sql basic

files_for_lab/solutions.sql

@@ -0,0 +1,123 @@
+--Query 1
+
+SELECT client_id FROM client
+WHERE district_id = 1
+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  account_id AS "#id", amount FROM loan
+ORDER BY account_id ASC
+LIMIT 5
+;
+
+
+-- Query 6
+SELECT  account_id AS "#id", amount FROM loan
+ORDER BY account_id ASC
+LIMIT 5
+;
+
+
+-- Query 7
+SELECT  account_id AS "#id" FROM loan
+WHERE duration = 60
+ORDER BY amount ASC
+LIMIT 5
+;
+
+
+-- Query 8
+SELECT  DISTINCT k_symbol FROM "order"
+ORDER BY k_symbol;
+
+
+
+-- Query 9
+SELECT  order_id FROM "order"
+WHERE account_id == 34
+;
+
+
+-- Query 10
+SELECT DISTINCT account_id FROM "order"
+WHERE order_id >= 29540 AND order_id <= 29560;
+;
+
+
+
+-- 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(client_id) FROM client
+WHERE  district_id < 10
+GROUP by district_id
+;
+
+
+-- Query 14
+SELECT type, COUNT(card_id) FROM card
+GROUP by type
+ORDER BY COUNT(card_id) DESC
+;
+
+
+-- Query 15
+SELECT account_id, sum(amount) FROM loan
+GROUP by account_id
+ORDER BY sum(amount) DESC
+LIMIT 10
+;
+
+-- Query 16
+SELECT "date", COUNT(loan_id) FROM loan
+WHERE "date" < 930907
+GROUP BY "date"
+ORDER BY "date" DESC
+;
+
+-- Query 17
+SELECT  "date", duration, COUNT(*) as "loans count"  FROM loan
+WHERE "date" >= 971201 AND "date" < 980101
+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  type
+ORDER BY type ASC
+;