correct the error

Author: smartcoder207

SQL-Mockup-Practice/test_sqlite.sql

@@ -0,0 +1,149 @@
+Project Requirements
+
+
+
+Quiz-2:
+
+SELECT email_domain, COUNT(*) AS "Top 25 Schools"
+FROM users
+GROUP BY 1
+ORDER BY 2 DESC
+LIMIT 25;
+
+SELECT city, COUNT(user_id) as no_of_users
+FROM users
+WHERE city = 'New York';
+
+SELECT mobile_app, COUNT(mobile_app) as no_of_users
+FROM users
+GROUP BY 1;
+
+SELECT strftime('%H', sign_up_at), COUNT(*)
+FROM users
+GROUP BY 1;
+
+
+WITH cpp AS 
+(
+SELECT u.email_domain, COUNT(*) AS cpp
+FROM users u
+JOIN progress p
+ON u.user_id = p.user_id
+WHERE p.learn_cpp = 'started' OR p.learn_cpp = 'completed'
+GROUP BY 1
+ORDER BY 1
+), 
+sql AS 
+(
+SELECT u.email_domain, COUNT(*) AS sql
+FROM users u
+JOIN progress p
+ON u.user_id = p.user_id
+WHERE p.learn_sql = 'started' OR p.learn_sql = 'completed'
+GROUP BY 1
+ORDER BY 1
+),
+html AS 
+(
+SELECT u.email_domain, COUNT(*) AS html
+FROM users u
+JOIN progress p
+ON u.user_id = p.user_id
+WHERE p.learn_html = 'started' OR p.learn_html = 'completed'
+GROUP BY 1
+ORDER BY 1
+),
+javascript AS 
+(
+
+SELECT u.email_domain, COUNT(*) AS javascript
+FROM users u
+JOIN progress p
+ON u.user_id = p.user_id
+WHERE p.learn_javascript = 'started' OR p.learn_javascript = 'completed'
+GROUP BY 1
+ORDER BY 1
+),
+java AS 
+(
+
+SELECT u.email_domain, COUNT(*) AS java
+FROM users u
+JOIN progress p
+ON u.user_id = p.user_id
+WHERE p.learn_java = 'started' OR p.learn_java = 'completed'
+GROUP BY 1
+ORDER BY 1
+)
+
+SELECT c.email_domain, c.cpp, s.sql, h.html, j.javascript, i.java
+FROM cpp c
+JOIN sql s
+ON c.email_domain = s.email_domain
+JOIN html h
+ON c.email_domain = h.email_domain
+JOIN javascript j
+ON c.email_domain = j.email_domain
+JOIN java i
+ON c.email_domain = i.email_domain
+LIMIT 10;
+
+WITH joined AS 
+(
+SELECT *
+FROM users u
+JOIN progress p
+ON u.user_id = p.user_id
+),
+ny_cpp AS 
+(
+
+SELECT city, COUNT(*) AS cpp_count
+FROM joined
+WHERE (learn_cpp = 'completed' OR learn_cpp = 'started') AND (city = 'New York' OR city = 'Chicago')
+GROUP BY 1
+),
+ny_sql AS 
+(
+
+SELECT city, COUNT(*) AS sql_count
+FROM joined
+WHERE (learn_sql = 'completed' OR learn_sql = 'started') AND (city = 'New York' OR city = 'Chicago')
+GROUP BY 1
+),
+ny_html AS
+(
+
+SELECT city, COUNT(*) AS html_count
+FROM joined
+WHERE (learn_html = 'completed' OR learn_html = 'started') AND (city = 'New York' OR city = 'Chicago')
+GROUP BY 1
+),
+ny_javascript AS
+( 
+
+SELECT city, COUNT(*) AS javascript_count
+FROM joined
+WHERE (learn_javascript = 'completed' OR learn_javascript = 'started') AND (city = 'New York' OR city = 'Chicago')
+GROUP BY 1
+),
+ny_java AS
+(
+
+SELECT city, COUNT(*) AS java_count
+FROM joined
+WHERE (learn_java = 'completed' OR learn_java = 'started') AND (city = 'New York' OR city = 'Chicago')
+GROUP BY 1
+)
+
+SELECT c.city, c.cpp_count, s.sql_count, h.html_count, j.javascript_count, i.java_count
+FROM ny_cpp c
+JOIN ny_sql s
+ON c.city = s.city
+JOIN ny_html h
+ON c.city = h.city
+JOIN ny_javascript j
+ON c.city = j.city
+JOIN ny_java i
+ON c.city = i.city
+;