從sqlite中檢索數據

Question

我想實現的是從SQLite數據庫檢索記錄，這些記錄在當前日期前3天和當前日期後3天（包括當前日期）的範圍內。

如何做到這一點，請建議一些例子來嘗試。

Answer 1

首先在其中存儲日期欄應該是一個長型。該列將存儲日期的紀元毫秒數。

現在對於查詢

Calendar calendar = Calendar.getInstance(); // This will give you the current time. 
    // Removing the timestamp from current time to point to todays date 
    calendar.set(Calendar.HOUR_OF_DAY, 0); 
    calendar.set(Calendar.MINUTE, 0); 
    calendar.set(Calendar.SECOND, 0); 
    calendar.set(Calendar.MILLISECOND, 0); 
    calendar.add(Calendar.DATE, -3); // Will subtract 3 days from today. 
    Date beforeThreeDays = calendar.getTime(); 
    calendar.add(Calendar.DATE, 6); // Will be your 3 days after today 
    Date afterThreeDays = calendar.getTime(); 

    db.query("Table", null, "YOUR_DATE_COLUMN >= ? AND YOUR_DATE_COLUMN <= ?", new String[] { beforeThreeDays.getTime() + "", afterThreeDays.getTime() + "" }, null, null, null); 

Answer 2

Select * 
From TABLE_NAME 
WHERE DATEDIFF(day, GETDATE(), COLUMN_TABLE) <= 3