Create solutions.sql

solutions.sql

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+-- Query 1: Get the client_id values of the first 5 clients from district_id = 1
+SELECT client_id
+FROM client
+WHERE district_id = 1
+ORDER BY client_id
+LIMIT 5;
+
+-- Query 2: Get the client_id of the last client from district_id = 72
+SELECT client_id
+FROM client
+WHERE district_id = 72
+ORDER BY client_id DESC
+LIMIT 1;
+
+-- Query 3: Get the 3 lowest loan amounts
+SELECT amount
+FROM loan
+ORDER BY amount
+LIMIT 3;
+
+-- Query 4: Get distinct loan status values in alphabetical order
+SELECT DISTINCT status
+FROM loan
+ORDER BY status ASC;
+
+-- Query 5: Get the loan_id with the highest payment
+SELECT loan_id
+FROM loan
+ORDER BY payments DESC
+LIMIT 1;
+
+-- Query 6: Get account_id and amount for the lowest 5 account_ids in the loan table
+SELECT account_id, amount
+FROM loan
+ORDER BY account_id
+LIMIT 5;
+
+-- Query 7: Get account_ids with the lowest loan amounts where duration = 60
+SELECT account_id
+FROM loan
+WHERE duration = 60
+ORDER BY amount
+LIMIT 5;
+
+-- Query 8: Get unique k_symbol values from the order table (excluding nulls)
+SELECT DISTINCT k_symbol
+FROM `order`
+WHERE k_symbol IS NOT NULL
+ORDER BY k_symbol;
+
+-- Query 9: Get order_ids for account_id = 34
+SELECT order_id
+FROM `order`
+WHERE account_id = 34;
+
+-- Query 10: Get distinct account_ids with orders between order_id 29540 and 29560
+SELECT DISTINCT account_id
+FROM `order`
+WHERE order_id BETWEEN 29540 AND 29560;
+
+-- Query 11: Get distinct amounts sent to account_to = 30067122
+SELECT DISTINCT amount
+FROM `order`
+WHERE account_to = 30067122;
+
+-- Query 12: Get the 10 most recent transactions for account_id = 793
+SELECT trans_id, date, type, amount
+FROM trans
+WHERE account_id = 793
+ORDER BY date DESC
+LIMIT 10;
+
+-- Query 13: Count clients per district_id (where district_id < 10), sorted ascending
+SELECT district_id, COUNT(*) AS client_count
+FROM client
+WHERE district_id < 10
+GROUP BY district_id
+ORDER BY district_id;
+
+-- Query 14: Count number of cards per type, ordered by most frequent first
+SELECT type, COUNT(*) AS card_count
+FROM card
+GROUP BY type
+ORDER BY card_count DESC;
+
+-- Query 15: Top 10 account_ids by sum of their loan amounts
+SELECT account_id, SUM(amount) AS total_amount
+FROM loan
+GROUP BY account_id
+ORDER BY total_amount DESC
+LIMIT 10;
+
+-- Query 16: Count loans per day before 930907, ordered by date descending
+SELECT date, COUNT(*) AS loan_count
+FROM loan
+WHERE date < 930907
+GROUP BY date
+ORDER BY date DESC;
+
+-- Query 17: Count loans per duration per day in December 1997
+SELECT date, duration, COUNT(*) AS loan_count
+FROM loan
+WHERE date BETWEEN 971201 AND 971231
+GROUP BY date, duration
+ORDER BY date, duration;
+
+-- Query 18: Sum of transaction amounts by type for account_id = 396
+SELECT account_id, type, SUM(amount) AS total_amount
+FROM trans
+WHERE account_id = 396
+GROUP BY type
+ORDER BY type;