SQL Scripts: Uses & Examples

Instructor: David Gloag
In this lesson, we'll take a look at SQL scripts, give some examples of them, and explain what they are used for. At the end, you should have a good understanding of this important topic.

Reducing Repetition

We seem to hate repetition. But unfortunately, it happens a lot. We go to work each day, we rotate through the same clothes week in and week out, and we eat a lot of the same foods. We are definitely creatures of habit. This trend also applies to the tools we use, like our computers. We use them to help us with the multitude of repetitive tasks that seem to come our way. Most involve information of some sort, whether it is searching for specific things, updating content, or simply keeping abreast of world events. To reduce the repetition when computers are involved, we use things like SQL scripts.

What is a SQL Script?

A SQL script is a collection of SQL commands that are stored in a text file and perform some operation or task. These tasks are usually repetitive, meaning that they get executed over and over on a regular basis. The commands contained in a script can be any of those supported by the SQL language. When combined they are typically flexible enough to be used in a variety of related situations. This has a number of advantages including:

  • Ease of Use - The scripts can be saved and loaded when needed.
  • Consistent Operation - If they work correctly the first time, they will work correctly every time.
  • Reduced Errors - Manually entered commands are susceptible to human error. Scripts reduce that possibility.
  • Scheduled Operation - Scripts can be scheduled to run at a time when it is convenient, or when a human isn't present.

Uses of SQL Scripts

SQL scripts have a variety of uses and are only limited by the programmer's imagination and the SQL commands available. Uses include things like:

  • Backups - This is a duplicate of the information in a database formatted so that it can be easily restored if there is an issue.
  • Reports - Businesses generate summaries of their information on a regular basis to facilitate correct operation of the business.
  • Periodic Updates - Information changes regularly and scripts can be used to add to or update that information.
  • Synchronization - With the global nature of business today, multiple servers are needed in geographically diverse locations. Scripts can be used to ensure the information is current at all locations.

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