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Count SUM MAX MIN AVG

The document discusses several SQL aggregation functions - COUNT(), SUM(), AVG(), MAX(), MIN() - and how to use them to aggregate and analyze data from tables. It provides examples of using each function in a SELECT statement, optionally combined with other clauses like WHERE, GROUP BY, HAVING and ORDER BY, to count, sum, find the average, maximum or minimum of columns in a table.

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AKASH JAISWAL
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77 views3 pages

Count SUM MAX MIN AVG

The document discusses several SQL aggregation functions - COUNT(), SUM(), AVG(), MAX(), MIN() - and how to use them to aggregate and analyze data from tables. It provides examples of using each function in a SELECT statement, optionally combined with other clauses like WHERE, GROUP BY, HAVING and ORDER BY, to count, sum, find the average, maximum or minimum of columns in a table.

Uploaded by

AKASH JAISWAL
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Firefox https://www.codecademy.com/learn/learn-sql/modules/learn-sql-aggregat...

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COUNT()
●
SUM()
●
MAX()
●
MIN()
●
AVG()

COUNT()
COUNT()
SELECT COUNT(*)
FROM employees
WHERE experience < 5;

* COUNT(*)
COUNT(column) NULL

SUM()
SUM()
SELECT SUM(salary)
FROM salary_disbursement;

AVG()
AVG()
SELECT AVG(salary)
salary FROM employees
WHERE experience < 5;

1 of 3 6/22/2020, 7:52 PM
Firefox https://www.codecademy.com/learn/learn-sql/modules/learn-sql-aggregat...

ROUND()
ROUND()
SELECT year,
ROUND(AVG(rating), 2)
FROM movies
WHERE year = 2015;

GROUP BY
GROUP BY
SELECT rating,
COUNT(*)
GROUP BY FROM movies
FROM WHERE GROUP BY rating;

ORDER BY LIMIT

GROUP BY ORDER BY
SELECT COUNT(*) AS 'total_movies',
SELECT rating
FROM movies
GROUP BY 2
●
GROUP BY 2 rating ORDER BY 1;
●
ORDER BY 1 total_movies

HAVING
HAVING
SELECT year,
GROUP BY
COUNT(*)
HAVING
FROM movies
GROUP BY year
HAVING COUNT(*) > 5;

MAX()
MAX()
SELECT MAX(amount)
FROM transactions;
amount

2 of 3 6/22/2020, 7:52 PM
Firefox https://www.codecademy.com/learn/learn-sql/modules/learn-sql-aggregat...

MIN()
MIN()
SELECT MIN(amount)
amount FROM transactions;

transactions

3 of 3 6/22/2020, 7:52 PM

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