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sql_queries.py
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sql_queries.py
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# DROP TABLES
songplay_table_drop = "DROP TABLE IF EXISTS SONGPLAYS;"
user_table_drop = "DROP TABLE IF EXISTS USERS;"
song_table_drop = "DROP TABLE IF EXISTS SONGS;"
artist_table_drop = "DROP TABLE IF EXISTS ARTISTS;"
time_table_drop = "DROP TABLE IF EXISTS TIME;"
# CREATE TABLES
songplay_table_create = ("""CREATE TABLE IF NOT EXISTS SONGPLAYS(
songplay_id SERIAL PRIMARY KEY,
start_time BIGINT NOT NULL,
user_id INT NOT NULL,
level VARCHAR NOT NULL,
song_id VARCHAR,
artist_id VARCHAR,
session_id INT,
location VARCHAR,
user_agent VARCHAR
);
""")
user_table_create = ("""CREATE TABLE IF NOT EXISTS USERS(
user_id int PRIMARY KEY,
first_name VARCHAR NOT NULL,
last_name VARCHAR NOT NULL,
gender VARCHAR,
level VARCHAR
);
""")
song_table_create = ("""CREATE TABLE IF NOT EXISTS SONGS(
song_id VARCHAR PRIMARY KEY,
title VARCHAR(255) NOT NULL,
artist_id VARCHAR(255) NOT NULL,
year INT,
duration FLOAT NOT NULL
);
""")
artist_table_create = ("""CREATE TABLE IF NOT EXISTS ARTISTS(
artist_id VARCHAR(255) PRIMARY KEY,
name VARCHAR(255) NOT NULL,
location VARCHAR,
latitude FLOAT,
longitude FLOAT
);
""")
time_table_create = ("""CREATE TABLE IF NOT EXISTS TIME(
start_time TIME PRIMARY KEY,
hour INT NOT NULL,
day INT NOT NULL,
week INT NOT NULL,
month INT NOT NULL,
year INT NOT NULL,
weekday INT NOT NULL
);
""")
# INSERT RECORDS
songplay_table_insert = ("""INSERT INTO SONGPLAYS(start_time, user_id, level, song_id, artist_id, session_id, location, user_agent) \
VALUES(%s, %s, %s, %s, %s, %s, %s, %s)
ON CONFLICT (songplay_id) DO NOTHING
;""")
user_table_insert = ("""INSERT INTO USERS(user_id, first_name, last_name, gender, level) \
VALUES(%s, %s, %s, %s, %s)
ON CONFLICT(user_id) DO UPDATE SET level = excluded.level
;""")
song_table_insert = ("""INSERT INTO SONGS(song_id, title, artist_id, year, duration) \
VALUES(%s, %s, %s, %s, %s)
ON CONFLICT (song_id) DO NOTHING
;""")
artist_table_insert = ("""INSERT INTO ARTISTS(artist_id, name, location, latitude, longitude) \
VALUES(%s, %s, %s, %s, %s)
ON CONFLICT (artist_id) DO NOTHING
;""")
time_table_insert = ("""INSERT INTO TIME(start_time, hour, day, week, month, year, weekday) \
VALUES(%s, %s, %s, %s, %s, %s, %s)
ON CONFLICT (start_time) DO NOTHING
;""")
# FIND SONGS
song_select = ("""SELECT s.song_id songid, a.artist_id artistid \
FROM \
songs s \
JOIN \
artists a \
ON \
s.artist_id = a.artist_id \
WHERE \
s.title = %s and a.name = %s and s.duration = %s;""")
# QUERY LISTS
create_table_queries = [songplay_table_create, user_table_create, song_table_create, artist_table_create, time_table_create]
drop_table_queries = [songplay_table_drop, user_table_drop, song_table_drop, artist_table_drop, time_table_drop]