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 integer,
location varchar,
user_agent varchar);
""")

user_table_create = ("""Create table IF NOT EXISTS users(user_id int 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 integer,
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 integer,
day integer,
week integer,
month integer,
year integer,
weekday integer);
""")

# 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 song_id, artists.artist_id FROM songs 
INNER JOIN artists ON artists.artist_id = songs.artist_id
WHERE title = (%s) AND name = (%s) AND 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]