生成日期範圍天行（非連續）

Question

我想運行一個查詢像

SELECT distinct(generate_series(timestamp start_date, interval '1' day) as d 
FROM NAEDO 
WHERE start_date >= '2014/08/13' 
AND start_date <= '2014/09/12' 
ORDER BY start_date 

而像返回數據：（以天數範圍，但是從數據[可能的非連續天數]）

days 
--- 
13 
16 
17 
18 
25 
29 
1 
3 

Answer 1

這是你在找什麼？

SELECT distinct date_trunc('day', start_date) as d 
FROM NAEDO 
WHERE start_date >= '2014-08-13' AND start_date <= '2014-09-12' 
ORDER BY d 

Answer 2

SELECT DISTINCT start_date, extract(day from start_date) as d 
FROM NAEDO 
WHERE start_date >= '2014-08-13' AND start_date <= '2014-09-12' 
ORDER BY start_date 

也許還有一個辦法做到這一點沒有額外列...
但是，這是一個報告，你可以只在報告中省略額外的列。