Question

我有两张桌子

RejectionDate ：

'2016-07-01'
'2016-08-01'
'2016-09-01'

PayDate ：

PayDateStart     PayDateEnd
'2016-08-01'    '2016-09-01'

我需要检查第一个表RejectionDate中的所有日期是否属于另一个表PayDate中存储的句点。

Answer 1

这是一种你可以获得每行标志的方法 - 我猜这是问题的真正意图。无论您使用何种数据库：

select r.*,
       (case when exists (select 1
                          from paydates pd
                          where r.rejectiondate between p.PayDateStart and p.PayDateEnd
                         )
             then 1 else 0
        end) as InRangeFlag
from rejections r;

Answer 2

加入他们？

select rd.*
from RejectionDate rd
inner join PayDate pd
on rd.RejectionDate between pd.PayDateStart and pd.PayDateEnd

Answer 3

您可以使用如下查询：

第一个A <- read_html('http://www.basketball-reference.com/teams/CLE/2017.html') %>% # Read in the raw webpage xml_find_all('//comment()') %>% # Use xpath to find all comment nodes xml_text() %>% # convert to raw strings paste0(collapse = "") %>% # flatten into a character vector read_html %>% # re-read as html content xml_find_all("//table") %>% html_table cat(capture.output(lapply(A, head, 1)), sep = "\n") [[1]] Date Type Note 1 Kevin Love 2017-02-12 Knee Love is expected to miss six weeks after undergoing arthroscopic surgery on his left knee. [[2]] X1 X2 1 Jim BoylanÂ Â Assistant Coach [[3]] G MP FG FGA FG% 3P 3PA 3P% 2P 2PA 2P% FT FTA FT% ORB DRB TRB AST STL BLK TOV PF PTS 1 Team 58 14020 2305 4938 0.467 761 1952 0.39 1544 2986 0.517 1073 1420 0.756 564 1988 2552 1304 414 237 804 1033 6444 [[4]] NA NA NA NA NA NA NA NA NA NA Advanced NA Offense Four Factors NA NA NA Defense Four Factors NA NA NA NA 1 W L PW PL MOV SOS SRS ORtg DRtg Pace FTr 3PAr eFG% TOV% ORB% FT/FGA eFG% TOV% DRB% FT/FGA Arena Attendance [[5]] Rk Age G GS MP FG FGA FG% 3P 3PA 3P% 2P 2PA 2P% eFG% FT FTA FT% ORB DRB TRB AST STL BLK TOV PF PTS/G 1 1 LeBron James 32 54 54 37.5 9.6 17.7 0.541 1.7 4.4 0.387 7.9 13.3 0.592 0.589 4.8 6.9 0.691 1.1 6.7 7.9 8.9 1.4 0.6 4.3 1.7 25.7 [[6]] Rk Age G GS MP FG FGA FG% 3P 3PA 3P% 2P 2PA 2P% eFG% FT FTA FT% ORB DRB TRB AST STL BLK TOV PF PTS 1 1 LeBron James 32 54 54 2026 518 957 0.541 92 238 0.387 426 719 0.592 0.589 259 375 0.691 62 363 425 479 74 32 230 92 1387 [[7]] Rk Age G GS MP FG FGA FG% 3P 3PA 3P% 2P 2PA 2P% FT FTA FT% ORB DRB TRB AST STL BLK TOV PF PTS 1 1 LeBron James 32 54 54 2026 9.2 17 0.541 1.6 4.2 0.387 7.6 12.8 0.592 4.6 6.7 0.691 1.1 6.5 7.6 8.5 1.3 0.6 4.1 1.6 24.6 [[8]] Rk Age G GS MP FG FGA FG% 3P 3PA 3P% 2P 2PA 2P% FT FTA FT% ORB DRB TRB AST STL BLK TOV PF PTS ORtg DRtg 1 1 LeBron James 32 54 54 2026 12.7 23.4 0.541 2.3 5.8 0.387 10.4 17.6 0.592 6.3 9.2 0.691 1.5 8.9 10.4 11.7 1.8 0.8 5.6 2.3 34 NA 118 107 [[9]] Rk Age G MP PER TS% 3PAr FTr ORB% DRB% TRB% AST% STL% BLK% TOV% USG% Â OWS DWS WS WS/48 Â OBPM DBPM BPM VORP 1 1 LeBron James 32 54 2026 26.3 0.618 0.249 0.392 3.5 19.1 11.6 41.7 1.8 1.3 17 29.4 NA 6.9 2.4 9.3 0.22 NA 6.3 1.8 8 5.1 [[10]] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 2-Pt Field Goals NA NA 3-Pt Field Goals NA 1 <NA> <NA> <NA> <NA> <NA> <NA> % of FGA by Distance <NA> <NA> <NA> NA <NA> FG% by Distance <NA> <NA> <NA> NA <NA> Dunks <NA> Corner NA NA NA 1 <NA> Heaves <NA> [[11]] Rk Salary 1 1 LeBron James $30,963,450 [[12]] Yr Tm Rd Pk Team G MP FG FGA FG% 3P 3PA 3P% FT FTA FT% ORB DRB TRB AST STL BLK TOV PF PTS 1 Vladimir Veremeenko NA 2006 WAS 2 48 NA Reggio Emilia it 18 139 17 29 0.586 0 0 NA 4 9 0.444 14 10 24 8 2 3 9 33 38返回第一个表的所有记录的数量，而第二个SELECT COUNT(*) AS all_dates, COUNT(t2.PayDateEnd) AS all_between_dates FROM Rejections AS t1 LEFT JOIN PayDate AS t2 ON t1.RejectionDate BETWEEN t2.PayDateStart AND t2.PayDateEnd返回第一个表的所有记录的数量，这些记录的日期介于开始/结束日期之间第二张表。

Demo here

SQL：检查两个表中是否存在日期

3 个答案: