The Data Management Center

SQL Basic Tutorial


David Haertzen David Haertzen, Tutorial Author
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SQL ("Structured Query Language") is an ANSI Standard computer language commonly used to access data stored in databases. With SQL you can:

Each RDBMS (DB2, MySQL, Oracle, SQL Server) follows the ANSI Standard to a large degree and then add value adding features. This tutorial will focus on the ANSI Standard and avoid vendor specific features.

SQL Syntax and Conventions

SQL statements are represented as text.

SQL statements have keywords that must be spelled following rules. The keywords can be upper or lower case - SQL is not case sensitive. By convention and to improve readability, this tutorial spells SQL keywords in upper case.

SQL statements are independent of text lines. A single SQL statement can be placed on one text line or on multiple. In addition, multiple SQL statements can be combined on a single text line. By convention and to improve readability, this tutorial does not put more than one SQL statement on a single text line. Further, SQL statements are often broken into multiple lines.

A SQL statements may be terminated by a semi-colon or the word 'GO'. This tutorial leaves these terminators out. Please supply as needed.

HOME | SQL OVERVIEW | SQL BASICS | SQL ADMINISTRATION | SQL ADVANCED | SQL SYNTAX
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SQL OVERVIEW
SQL SYNTAX
SQL BOOKREVIEWS
SQL BASICS
SQL SELECT
SQL WHERE
SQL INSERT
SQL UPDATE
SQL DELETE
SQL ADMINISTRATION
SQL CREATE DATABASE
SQL DROP DATABASE
SQL CREATE TABLE
SQL ALTER TABLE
SQL DROP TABLE
SQL CREATE INDEX
SQL DROP INDEX
SQL ADD FOREIGN KEY
SQL DROP FOREIGN KEY
SQL CREATE VIEW
SQL DROP VIEW
SQL ADVANCED
SQL CONCAT
SQL SUBSTRING
SQL TRIM
SQL AND & OR
SQL IN
SQL BETWEEN
SQL LIKE
SQL DISTINCT
SQL GROUP BY
SQL AGGREGATE
SQL HAVING
SQL ORDER BY
SQL JOIN
SQL OUTER JOIN

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