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AND & OR Operator - (Oracle Misc)

The AND and OR operators in Oracle are used to perform logical operations on two or more conditions. These operators are used in WHERE clauses to filter the data that is returned from a query.

Syntax

The syntax for using the AND and OR operators in Oracle is as follows:

SELECT column1, column2, ...
FROM table_name
WHERE condition1 AND/OR condition2 AND/OR condition3 ...;

Here, condition1, condition2, condition3, etc. are the conditions to be checked using the AND and OR operators.

Example

Here are examples of using the AND and OR operators in Oracle:

-- Using the AND operator
SELECT first_name, last_name, salary
FROM employees
WHERE department_id = 20 AND salary > 5000;

-- Using the OR operator
SELECT first_name, last_name, salary
FROM employees
WHERE department_id = 20 OR salary > 5000;

-- Using both the AND and OR operators
SELECT first_name, last_name, salary
FROM employees
WHERE department_id = 20 AND (salary > 5000 OR commission_pct > 0.1);

Output

The output of each query will depend on the data in the employees table. The queries will return the data that matches the specified conditions.

Explanation

In the above examples, we are selecting data from the employees table. In the first query, we are using the AND operator to select employees from department 20 with a salary greater than 5000. In the second query, we are using the OR operator to select employees from department 20 or with a salary greater than 5000. In the third query, we are using both the AND and OR operators to select employees from department 20 with a salary greater than 5000 or with a commission percentage greater than 0.1.

Use

The AND and OR operators are commonly used in SQL queries to filter data from tables. They allow for complex conditions to be combined to select exactly the data that is needed.

Important Points

  • The AND and OR operators are used in WHERE clauses to filter data from tables.
  • The AND operator requires all conditions to be true before a row is returned.
  • The OR operator requires at least one condition to be true before a row is returned.
  • Parentheses can be used to group conditions together when using both AND and OR.

Summary

In summary, the AND and OR operators in Oracle are used in WHERE clauses to perform logical operations on two or more conditions. These operators are commonly used in SQL queries to filter data from tables. The AND operator requires all conditions to be true before a row is returned, while the OR operator requires at least one condition to be true. Parentheses can be used to group conditions together when using both AND and OR.

AND OperatorBETWEEN Operator
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