Database Management - Lecture 3 - SQL Aggregate Functions, max(). min(), avg(), count(), sum(), Join, Left join, LEFT (OUTER) JOIN, RIGHT (OUTER) JOIN, FULL (OUTER) JOIN

1. WEB DEVELOPMENT

2. PHP
PRESENTATORS
MD. AL-MAMUN SARKAR

3. SQL

4. Aggregate Functions

5. MIN() and MAX()
SELECT MIN(column_name)
FROM table_name
WHERE condition;
SELECT MAX(column_name)
FROM table_name
WHERE condition;

6. COUNT(), AVG() and SUM()
SELECT COUNT(column_name)
FROM table_name
WHERE condition;
SELECT AVG(column_name)
FROM table_name
WHERE condition;
SELECT SUM(column_name)
FROM table_name
WHERE condition;

7. Group By
SELECT column_name(s)
FROM table_name
WHERE condition
GROUP BY column_name(s);
SELECT COUNT(CustomerID), Country
FROM Customers
GROUP BY Country;

8. Union
SELECT column_name(s) FROM table1
UNION ALL
SELECT column_name(s) FROM table2;

9. Join
(INNER) JOIN
LEFT (OUTER) JOIN
1
2
RIGHT (OUTER) JOIN3
FULL (OUTER) JOIN4

10. Join

11. LIMIT
SELECT *
FROM students
LIMIT 0, 2

12. QUESTION
?

13. THANK
YOU