SQL Tutorial
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SQL is a standard computer language for accessing and manipulating
databases.
In this tutorial you will learn how to use SQL to access and manipulate data in Oracle,
Sybase, SQL Server, DB2, Access, and other database systems.
Start learning SQL now!
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SQL Intro
An introduction to SQL.
SQL SELECT
How the SELECT statement is used to select data from a database.
SQL WHERE
How the WHERE clause is used to conditionally select data.
SQL INSERT INTO
How the INSERT INTO statement inserts new records (rows) into a database table.
SQL UPDATE
How to modify data in a database using the UPDATE statement.
SQL DELETE
How to delete records (rows) in a database, using the DELETE statement.
SQL Try-It-Yourself
Try some SQL statements of your own.
SQL ORDER BY
The ORDER BY keyword is used to sort the result.
SQL AND & OR
AND and OR join two or more conditions in a WHERE clause.
SQL IN
The IN operator may be used if you know the exact value(s) to search for.
SQL BETWEEN
The BETWEEN operator selects a range of data between two values.
SQL ALIAS
Aliases can be used for column names and table names.
SQL JOIN
How to use the JOIN operator to select data from two or more tables.
SQL UNION
The UNION operator is used to select related information from two tables.
SQL CREATE
How to create a new database and / or a new database table.
SQL DROP
How to drop (delete) a database and /or a database table.
SQL ALTER
How to user ALTER to add or delete table columns.
SQL Functions
SQL has a lot of built-in functions for counting and calculations.
SQL GROUP BY
How to use GROUP BY to group aggregated data.
SQL SELECT INTO
How to use SELECT INTO to save selected data in tables (create backup copies).
SQL CREATE VIEW
How to create a virtual table using CREATE VIEW.
SQL Server
About Database Management Systems (DBMS).
SQL Quick Reference
An SQL Quick Reference. Print it, fold it, and put it in your pocket.
SQL Summary
A summary of this tutorial.
Start SQL quiz!
Test your SQL skills at W3Schools!
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