Adding the “Not NULL Constraint” to Snowflake tables can lead to inconsistency. We will perform data validation in the application layer to avoid those inconsistencies. In this blog, you will learn to add “NOT NULL Constraint”.
NOT NULL Constraints will add an additional layer of data validation.
While we can carry out the validation in our application layer, bear in mind that inconsistencies can occur; someone forgets to add validation and remove it accidentally, or avoid validations in the console and insert the nulls. The only method is to implement it in our column definition. We are also protected if we are validating the nulls on the database layer.
|Looking forward to a career in a cloud data warehousing domain? Check out the "Snowflake Training" and get certified today|
To apply NOT NULL for the column in the Snowflake, we will use the
ALTER TABLE <table_name> ALTER <column_name> command and reiterate the column definition, add the NOT NULL attribute.
alter table products1 alter type not null;
|Preparing for Snowflake Interview? Here are Top Snowflake Interview Questions and Answers|
Constraints will be applied to columns of the tables. As per our requirement and column, we will apply “Not Null Constraint.” I hope this information provides you with the required information about adding “Not Null Constraint”.
Snowflake Related Articles
Stay updated with our newsletter, packed with Tutorials, Interview Questions, How-to's, Tips & Tricks, Latest Trends & Updates, and more ➤ Straight to your inbox!
|Snowflake Training||Dec 09 to Dec 24||View Details|
|Snowflake Training||Dec 12 to Dec 27||View Details|
|Snowflake Training||Dec 16 to Dec 31||View Details|
|Snowflake Training||Dec 19 to Jan 03||View Details|
Copyright © 2013 - 2023 MindMajix Technologies