sql_queries.py

# 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, \
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(1) NOT NULL, \
level varchar \
);""")

song_table_create = ("""
CREATE TABLE IF NOT EXISTS songs(
song_id varchar PRIMARY KEY, \
title varchar NOT NULL, \
artist_id varchar NOT NULL, \
year int NOT NULL, \
duration numeric NOT NULL
);
""")

artist_table_create = ("""
CREATE TABLE IF NOT EXISTS artists(
artist_id varchar 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 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 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 songs.song_id, artists.artist_id \
FROM songs
JOIN artists ON songs.artist_id = artists.artist_id \
WHERE songs.title = %s AND artists.name = %s AND songs.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]