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Update questions.sql #79

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94e562a
Update questions.sql
UzMatic Nov 20, 2024
231190d
Update questions.sql
UzMatic Nov 20, 2024
05baf8a
Update questions.sql
UzMatic Nov 20, 2024
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12 changes: 10 additions & 2 deletions SQL Deep Dive/BETWEEN + AND/questions.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,17 @@

/*
* Write your query here
*/
*/SELECT firstname, lastname, age, income
FROM customers
where (age BETWEEN 30 and 50)
AND (income < 50000);

-- What is the average income between the ages of 20 and 50? (Including 20 and 50)
/*
* Write your query here
*/
*/SELECT AVG(income)
FROM customers
WHERE (age BETWEEN 20 AND 50);

The average income between the ages 20 and 50 is = 59361.925908612832

10 changes: 7 additions & 3 deletions SQL Deep Dive/IN/questions.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,9 @@
* Table: orders
* Question: How many orders were made by customer 7888, 1082, 12808, 9623
*/

SELECT * FROM orders;
select *
FROM orders
WHERE customerid IN(7888, 1082, 12808, 9623);


/*
Expand All @@ -13,4 +14,7 @@ SELECT * FROM orders;
* Question: How many cities are in the district of Zuid-Holland, Noord-Brabant and Utrecht?
*/

SELECT * FROM city;
SELECT COUNT("name") AS Cities
FROM city
WHERE district IN ('Zuid-Holland', 'Noord-Brabant', 'Utrecht');