CTAS: Create New Table from Select Query

What is CTAS?

CTAS (Create Table As Select) is a query in Amazon Athena that allows you to create a new table based on the results of a SELECT statement. This can be useful for creating new tables from existing data, or for transforming data into a new format.

How to Use CTAS

To use CTAS, you simply need to specify the name of the new table, followed by the AS keyword, followed by the SELECT statement that you want to use to populate the table. For example: CREATE TABLE new_table AS SELECT * FROM old_table; This query will create a new table called new_table that contains all of the data from the old_table table.

Benefits of Using CTAS

There are several benefits to using CTAS: * It can save you time and effort by automating the process of creating new tables. * It can help you to create new tables that are optimized for your specific needs. * It can help you to transform data into a new format that is more useful for your application.

Conclusion

CTAS is a powerful tool that can be used to create new tables from existing data, or to transform data into a new format. It is easy to use and can save you time and effort. If you are working with data in Amazon Athena, I encourage you to give CTAS a try.