If the database is used for websites or web applications, is it secure? What backup plans do we have in the event of disaster/failure?
Is this database critical to business operations?
Who should have access to which tables? Read-only access? Write access? For centralized databases, security factors should be considered. Administrating privileges and security is a full-time job in itself and often done by database administrators (DBAs). You will need a process written in Java, Python, or another coding language to do that.Īlthough security and administration are beyond the scope of this book, centralized databases usually are concerned with these areas. If you need to store a high volume of data that updates regularly, chances are a human cannot do this task manually. Depending on the nature of the data, it can be created within your organization or received from an external party. Who/what will populate the data into these tables?ĭo we need processes to automatically populate the tables?ĭata inception has to happen somewhere. How much data will be populated into these tables? This factor is often overlooked and can easily cause a database project to fail. If the data is not maintainable and kept up to date, then the design has already failed. Populating data should be part of the planning process too. But design is not the only factor to consider. It might be a good idea to draft a diagram showing the tables and how they are related. What will their parent/child relationships be? What tables will I need to fulfill those requirements?
#SQLITESTUDIO REMOVE TABLE CONSTRAINT TRIAL#
Get a free trial today and find answers on the fly, or master something new and useful.
Join the O'Reilly online learning platform. There are critical questions that should drive your design: You need to plan carefully because bad database design is sure to cause regrets down the road. When you create your own tables to support your business, it should not be done lightly. Sometimes, though, we will want to CREATE new tables, as well as INSERT, UPDATE, and DELETE records. A SELECT statement is a read-only operation. We have done analysis operations that read data and transform it in interesting ways, but none of this physically changes the data in the tables.
#SQLITESTUDIO REMOVE TABLE CONSTRAINT HOW TO#
So far in this book, we have only learned how to be consumers of data with the SELECT statement. This is Chapter 9 from "Getting Started with SQL," by Thomas Nield any cross-reference links to other areas of the book will be unavailable, as this chapter is excerpted from a larger work. Thomas Nield will teach SQL Fundamentals for Data, a hands-on online training course for beginners on core database and SQL fundamentals, October 4-5, 2016, from noon to 3 p.m.
0 kommentar(er)
