MySQL數量和顯示範圍內的所有日期

Question

我有一個MySQL查詢的問題。我有以下表格：

[id] 
[from] DATE (Y-m-d) 
[days] INT 
[...] 

和我有兩個PHP變量$start和$end。我想有這樣的結果，例如：

$start = 2012-19-03 
$end = 2012-24-03 
$result = array(
[0] => COUNT of rows WHERE '2012-19-03' BETWEEN from AND from + INTERVAL days DAY 
[1] => COUNT of rows WHERE '2012-20-03' BETWEEN from AND from + INTERVAL days DAY 
[2] => COUNT of rows WHERE '2012-21-03' BETWEEN from AND from + INTERVAL days DAY 
[4] => COUNT of rows WHERE '2012-22-03' BETWEEN from AND from + INTERVAL days DAY 
[5] => COUNT of rows WHERE '2012-23-03' BETWEEN from AND from + INTERVAL days DAY 
[6] => COUNT of rows WHERE '2012-24-03' BETWEEN from AND from + INTERVAL days DAY 
} 

直到現在我與每一天的查詢這樣做在一個while循環，但應該有一個更好的辦法。我的問題是GROUP BY，那裏的數據不存在的日子。

更詳細的例子：

的樣本數據：

id, from,  days 
1, 2012-15-03, 2 
2, 2012-15-03, 5 
3, 2012-13-03, 20 
4, 2012-16-03, 1 

期望的結果：

$start = 2012-11-03 
$end = 2012-19-03 
$result = array(
[0] => 0 (ROWS IN DB WHERE '2012-11-03' BETWEEN from AND from+days -- no match in data), 
[1] => 0 (ROWS IN DB WHERE '2012-12-03' BETWEEN from AND from+days -- no match in data), 
[2] => 1 (ROWS IN DB WHERE '2012-13-03' BETWEEN from AND from+days -- id #3 matches), 
[3] => 1 (and so on), 
[4] => 3, 
[5] => 4, 
[6] => 3, 
[7] => 2 
) 

這樣的..

興小時沒有找到一種方法，我希望你能幫我， 問候

Answer 1

我不知道你問

，但似乎你可以使用和使用的if/else和group by才達到什麼：

象下面這樣：

select sum(if('2012-19-03' BETWEEN `from` AND date_Add(`from` , INTERVAL days DAY)),1,0)) as firstdaycount, 
sum(if('2012-20-03' BETWEEN `from` AND date_Add(`from` , INTERVAL days DAY)),1,0)) as secondaycount, 
.. 
.... 
..... 
...... 
..... 
where [...] 
Group By ... 

讓我知道如果你需要進一步的幫助。

Answer 2

試試這個：

SELECT `from`, COUNT(*) TotalRows 
FROM tableName 
WHERE `from` <= date('$start') AND `from` >= date('$end') 
GROUP BY `from` 
ORDER BY `from` 

Answer 3

修訂的答案：以 「日期列表」 表應該幫助加盟。該表是一個包含日期的列表（例如2000到2050年）。填充此表應該很簡單：您可以在Excel中創建數據並將其導入到MySQL中或編寫一個（PHP）腳本。讓我們稱之爲表datelist（可以使用this query填充表）：

CREATE TABLE `datelist` (
`date` DATE NOT NULL, 
PRIMARY KEY (`date`) 
); 

至於您的查詢，它只是變成了：

SELECT datelist.`date`, COUNT(table1.id) 
FROM datelist 
LEFT JOIN table1 ON datelist.`date` BETWEEN table1.`from` AND (table1.`from` + INTERVAL table1.days DAY) 
WHERE datelist.`date` BETWEEN '2012-03-19' AND '2012-03-24' 
GROUP BY datelist.`date`