Oracle Cheat Sheet

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Oracle is one of the most popular relational database management systems in the world, used by many organizations to store and manage their data. SQL is the standard language used to interact with Oracle databases, allowing users to retrieve, modify, and manipulate data. However, even experienced Oracle users may need a quick reference guide for frequently used SQL commands. In this blog post, we’ll provide a cheat sheet of commonly used Oracle SQL commands that can help you write more efficient and effective SQL queries.

SELECT

The SELECT statement is used to retrieve data from one or more tables.

SELECT column1, column2, ...
FROM table_name;

WHERE

The WHERE clause is used to filter data based on certain criteria.

SELECT column1, column2, ...
FROM table_name
WHERE condition;

GROUP BY

The GROUP BY clause is used to group rows that have the same values.

SELECT column1, COUNT(column2)
FROM table_name
GROUP BY column1;

ORDER BY

The ORDER BY clause is used to sort the results in ascending or descending order.

SELECT column1, column2, ...
FROM table_name
ORDER BY column1 DESC;

JOIN

The JOIN clause is used to combine rows from two or more tables based on a related column.

SELECT column1, column2, ...
FROM table1
JOIN table2
ON table1.column = table2.column;

INSERT

The INSERT statement is used to insert new rows into a table.

INSERT INTO table_name (column1, column2, ...)
VALUES (value1, value2, ...);

UPDATE

The UPDATE statement is used to modify existing rows in a table.

UPDATE table_name
SET column1 \= value1, column2 \= value2, ...
WHERE condition;

DELETE

The DELETE statement is used to delete existing rows from a table.

DELETE FROM table_name
WHERE condition;

Whether you’re a beginner or an experienced Oracle user, having a quick reference guide for commonly used SQL commands can save you time and improve your productivity. In this blog post, we’ve provided a cheat sheet of frequently used Oracle SQL commands, including SELECT, WHERE, GROUP BY, ORDER BY, JOIN, INSERT, UPDATE, and DELETE. While this is not an exhaustive list of all SQL commands, it covers many of the fundamental commands that every Oracle user should be familiar with. By mastering these commands, you’ll be able to write more efficient and effective SQL queries, and make the most of your Oracle database.