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显示在每个战区查询

2016-11-23 89 views
0

enter image description here显示在每个战区查询

所有的电影我学习SQL和我有运行查询的麻烦。我发布了一个当前查询的屏幕截图，我得到了我想要的所有电影结果以及我想要的结果。它没有显示总共有0次放映的电影。如何包含没有放映的电影？我已经包含了所有的查询来创建表和外键。

-- -------------------------------------------------------------------------------- 
-- Options 
-- -------------------------------------------------------------------------------- 
USE dbSQL1;  -- Get out of the master database 
SET NOCOUNT ON; -- Report only errors 

-- -------------------------------------------------------------------------------- 
-- Drop Tables 
-- -------------------------------------------------------------------------------- 

    DROP TABLE TTicketPrices 
    DROP TABLE TTicketSales 
    DROP TABLE TShowings 
    DROP TABLE TTheaters 
    DROP TABLE TMovies 
    DROP TABLE TTicketTypes 
    DROP TABLE TScreenTypes 

    -- -------------------------------------------------------------------------------- 
    -- Step #1.1: Create Tables 
    -- -------------------------------------------------------------------------------- 

CREATE TABLE TTheaters 
(
     intTheaterID  INTEGER   NOT NULL 
    ,strTheater   VARCHAR(50)  NOT NULL 
    ,strTheaterAddress VARCHAR(50)  NOT NULL 
    ,strTheaterCity  VARCHAR(50)  NOT NULL 
    ,strTheaterState VARCHAR(50)  NOT NULL 
    ,CONSTRAINT TTheaters_PK PRIMARY KEY (intTheaterID) 
) 

CREATE TABLE TScreenTypes 
(
    intScreenTypeID INTEGER   NOT NULL 
    ,strScreenType  VARCHAR(50)  NOT NULL 
    ,CONSTRAINT TScreenTypes_PK PRIMARY KEY (intScreenTypeID) 
) 

CREATE TABLE TMovies 
(
    intMovieID   INTEGER   NOT NULL 
    ,strMovieName  VARCHAR(50)  NOT NULL 
    ,strDescription  VARCHAR(2000) NOT NULL 
    ,intRunningTime  INTEGER   NOT NULL 
    ,CONSTRAINT TMovies_PK PRIMARY KEY (intMovieID) 
) 

CREATE TABLE TShowings 
(
    intShowingID  INTEGER   NOT NULL 
    ,intTheaterID  INTEGER   NOT NULL 
    ,intScreenTypeID INTEGER   NOT NULL 
    ,intMovieID   INTEGER   NOT NULL 
    ,dteShowDate  DATE   NOT NULL 
    ,tmeShowTime  TIME   NOT NULL 
    ,CONSTRAINT TMovieShowings_PK PRIMARY KEY (intShowingID) 
) 

CREATE TABLE TTicketPrices 
(
    intTheaterID  INTEGER   NOT NULL 
    ,intScreenTypeID INTEGER   NOT NULL 
    ,intTicketTypeID INTEGER   NOT NULL 
    ,monTicketPrice  MONEY   NOT NULL 
    ,CONSTRAINT TTicketPrices_PK PRIMARY KEY (intTheaterID, intScreenTypeID, intTicketTypeID) 
) 

CREATE TABLE TTicketTypes 
(
    intTicketTypeID INTEGER   NOT NULL 
    ,strTicketType  VARCHAR(50)  NOT NULL --- Adult, Student, Child 
    ,CONSTRAINT TTicketTypes_PK PRIMARY KEY (intTicketTypeID) 
) 

CREATE TABLE TTicketSales 
(
    intTicketSaleID INTEGER   NOT NULL 
    ,intShowingID  INTEGER   NOT NULL 
    ,intTicketTypeID INTEGER   NOT NULL 
    ,monTicketPrice  MONEY   NOT NULL 
    ,CONSTRAINT TTicketSales_PK PRIMARY KEY (intTicketSaleID) 
) 



-- ------------------------------------------------------------------------- ------- 
-- Step #1.2: Identify and Create Foreign Keys 
-- -------------------------------------------------------------------------  ------- 
-- 
-- # Child        Parent       Column(s) 
-- - -----        ------      ----  ----- 
-- 1 TShowings       TTheaters      intTheaterID 
-- 2 TShowings       TScreenTypess     intScreenTypeID 
-- 3 TShowings       TMovies       intMovieID 
-- 4 TTicketPrices      TTheaters      intTheaterID 
-- 5 TTicketPrices      TScreenTypes     intScreenTypeID 
-- 6 TTicketPrices      TTicketTypes      intTicketTypeID 
-- 7 TTicketSales      TShowings      intShowingID 
-- 8 TTicketSales      TTicketTypes     intTicketTypeID 

-- 1 
ALTER TABLE TShowings ADD CONSTRAINT TShowings_TTheaters_FK 
FOREIGN KEY (intTheaterID) REFERENCES TTheaters (intTheaterID) 
-- 2 
ALTER TABLE TShowings ADD CONSTRAINT TShowings_TScreenTypes_FK 
FOREIGN KEY (intScreenTypeID) REFERENCES TScreenTypes (intScreenTypeID) 
-- 3 
ALTER TABLE TShowings ADD CONSTRAINT TShowings_TMovies_FK 
FOREIGN KEY (intMovieID) REFERENCES TMovies (intMovieID) 
-- 4 
ALTER TABLE TTicketPrices ADD CONSTRAINT TTicketPrices_TTheaters_FK 
FOREIGN KEY (intTheaterID) REFERENCES TTheaters (intTheaterID) 
-- 5 
ALTER TABLE TTicketPrices ADD CONSTRAINT TTicketPrices_TScreenTypes_FK 
FOREIGN KEY (intScreenTypeID) REFERENCES TScreenTypes (intScreenTypeID) 
-- 6 
ALTER TABLE TTicketPrices ADD CONSTRAINT TTicketPrices_TTicketTypes_FK 
FOREIGN KEY (intTicketTypeID) REFERENCES TTicketTypes (intTicketTypeID) 
-- 7 
ALTER TABLE TTicketSales ADD CONSTRAINT TTicketSales_TShowings_FK 
FOREIGN KEY (intShowingID) REFERENCES TShowings (intShowingID) 
-- 8 
ALTER TABLE TTicketSales ADD CONSTRAINT TTicketSale_TTicketTypes_FK 
FOREIGN KEY (intTicketTypeID) REFERENCES TTicketTypes (intTicketTypeID) 
-- ------------------------------------------------------------------------  -------- 
-- Step #1.3: Add data 
-- ------------------------------------------------------------------------  -------- 
INSERT INTO TTicketTypes (intTicketTypeID, strTicketType) 
VALUES (1, 'Adult') 
     ,(2, 'Student') 
     ,(3, 'Child') 
     ,(4, 'Senior') -- No sales for this ticket type. 

INSERT INTO TScreenTypes (intScreenTypeID, strScreenType) 
VALUES (1, 'Standard') 
    ,(2, 'Imax') 
    ,(3, '3D') 
    ,(4, '4D') -- No showings for this screen type 

INSERT INTO TTheaters (intTheaterID, strTheater, strTheaterAddress, strTheaterCity, strTheaterState) 
VALUES (1, 'Old Time Theater', '100 Main Street', 'Covington', 'KY') 
     ,(2, 'Super 8 Theater', '8 Your Street ', 'Your Town', 'OH') 
     ,(3, 'Main Street Theater', '203 High Road ', 'New Town', 'OH') 
     ,(4, 'Fun Time Theater', '20 New Avenue ', 'My Town', 'IN') -- No showings for this theater 

INSERT INTO TMovies (intMovieID, strMovieName, strDescription, intRunningTime) 
VALUES (1, 'Long Journey Home' , 'Heartfeld movie ... ', 165) 
     ,(2, 'Antartica', 'Educational movie ....', 205) 
     ,(3, 'Drama on the High Seas', 'Dramatic movie ....', 175) 
     ,(4, 'Aliens vs. Zombies', 'Scary movie about.....', 105) 
     ,(5, 'All About Penguins', 'Educational movie.....', 135) -- No showings for this movie 

INSERT INTO TShowings (intShowingID, intTheaterID, intMovieID, intScreenTypeID, dteShowDate, tmeShowTime) 
VALUES 
      (1, 1, 1, 1, '07/1/2015', '12:30') 
     ,(2, 1, 1, 1, '07/1/2015', '17:15') 
     ,(3, 1, 2, 1, '07/1/2015', '22:00') 

     ,(4, 1, 2, 1, '07/1/2015', '11:00') 
     ,(5, 1, 2, 1, '07/1/2015', '15:15') 
     ,(6, 1, 2, 3, '07/1/2015', '20:50') 
     ,(7, 1, 3, 1, '07/1/2015', '11:15') 
     ,(8, 1, 3, 1, '07/1/2015', '16:15') 
     ,(9, 1, 3, 1, '07/1/2015', '22:45') 
     ,(10, 2, 1, 2, '07/2/2015', '11:30') 
     ,(11, 2, 1, 2, '07/2/2015', '17:15') 
     ,(12, 2, 1, 2, '07/2/2015', '23:00') 
     ,(13, 2, 2, 2, '07/2/2015', '11:00') 
     ,(14, 2, 2, 1, '07/2/2015', '16:15') 
     ,(15, 2, 2, 3, '07/2/2015', '20:50') 
     ,(16, 2, 3, 1, '07/2/2015', '12:15') 
     ,(17, 2, 3, 1, '07/2/2015', '17:15') 
     ,(18, 2, 3, 1, '07/2/2015', '23:45') 
     ,(19, 2, 1, 1, '07/1/2015', '12:00') 
     ,(20, 3, 3, 3, '07/1/2015', '17:45') 
     ,(21, 3, 3, 1, '07/1/2015', '22:10') 
     ,(22, 3, 2, 1, '07/1/2015', '12:00') 
     ,(23, 3, 2, 1, '07/1/2015', '16:15') 
     ,(24, 3, 2, 1, '07/1/2015', '22:50') 
     ,(25, 3, 2, 1, '07/1/2015', '11:45') 
     ,(26, 3, 3, 2, '07/1/2015', '16:25') 
     ,(27, 3, 3, 1, '07/1/2015', '23:45') 
     ,(28, 3, 3, 1, '07/1/2015', '12:00') 
     ,(29, 1, 2, 3, '07/1/2015', '17:45') 
     ,(30, 1, 4, 1, '07/1/2015', '22:10') 
     ,(31, 1, 3, 1, '07/1/2015', '12:00') 
     ,(32, 2, 3, 1, '07/1/2015', '16:15') 
     ,(33, 2, 4, 1, '07/1/2015', '22:50') 
     ,(34, 2, 1, 1, '07/1/2015', '11:45') 
     ,(35, 3, 2, 3, '07/1/2015', '16:25') 
     ,(36, 3, 3, 1, '07/1/2015', '23:45') 
     ,(37, 1, 1, 3, '07/3/2015', '22:10') 
     ,(38, 1, 3, 1, '07/3/2015', '12:00') 
     ,(39, 2, 3, 1, '07/3/2015', '16:15') 
     ,(40, 2, 3, 2, '07/3/2015', '22:50') 
     ,(41, 2, 1, 1, '07/3/2015', '11:45') 
     ,(42, 3, 2, 3, '07/3/2015', '16:25') 
     ,(43, 3, 3, 1, '07/3/2015', '23:45') 

INSERT INTO TTicketPrices (intTheaterID, intScreenTypeID, intTIcketTypeID, monTicketPrice) 
    VALUES (1, 1, 1, 11.00) -- Standard Screen, Adult 
      ,(1, 1, 2, 8.00) -- Standard Screen, Student 
      ,(1, 1, 3, 6.50) -- Standard Screen, Child 
      ,(1, 1, 4, 7.50) -- Standard Screen, Senior 
      ,(1, 2, 1, 12.00) -- Imax Screen, Adult 
      ,(1, 2, 2, 9.00) -- Imax Screen, Student 
      ,(1, 2, 3, 7.00) -- Imax Screen, Child 
      ,(1, 2, 4, 7.25) -- IMax Screen, Senior 
      ,(1, 3, 1, 15.00) -- 3D, Adult 
      ,(1, 3, 2, 12.00) -- 3D, Student 
      ,(1, 3, 3, 10.00) -- 3D, Child 
      ,(1, 3, 4, 10.50) -- 3D Screen, Senior 
-- Theater 2 
      ,(2, 1, 1, 11.50) -- Standard Screen, Adult 
      ,(2, 1, 2, 8.50) -- Standard Screen, Student 
      ,(2, 1, 3, 6.50) -- Standard Screen, Child 
      ,(2, 2, 1, 12.50) -- Imax Screen, Adult 
      ,(2, 2, 2, 9.50) -- Imax Screen, Student 
      ,(2, 2, 3, 7.50) -- Imax Screen, Child 
      ,(2, 3, 1, 15.50) -- 3D, Adult 
      ,(2, 3, 2, 12.50) -- 3D, Student 
      ,(2, 3, 3, 10.50) -- 3D, Child 
      ,(2, 4, 1, 15.50) -- 4D, Adult 
      ,(2, 4, 2, 12.50) -- 4D, Student 
      ,(2, 4, 3, 10.50) -- 4D, Child 
-- Theater 3 
     ,(3, 1, 1, 11.50) -- Standard Screen, Adult 
     ,(3, 1, 2, 7.50) -- Standard Screen, Student 
     ,(3, 1, 3, 5.50) -- Standard Screen, Child 
     ,(3, 2, 1, 11.50) -- Imax Screen, Adult 
     ,(3, 2, 2, 9.00) -- Imax Screen, Student 
     ,(3, 2, 3, 7.00) -- Imax Screen, Child 
     ,(3, 3, 1, 15.00) -- 3D, Adult 
     ,(3, 3, 2, 13.00) -- 3D, Student 
     ,(3, 3, 3, 9.50) -- 3D, Child 

INSERT INTO TTicketSales (intTicketSaleID, intShowingID, intTicketTypeID, monTicketPrice) 
VALUES (1, 1, 1, 11) 
     ,(2, 26, 1, 11.5) 
     ,(3, 28, 1, 11.5) 
     ,(4, 5, 2, 8) 
     ,(5, 26, 3, 7)  
     ,(6, 12, 1, 12.5) 
     ,(7, 13, 2, 9.5) 
     ,(8, 7, 1, 11) 
     ,(9, 2, 2, 8) 
     ,(10, 16, 3, 6.5) 
     ,(11, 8, 1, 11) 
     ,(12, 22, 2, 7.5) 
     ,(13, 19, 3, 6.5) 
     ,(14, 17, 3, 6.5) 
     ,(15, 9, 1, 11) 
     ,(16, 21, 2, 7.5) 
     ,(17, 27, 2, 7.5) 
     ,(18, 34, 3, 6.5) 
     ,(19, 13, 3, 7.5) 
     ,(20, 11, 1, 12.5) 
     ,(21, 19, 1, 11.5) 
     ,(22, 17, 1, 11.5) 
     ,(23, 1, 2, 8) 
     ,(24, 36, 3, 5.5) 
     ,(25, 11, 2, 9.5) 
     ,(26, 17, 2, 8.5) 
     ,(27, 20, 2, 13) 
     ,(28, 21, 1, 11.5) 
     ,(29, 22, 3, 5.5) 
     ,(30, 21, 3, 5.5) 
     ,(31, 9, 3, 6.5) 
     ,(32, 7, 2, 8) 
     ,(33, 2, 1, 11) 
     ,(34, 3, 1, 11) 
     ,(35, 14, 1, 11.5) 
     ,(36, 30, 1, 15) 
     ,(37, 15, 1, 15.5) 
     ,(38, 29, 1, 15) 
     ,(39, 6, 1, 15) 
     ,(40, 27, 1, 11.5) 
     ,(41, 36, 1, 11.5) 
     ,(42, 6, 2, 12) 
     ,(43, 10, 3, 7.5) 
     ,(44, 27, 3, 5.5) 


SELECT 
     TT.intTheaterID 
    ,TT.strTheater 
    ,TM.intMovieID 
    ,TM.strMovieName 
    ,SUM(TM.intMovieID) AS intTotalMovies 
FROM 
     TTheaters  AS TT --A 
    ,TShowings  AS TS --B 
    ,TMovies  AS TM --C 
WHERE 
    --A to B 
      TT.intTheaterID  = TS.intTheaterID 

    --B to C 
    AND TS.intMovieID   = TM.intMovieID 
GROUP BY 
    TT.intTheaterID 
    ,TT.strTheater 
    ,TM.intMovieID 
    ,TM.strMovieName 

ORDER BY 
    TT.intTheaterID

来源

2016-11-23 Brad Wethington

+0

你可以在这里发布你的查询吗？如果可能的话，在一个单独的代码块中？ – axlj

+0

没有图片。文本。 – Drew

+3

你在哪里学习SQL？没有人应该再教这些老式的联合。我会找到一位新老师。 –

回答

2

请勿使用旧式连接。有了这个，这里是一个解释。

由于您要计算每部电影的放映次数，因此我们需要COUNT而不是SUM。其次，我们需要在正确的领域做到这一点。总结一个唯一的标识符几乎不会被做，因为它是一个任意值。相反，由于您想查看电影的显示次数，因此与显示相关的唯一标识符，而不是电影本身。 COUNT(TS.intShowingID) AS totalShowings

最后，因为电影可以有0看房，我们需要使用TMovies表基表，从选择，并LEFT JOIN它，因此我们不会删除/限制/筛选任何电影出来的。

 TMovies AS TM 
     LEFT JOIN TShowings TS ON TS.intMovieID = TM.intMovieID 
     LEFT JOIN TTheaters TT on TT.intTheaterID = TS.intTheaterID

现在，把它放在一起....

SELECT 
     TT.intTheaterID 
    ,TT.strTheater 
    ,TM.intMovieID 
    ,TM.strMovieName 
    ,COUNT(TS.intShowingID) AS totalShowings 
FROM 
     TMovies AS TM 
     LEFT JOIN TShowings TS ON TS.intMovieID = TM.intMovieID 
     LEFT JOIN TTheaters TT on TT.intTheaterID = TS.intTheaterID 
GROUP BY 
    TM.intMovieID 
    ,TT.intTheaterID 
    ,TT.strTheater 
    ,TM.strMovieName 

ORDER BY 
    TT.intTheaterID

你会看到intMoveID 5没有任何与之相关的剧院，因为不被任何地方显示它。

如果你想显示所有的剧院（如没有放映的娱乐时间剧院），你可以使用FULL OUTER JOIN。有许多加入选项，你应该努力学习。这是结构化查询语言的一个非常关键的方面。

来源

2016-11-23 18:22:57 scsimon

+0

感谢您的解释。我是聚合和子查询的新手，这是我收到的最好的解释。 –

+0

很高兴帮助@BradWethington – scsimon

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