Store Zip Code Log For Free

For example, if you define an attribute, Roll_Number char(3), all entries in this column must contain three characters. varchar: For attributes like Name and Address, you should use ?varchar(n)?, where ?n? is used to define the maximum length, as it gives flexibility for the length of data.

1 Expert Answer Always make your zip codes text. Zip codes on the east coast often start with a leading zero, and is a user types a leading zero into a number field, the leading zero(es) will get dropped!

Examples of nominal variables include: genotype, blood type, zip code, gender, race, eye color, political party.

Zip codes are always 5 characters, hence you would need a CHAR datatype, rather than VARCHAR. The first takes 5 bytes per zip code. The second takes only 3 bytes per zip code. The ZEROFILL option is necessary for zip codes with leading zeros.

Zip codes are always 5 characters, hence you would need a CHAR datatype, rather than VARCHAR. The first takes 5 bytes per zip code. The second takes only 3 bytes per zip code. The ZEROFILL option is necessary for zip codes with leading zeros.

The right data type for a postal code is a string.

When it comes to USA zip codes, they are always 5 digits long. However, sometimes these codes may also include leading zeros. If you store these zip codes as integers, any leading zeros would be stripped, resulting in missing data. As such, it's usually better to store zip codes as 5 character strings.

B Number data type should be chosen for a zip code field in a table.