ACF to custom database tables plugin creates a custom database table using the ACF field group and columns using field group's fields. So let's say you want to create a custom table for saving product data which should have a name, price, details, and image columns. Create a new field group in ACF and add fields for name, price, details, and image.
SQL column data type is decided based on the ACF field type. For example, for the number field, an int data type is used