Updating a relational database php

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Class DB_Table_Database extends abstract base class DB_Table_Base.Methods or properties that are inherited from DB_Table_Base are noted as such, and are indicated in the table of contents of this page with the notation "(from DB_Table_Base)".Kevin also covers the basic CRUD routines for updating a database, debugging techniques, and usable user interfaces.Along the way, he provides practical advice, offers examples of best practices, and demonstrates refactoring techniques to improve existing code.

It describes the names of the tables, columns, primary keys and foreign keys.create table company ( id integer auto_increment, name char(20), employee_of_the_month integer, primary key(id) ); create table department ( id integer auto_increment, name char(20), location char(10), number integer(3), co_id integer, primary key(id) ); create table employee ( id integer auto_increment, name char(20), SN char(4), manager tinyint(1), dept_id integer, primary key(id) );create table company ( \ id integer not null generated by default as identity, \ name varchar(20), \ employee_of_the_month integer, \ primary key(id) ) create table department ( \ id integer not null generated by default as identity, \ name varchar(20), \ location varchar(10), \ number integer, \ co_id integer, \ primary key(id) ) create table employee ( \ id integer not null generated by default as identity, \ name varchar(20), \ SN char(4), \ manager smallint, \ dept_id integer, \ primary key(id) ) column on the employee table is they should contain the primary key of their containing company or department record, respectively. There is a third foreign key in this example, that from the columns represent multi-valued relationships: a company can contain many departments and a department can contain many employees.This distinction will become evident when the remainder of the metadata picks out the company-department and department-employee relationships as containment relationships.The author has also added updated installation instructions for Mac OS X Mountain Lion and Windows 8.The topics and end project are the same, but the code is slightly different.

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