SQL lab completed

files_for_lab/solutions.sql

@@ -0,0 +1,115 @@
+-- LAB | SQL basics
+
+-- Query 1
+SELECT client_id
+FROM client
+WHERE district_id = 1
+ORDER BY client_id ASC
+LIMIT 5;
+
+-- Query 2
+SELECT client_id
+FROM client
+WHERE district_id = 72
+ORDER BY client_id DESC
+LIMIT 1;
+
+-- Query 3
+SELECT amount
+FROM loan
+ORDER BY amount ASC
+LIMIT 3;
+
+-- Query 4
+SELECT DISTINCT status
+FROM loan
+ORDER BY status ASC;
+
+-- Query 5
+SELECT loan_id
+FROM loan
+ORDER BY payments DESC
+LIMIT 1;
+
+-- Query 6
+SELECT account_id, amount
+FROM loan
+ORDER BY account_id ASC
+LIMIT 5;
+
+-- Query 7
+SELECT account_id
+FROM loan
+WHERE duration = 60
+ORDER BY amount ASC
+LIMIT 5;
+
+-- Query 8
+SELECT DISTINCT k_symbol
+FROM `order`
+WHERE k_symbol != ''
+ORDER BY k_symbol ASC;
+
+-- Query 9
+SELECT order_id
+FROM `order`
+WHERE account_id = 34;
+
+-- Query 10
+SELECT DISTINCT account_id
+FROM `order`
+WHERE order_id BETWEEN 29540 AND 29560
+ORDER BY account_id ASC;
+
+-- Query 11
+SELECT amount
+FROM `order`
+WHERE account_to = 30067122;
+
+-- Query 12
+SELECT trans_id, date, type, amount
+FROM trans
+WHERE account_id = 793
+ORDER BY date DESC
+LIMIT 10;
+
+-- Query 13
+SELECT district_id, COUNT(*) AS number_of_clients
+FROM client
+WHERE district_id < 10
+GROUP BY district_id
+ORDER BY district_id ASC;
+
+-- Query 14
+SELECT type, COUNT(*) AS number_of_cards
+FROM card
+GROUP BY type
+ORDER BY number_of_cards DESC;
+
+-- Query 15
+SELECT account_id, SUM(amount) AS total_amount
+FROM loan
+GROUP BY account_id
+ORDER BY total_amount DESC
+LIMIT 10;
+
+-- Query 16
+SELECT date, COUNT(*) AS number_of_loans
+FROM loan
+WHERE date < 930907
+GROUP BY date
+ORDER BY date DESC;
+
+-- Query 17
+SELECT date, duration, COUNT(*) AS number_of_loans
+FROM loan
+WHERE date BETWEEN 971201 AND 971231
+GROUP BY date, duration
+ORDER BY date ASC, duration ASC;
+
+-- Query 18
+SELECT account_id, type, SUM(amount) AS total_amount
+FROM trans
+WHERE account_id = 396
+GROUP BY account_id, type
+ORDER BY type ASC;