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  • mysql练习----More JOIN operations

    This tutorial introduces the notion of a join. The database consists of three tables movie , actor and casting .

     


    movie
    actorcasting
    id id movieid
    title name actorid
    yr   ord
    director    
    budget    
    gross    
         

    movie

    Field nameTypeNotes
    id INTEGER An arbitrary unique identifier
    title CHAR(70) The name of the film - usually in the language of the first release.
    yr DECIMAL(4) Year of first release.
    director INT A reference to the actor table.
    budget INTEGER How much the movie cost to make (in a variety of currencies unfortunately).
    gross INTEGER How much the movie made at the box office.

    Example

    idtitleyrdirectorbudgetgross
    10003 "Crocodile" Dundee II 1988 38 15800000 239606210
    10004 'Til There Was You 1997 49 10000000  

    actor

    Field nameTypeNotes
    id INTEGER An arbitrary unique identifier
    name CHAR(36) The name of the actor (the term actor is used to refer to both male and female thesps.)

    Example

    idname
    20 Paul Hogan
    50 Jeanne Tripplehorn

    casting

    Field nameTypeNotes
    movieid INTEGER A reference to the movie table.
    actorid INTEGER A reference to the actor table.
    ord INTEGER The ordinal position of the actor in the cast list. The

    star of the movie will have ord value 1 the co-star will have

    value 2, ...

    Example

    movieidactoridord
    10003 20 4
    10004 50 1
     
     

     

     

     

     

     

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  • 原文地址:https://www.cnblogs.com/tk55/p/6759749.html
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