Oracle Inner join | Inner Join - oracle tutorial - sql tutorial
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What is Oracle INNER JOINS ?
- Oracle JOINS are used to retrieve data from multiple tables.
- Oracle INNER JOINS return all rows from multiple tables where the join condition is met.
- Oracle INNER JOIN (or sometimes called simple join).
Syntax:
SELECT columns
FROM table1
INNER JOIN table2
ON table1.column = table2.column;
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Example:
SELECT wikitechy_employee.id, wikitechy_employee.name, orders.orderid
FROM wikitechy_employee
INNER JOIN orders
ON wikitechy_employee.id = orders.id;
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Sample Database:
- We have a table called wikitechy_employee with four fields (id, name, position, and city). It contains the following data:
- We have another table called orders with three fields (id, customer_name, and orderid).
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INNER JOIN:
- INNER JOIN example would return all rows from the wikitechy_employee and orders tables where there is a matching Id value in both the wikitechy_employee and orders tables.
- The rows of Indhu and Vinoth is displayed from the table since the id 333, 117 does exist in both the tables.
Oracle ALL Joins
Oracle Join Query - Inner Join Query - Left Outer Join Query - Right Outer Join Query - Full Outer Join Query