How do I preserve leading zeros in a seed?

If you need to preserve leading zeros (for example in a zipcode or mobile number):

1. v0.16.0 onwards: Include leading zeros in your seed file, and use the column_types configuration with a varchar datatype of the correct length.
2. Prior to v0.16.0: Use a downstream model to pad the leading zeros using SQL, for example: lpad(zipcode, 5, '0')