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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 songplay;"
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 songplay(songplay_id SERIAL NOT NULL PRIMARY KEY,
start_time BIGINT NOT NULL ,
user_id INT NOT NULL ,
level VARCHAR,
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 NOT NULL 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 NOT NULL PRIMARY KEY,
title VARCHAR NOT NULL,
artist_id VARCHAR NOT NULL,
year INT,
duration FLOAT);
""")
artist_table_create = ("""
CREATE TABLE IF NOT EXISTS artists(artist_id VARCHAR NOT NULL PRIMARY KEY,
name VARCHAR NOT NULL,
location VARCHAR NOT NULL,
latitude FLOAT,
longitude FLOAT);
""")
time_table_create = ("""
CREATE TABLE IF NOT EXISTS time(start_time BIGINT NOT NULL 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 songplay(songplay_id, start_time, user_id, level, song_id, artist_id, session_id, location, user_agent)
VALUES(DEFAULT, %s, %s, %s, %s, %s, %s, %s, %s)
ON CONFLICT 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 DO NOTHING;
""")
artist_table_insert = ("""
INSERT INTO artists(artist_id, name, location, latitude, longitude)
VALUES(%s, %s, %s, %s, %s)
ON CONFLICT 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 DO NOTHING;
""")
# FIND SONGS
song_select = ("""
SELECT s.song_id, a.artist_id
FROM songs AS s
JOIN artists AS 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]
# create_table_queries = [song_table_create, artist_table_create]
drop_table_queries = [songplay_table_drop, user_table_drop, song_table_drop, artist_table_drop, time_table_drop]
# drop_table_queries = [song_table_drop, artist_table_drop]