How to handle NULL values in SQLite

5 months ago

1 minute

In SQLite, you can use IS NULL or IS NOT NULL to handle NULL values.

For example, if you want to query records that contain NULL values in a column, you can use IS NULL.

SELECT * FROM table_name
WHERE column_name IS NULL;

To search for records in a column that do not contain NULL values, you can use IS NOT NULL.

SELECT * FROM table_name
WHERE column_name IS NOT NULL;

Additionally, you can use the COALESCE function to handle NULL values. The COALESCE function takes multiple parameters and returns the first non-NULL value parameter. For example:

SELECT COALESCE(column_name, 'default_value') FROM table_name;

This allows you to replace NULL values with a default value in the query results.