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createtables.sql
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createtables.sql
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CREATE TABLE IF NOT EXISTS TWEET (
ID INTEGER,
tText TEXT,
nr_retweets INTEGER,
nr_likes INTEGER,
is_retweet BOOLEAN NOT NULL,
has_hashtag BOOLEAN NOT NULL,
person BOOLEAN,
Ti_ID BIGINT NOT NULL,
PRIMARY KEY (ID),
FOREIGN KEY(Ti_ID) REFERENCES TIME (Ti_ID),
FOREIGN KEY(person) REFERENCES CANDIDATE (Nr)
)
CREATE TABLE IF NOT EXISTS CANDIDATE (
Nr BOOLEAN,
Name VARCHAR(15),
PRIMARY KEY(Nr)
)
CREATE TABLE IF NOT EXISTS TIME (
Ti_ID BIGINT,
Date DATE,
t_of_day TIME,
PRIMARY KEY (Ti_ID)
)
CREATE TABLE IF NOT EXISTS HASHTAG (
text TEXT,
nr_tweets INTEGER,
nr_retweets INTEGER,
nr_likes INTEGER,
PRIMARY KEY (text)
)
CREATE TABLE IF NOT EXISTS HASHTAGPAIR (
pairText TEXT,
nr_tweets INTEGER,
nr_retweets INTEGER,
nr_likes INTEGER,
PRIMARY KEY (pairText)
)
CREATE TABLE IF NOT EXISTS uses(
ID INTEGER,
text TEXT,
PRIMARY KEY (ID, text),
FOREIGN KEY(text) REFERENCES HASHTAG (text),
FOREIGN KEY(text) REFERENCES HASHTAGPAIR (pairText),
FOREIGN KEY(ID) REFERENCES TWEET (ID)
)
CREATE TABLE IF NOT EXISTS is_used_at(
text TEXT,
Ti_ID BIGINT,
PRIMARY KEY (text, Ti_ID),
FOREIGN KEY(text) REFERENCES HASHTAG (text),
FOREIGN KEY(Ti_ID) REFERENCES TIME (Ti_ID)
)
CREATE TABLE IF NOT EXISTS is_used_at2(
pairText TEXT,
Ti_ID BIGINT,
PRIMARY KEY (pairText, Ti_ID),
FOREIGN KEY(pairText) REFERENCES HASHTAGPAIR (pairText),
FOREIGN KEY(Ti_ID) REFERENCES TIME (Ti_ID)
)
CREATE TABLE IF NOT EXISTS is_part_of(
text TEXT,
pairText TEXT,
PRIMARY KEY (text, pairText),
FOREIGN KEY(text) REFERENCES HASHTAG (text),
FOREIGN KEY(pairText) REFERENCES HASHTAGPAIR (pairText)
)