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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 varchar NOT NULL,
level varchar,
song_id varchar,
artist_id varchar,
session_id varchar,
location varchar,
user_agent varchar
);
""")
user_table_create = ("""CREATE TABLE IF NOT EXISTS users (
user_id varchar PRIMARY KEY,
first_name varchar,
last_name varchar,
gender varchar,
level varchar
);
""")
song_table_create = ("""CREATE TABLE IF NOT EXISTS songs (
song_id varchar PRIMARY KEY,
title varchar,
artist_id varchar,
year int,
duration float
);
""")
artist_table_create = ("""CREATE TABLE IF NOT EXISTS artists (
artist_id varchar PRIMARY KEY,
name varchar,
location varchar,
latitude float,
longitude float
);
""")
time_table_create = ("""CREATE TABLE IF NOT EXISTS time (
start_time bigint PRIMARY KEY,
hour int,
day int,
week int,
month int,
year int,
weekday int
);
""")
# 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);
""")
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, A.artist_id 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]