Complete SQL Topics for Data Analysis
-> https://t.me/sqlspecialist/523
Today, we will learn about Joins in more detail.
Joins allow you to combine rows from two or more tables based on related columns. There are several types of joins:
#### INNER JOIN:
Returns rows when there is a match in both tables.
SELECT column1, column2 FROM table1 INNER JOIN table2 ON table1.column = table2.column;#### LEFT JOIN (or LEFT OUTER JOIN):
Returns all rows from the left table and matching rows from the right table.
SELECT column1, column2 FROM table1 LEFT JOIN table2 ON table1.column = table2.column;#### RIGHT JOIN (or RIGHT OUTER JOIN):
Returns all rows from the right table and matching rows from the left table.
SELECT column1, column2 FROM table1 RIGHT JOIN table2 ON table1.column = table2.column;#### FULL JOIN (or FULL OUTER JOIN):
Returns all rows when there is a match in either table.
SELECT column1, column2 FROM table1 FULL JOIN table2 ON table1.column = table2.column;Joins are powerful for combining data from different sources.
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