質問編集履歴
2
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create文です、データはcsvファイルからとってきたものです。
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```
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CREATE DATABASE IF NOT EXISTS MovieDB;
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USE MovieDB;
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DROP TABLE IF EXISTS Ratings;
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DROP TABLE IF EXISTS Users;
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DROP TABLE IF EXISTS Movies;
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CREATE TABLE Users (
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UserID INTEGER PRIMARY KEY,
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Age INTEGER,
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Gender CHAR(1),
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Occupation VARCHAR(20),
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ZipCode CHAR(5));
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CREATE TABLE Movies (
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MovieID INTEGER PRIMARY KEY,
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Title VARCHAR(120),
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ReleaseDate DATE,
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UNKNOWN ENUM('T','F'),
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Action ENUM('T','F'),
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Adventure ENUM('T','F'),
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Animation ENUM('T','F'),
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Children ENUM('T','F'),
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Comedy ENUM('T','F'),
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Crime ENUM('T','F'),
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Documentary ENUM('T','F'),
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Drama ENUM('T','F'),
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Fantasy ENUM('T','F'),
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FilmNoir ENUM('T','F'),
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Horror ENUM('T','F'),
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Musical ENUM('T','F'),
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Mystery ENUM('T','F'),
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Romance ENUM('T','F'),
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SciFi ENUM('T','F'),
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Thriller ENUM('T','F'),
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War ENUM('T','F'),
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Western ENUM('T','F'));
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CREATE TABLE Ratings (
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UserID INTEGER,
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MovieID INTEGER,
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Rating INTEGER,
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TS TIMESTAMP,
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PRIMARY KEY (UserID, MovieID),
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FOREIGN KEY (UserID) REFERENCES Users(UserID),
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FOREIGN KEY (MovieID) REFERENCES Movies(MovieID)
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);
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```
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次の条件のセレクト文を考えているのですが行き詰っています。
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1
不等号が反対だった。
test
CHANGED
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File without changes
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test
CHANGED
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@@ -26,7 +26,7 @@
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```
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select title from movies,users,ratings where count(movies.movieid = ratings.movieid and ratings.userid = users.userid and age
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select title from movies,users,ratings where count(movies.movieid = ratings.movieid and ratings.userid = users.userid and age < 50) = 0;
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```
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