, strftime('%m', myDateCol) as Month 
FROM 
    myTable 
GROUP BY 
    strftime('%m', myDateCol)