Question: Suppose you have a column with a Boolean data type and you want to change its data type so you can input values of TRUE

Suppose you have a column with a Boolean data type and you want to change its data type so you can input values of TRUE or FALSE.
Which data type should you change it to?
Assume the following starting data types for these columns:
billing_city: VARCHAR(100) billing_state: VARCHAR(2) invoice_date: DATE total: DECIMAL

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