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SQL ("Structured Query Language") is an ANSI Standard computer language commonly used to access data stored in databases. SQL works with relational databases which all organize data into tables, rows, and columns which correspond to files, records and fields. Learning SQL opens a world of relational database management systems (RDBMS) to you such as:
Each RDBMS 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.
Relational databases and SQL began in the 1970s. Dr. E.F. "Ted" of IBM is known as the father of relational databases. He described a relational model for databases in 1970. IBM worked to develop Codd's ideas and released a product named System/R in 1978. Other companies organized and created relational database products before IBM released System/R. The first released Relational Software's product called Oracle and the second released was Relational Technology's product called Ingres. IBM then released follow up products in 1982 named SQL/DS and DB2. Oracle (now from Oracle Inc.) and DB2 continue today in advanced forms while the Ingres technology was acquired by Computer Associates. |
SQL OVERVIEW
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
SQL SYNTAX
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