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How many colors are never used by any product?
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SELECT count(*) FROM Ref_colors WHERE color_code NOT IN ( SELECT color_code FROM products )
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Count the number of colors that are not used in any products.
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SELECT count(*) FROM Ref_colors WHERE color_code NOT IN ( SELECT color_code FROM products )
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How many events are there?
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SELECT count(*) FROM event
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List all the event names by year from the most recent to the oldest.
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SELECT name FROM event ORDER BY YEAR DESC
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What is the name of the event that happened in the most recent year?
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SELECT name FROM event ORDER BY YEAR DESC LIMIT 1
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How many stadiums are there?
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SELECT count(*) FROM stadium
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Find the name of the stadium that has the maximum capacity.
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SELECT name FROM stadium ORDER BY capacity DESC LIMIT 1
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Find the names of stadiums whose capacity is smaller than the average capacity.
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SELECT name FROM stadium WHERE capacity < (SELECT avg(capacity) FROM stadium)
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Find the country that has the most stadiums.
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SELECT country FROM stadium GROUP BY country ORDER BY count(*) DESC LIMIT 1
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Which country has at most 3 stadiums listed?
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SELECT country FROM stadium GROUP BY country HAVING count(*) <= 3
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Which country has both stadiums with capacity greater than 60000 and stadiums with capacity less than 50000?
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SELECT country FROM stadium WHERE capacity > 60000 INTERSECT SELECT country FROM stadium WHERE capacity < 50000
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How many cities have a stadium that was opened before the year of 2006?
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SELECT count(DISTINCT city) FROM stadium WHERE opening_year < 2006
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How many stadiums does each country have?
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SELECT country , count(*) FROM stadium GROUP BY country
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Which countries do not have a stadium that was opened after 2006?
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SELECT country FROM stadium EXCEPT SELECT country FROM stadium WHERE opening_year > 2006
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How many stadiums are not in country "Russia"?
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SELECT count(*) FROM stadium WHERE country != 'Russia'
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Find the names of all swimmers, sorted by their 100 meter scores in ascending order.
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SELECT name FROM swimmer ORDER BY meter_100
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How many different countries are all the swimmers from?
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SELECT count(DISTINCT nationality) FROM swimmer
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List countries that have more than one swimmer.
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SELECT nationality , count(*) FROM swimmer GROUP BY nationality HAVING count(*) > 1
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Find all 200 meter and 300 meter results of swimmers with nationality "Australia".
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SELECT meter_200 , meter_300 FROM swimmer WHERE nationality = 'Australia'
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Find the names of swimmers who has a result of "win".
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SELECT t1.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id WHERE RESULT = 'Win'
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What is the name of the stadium which held the most events?
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SELECT t1.name FROM stadium AS t1 JOIN event AS t2 ON t1.id = t2.stadium_id GROUP BY t2.stadium_id ORDER BY count(*) DESC LIMIT 1
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Find the name and capacity of the stadium where the event named "World Junior" happened.
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SELECT t1.name , t1.capacity FROM stadium AS t1 JOIN event AS t2 ON t1.id = t2.stadium_id WHERE t2.name = 'World Junior'
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Find the names of stadiums which have never had any event.
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SELECT name FROM stadium WHERE id NOT IN (SELECT stadium_id FROM event)
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Find the name of the swimmer who has the most records.
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SELECT t1.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id GROUP BY t2.swimmer_id ORDER BY count(*) DESC LIMIT 1
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Find the name of the swimmer who has at least 2 records.
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SELECT t1.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id GROUP BY t2.swimmer_id HAVING count(*) >= 2
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Find the name and nationality of the swimmer who has won (i.e., has a result of "win") more than 1 time.
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SELECT t1.name , t1.nationality FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id WHERE RESULT = 'Win' GROUP BY t2.swimmer_id HAVING count(*) > 1
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Find the names of the swimmers who have no record.
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SELECT name FROM swimmer WHERE id NOT IN (SELECT swimmer_id FROM record)
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Find the names of the swimmers who have both "win" and "loss" results in the record.
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SELECT t1.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id WHERE RESULT = 'Win' INTERSECT SELECT t1.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id WHERE RESULT = 'Loss'
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Find the names of stadiums that some Australian swimmers have been to.
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SELECT t4.name FROM swimmer AS t1 JOIN record AS t2 ON t1.id = t2.swimmer_id JOIN event AS t3 ON t2.event_id = t3.id JOIN stadium AS t4 ON t4.id = t3.stadium_id WHERE t1.nationality = 'Australia'
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Find the names of stadiums that the most swimmers have been to.
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SELECT t3.name FROM record AS t1 JOIN event AS t2 ON t1.event_id = t2.id JOIN stadium AS t3 ON t3.id = t2.stadium_id GROUP BY t2.stadium_id ORDER BY count(*) DESC LIMIT 1
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Find all details for each swimmer.
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SELECT * FROM swimmer
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What is the average capacity of the stadiums that were opened in year 2005?
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SELECT avg(capacity) FROM stadium WHERE opening_year = 2005
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How many railways are there?
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SELECT count(*) FROM railway
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List the builders of railways in ascending alphabetical order.
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SELECT Builder FROM railway ORDER BY Builder ASC
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List the wheels and locations of the railways.
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SELECT Wheels , LOCATION FROM railway
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What is the maximum level of managers in countries that are not "Australia"?
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SELECT max(LEVEL) FROM manager WHERE Country != "Australia "
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What is the average age for all managers?
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SELECT avg(Age) FROM manager
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What are the names of managers in ascending order of level?
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SELECT Name FROM manager ORDER BY LEVEL ASC
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What are the names and arrival times of trains?
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SELECT Name , Arrival FROM train
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What is the name of the oldest manager?
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SELECT Name FROM manager ORDER BY Age DESC LIMIT 1
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Show the names of trains and locations of railways they are in.
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SELECT T2.Name , T1.Location FROM railway AS T1 JOIN train AS T2 ON T1.Railway_ID = T2.Railway_ID
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Show the builder of railways associated with the trains named "Andaman Exp".
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SELECT T1.Builder FROM railway AS T1 JOIN train AS T2 ON T1.Railway_ID = T2.Railway_ID WHERE T2.Name = "Andaman Exp"
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Show id and location of railways that are associated with more than one train.
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SELECT T2.Railway_ID , T1.Location FROM railway AS T1 JOIN train AS T2 ON T1.Railway_ID = T2.Railway_ID GROUP BY T2.Railway_ID HAVING COUNT(*) > 1
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Show the id and builder of the railway that are associated with the most trains.
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SELECT T2.Railway_ID , T1.Builder FROM railway AS T1 JOIN train AS T2 ON T1.Railway_ID = T2.Railway_ID GROUP BY T2.Railway_ID ORDER BY COUNT(*) DESC LIMIT 1
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Show different builders of railways, along with the corresponding number of railways using each builder.
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SELECT Builder , COUNT(*) FROM railway GROUP BY Builder
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Show the most common builder of railways.
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SELECT Builder FROM railway GROUP BY Builder ORDER BY COUNT(*) DESC LIMIT 1
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Show different locations of railways along with the corresponding number of railways at each location.
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SELECT LOCATION , COUNT(*) FROM railway GROUP BY LOCATION
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Show the locations that have more than one railways.
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SELECT LOCATION FROM railway GROUP BY LOCATION HAVING COUNT(*) > 1
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List the object number of railways that do not have any trains.
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SELECT ObjectNumber FROM railway WHERE Railway_ID NOT IN (SELECT Railway_ID FROM train)
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Show the countries that have both managers of age above 50 and managers of age below 46.
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SELECT Country FROM manager WHERE Age > 50 INTERSECT SELECT Country FROM manager WHERE Age < 46
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Show the distinct countries of managers.
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SELECT DISTINCT Country FROM manager
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Show the working years of managers in descending order of their level.
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SELECT Working_year_starts FROM manager ORDER BY LEVEL DESC
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Show the countries that have managers of age above 50 or below 46.
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SELECT Country FROM manager WHERE Age > 50 OR Age < 46
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How many addresses are there in country USA?
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SELECT count(*) FROM addresses WHERE country = 'USA'
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Show all distinct cities in the address record.
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SELECT DISTINCT city FROM addresses
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Show each state and the number of addresses in each state.
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SELECT state_province_county , count(*) FROM addresses GROUP BY state_province_county
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Show names and phones of customers who do not have address information.
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SELECT customer_name , customer_phone FROM customers WHERE customer_id NOT IN (SELECT customer_id FROM customer_address_history)
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Show the name of the customer who has the most orders.
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SELECT T1.customer_name FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id = T2.customer_id GROUP BY T1.customer_id ORDER BY count(*) DESC LIMIT 1
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Show the product type codes which have at least two products.
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SELECT product_type_code FROM products GROUP BY product_type_code HAVING count(*) >= 2
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Show the names of customers who have both an order in completed status and an order in part status.
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SELECT T1.customer_name FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id = T2.customer_id WHERE T2.order_status_code = 'Completed' INTERSECT SELECT T1.customer_name FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id = T2.customer_id WHERE T2.order_status_code = 'Part'
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Show the name, phone, and payment method code for all customers in descending order of customer number.
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SELECT customer_name , customer_phone , payment_method_code FROM customers ORDER BY customer_number DESC
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Show the product name and total order quantity for each product.
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SELECT T1.product_name , sum(T2.order_quantity) FROM products AS T1 JOIN order_items AS T2 ON T1.product_id = T2.product_id GROUP BY T1.product_id
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Show the minimum, maximum, average price for all products.
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SELECT min(product_price) , max(product_price) , avg(product_price) FROM products
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How many products have a price higher than the average?
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SELECT count(*) FROM products WHERE product_price > (SELECT avg(product_price) FROM products)
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Show the customer name, customer address city, date from, and date to for each customer address history.
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SELECT T2.customer_name , T3.city , T1.date_from , T1.date_to FROM customer_address_history AS T1 JOIN customers AS T2 ON T1.customer_id = T2.customer_id JOIN addresses AS T3 ON T1.address_id = T3.address_id
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Show the names of customers who use Credit Card payment method and have more than 2 orders.
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SELECT T1.customer_name FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id = T2.customer_id WHERE T1.payment_method_code = 'Credit Card' GROUP BY T1.customer_id HAVING count(*) > 2
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What are the name and phone of the customer with the most ordered product quantity?
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SELECT T1.customer_name , T1.customer_phone FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id = T2.customer_id JOIN order_items AS T3 ON T3.order_id = T2.order_id GROUP BY T1.customer_id ORDER BY sum(T3.order_quantity) DESC LIMIT 1
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Show the product type and name for the products with price higher than 1000 or lower than 500.
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SELECT product_type_code , product_name FROM products WHERE product_price > 1000 OR product_price < 500
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Find the name of dorms only for female (F gender).
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SELECT dorm_name FROM dorm WHERE gender = 'F'
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What are the names of the all-female dorms?
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SELECT dorm_name FROM dorm WHERE gender = 'F'
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Find the name of dorms that can accommodate more than 300 students.
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SELECT dorm_name FROM dorm WHERE student_capacity > 300
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What are the names of all the dorms that can accomdate more than 300 students?
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SELECT dorm_name FROM dorm WHERE student_capacity > 300
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How many female students (sex is F) whose age is below 25?
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SELECT count(*) FROM student WHERE sex = 'F' AND age < 25
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How many girl students who are younger than 25?
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SELECT count(*) FROM student WHERE sex = 'F' AND age < 25
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Find the first name of students who is older than 20.
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SELECT fname FROM student WHERE age > 20
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What are the first names of all students who are older than 20?
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SELECT fname FROM student WHERE age > 20
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Find the first name of students living in city PHL whose age is between 20 and 25.
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SELECT fname FROM student WHERE city_code = 'PHL' AND age BETWEEN 20 AND 25
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What is the first name of the students who are in age 20 to 25 and living in PHL city?
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SELECT fname FROM student WHERE city_code = 'PHL' AND age BETWEEN 20 AND 25
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How many dorms are there?
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SELECT count(*) FROM dorm
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How many dorms are in the database?
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SELECT count(*) FROM dorm
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Find the number of distinct amenities.
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SELECT count(*) FROM dorm_amenity
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How many diffrent dorm amenities are there?
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SELECT count(*) FROM dorm_amenity
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Find the total capacity of all dorms.
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SELECT sum(student_capacity) FROM dorm
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What is the total student capacity of all dorms?
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SELECT sum(student_capacity) FROM dorm
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How many students are there?
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SELECT count(*) FROM student
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How many students exist?
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SELECT count(*) FROM student
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Find the average age of all students living in the each city.
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SELECT avg(age) , city_code FROM student GROUP BY city_code
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What is the average age for each city and what are those cities?
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SELECT avg(age) , city_code FROM student GROUP BY city_code
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Find the average and total capacity of dorms for the students with gender X.
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SELECT avg(student_capacity) , sum(student_capacity) FROM dorm WHERE gender = 'X'
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What is the average and total capacity for all dorms who are of gender X?
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SELECT avg(student_capacity) , sum(student_capacity) FROM dorm WHERE gender = 'X'
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Find the number of dorms that have some amenity.
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SELECT count(DISTINCT dormid) FROM has_amenity
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How many dorms have amenities?
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SELECT count(DISTINCT dormid) FROM has_amenity
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Find the name of dorms that do not have any amenity
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SELECT dorm_name FROM dorm WHERE dormid NOT IN (SELECT dormid FROM has_amenity)
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What are the names of all the dorms that don't have any amenities?
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SELECT dorm_name FROM dorm WHERE dormid NOT IN (SELECT dormid FROM has_amenity)
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Find the number of distinct gender for dorms.
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SELECT count(DISTINCT gender) FROM dorm
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How many different genders are there in the dorms?
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SELECT count(DISTINCT gender) FROM dorm
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Find the capacity and gender type of the dorm whose name has substring ‘Donor’.
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SELECT student_capacity , gender FROM dorm WHERE dorm_name LIKE '%Donor%'
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What is the student capacity and type of gender for the dorm whose name as the phrase Donor in it?
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SELECT student_capacity , gender FROM dorm WHERE dorm_name LIKE '%Donor%'
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Find the name and gender type of the dorms whose capacity is greater than 300 or less than 100.
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SELECT dorm_name , gender FROM dorm WHERE student_capacity > 300 OR student_capacity < 100
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What are the names and types of the dorms that have a capacity greater than 300 or less than 100?
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SELECT dorm_name , gender FROM dorm WHERE student_capacity > 300 OR student_capacity < 100
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