Database Essentials using Postgres - Creating Tables and Indexes - Truncating Tables

Databases Postgres
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In this article, we will explore the concept of truncating tables in a database. Truncating tables is a quick and efficient way to remove all data from a table.

Explanation for the video

[embed the video here]

Key Concepts Explanation

If you want to delete the data from a table entirely, then TRUNCATE is the fastest way to do so.

TRUNCATE TABLE table_name;

Truncate operations can be rolled back.

ROLLBACK;

One cannot truncate the table with only DML permissions.

TRUNCATE TABLE table_name;

Hands-On Tasks

Here are some hands-on tasks for you to try out:

  1. Use TRUNCATE to remove all data from a table.
  2. Try using TRUNCATE with CASCADE to remove data from child tables as well.

Conclusion

In summary, truncating tables is a useful operation when you need to quickly delete all data from a table in a database. It is particularly helpful in scenarios like data engineering or ETL applications. Remember to practice these concepts and feel free to engage with the community for further learning.

Watch the video tutorial here