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How to Use the Assessment to Analyze ZIP Code Data Select an Area to Assess at the ZIP code level. Select Indicators. Generate the Assessment and Show ZIP code Data. Download ZIP code Data. Learn More About ZIP codes, ZCTAs, and Calculations.

You can use varchar column type for Zipcode in SQL Server. Varchar data type accept both numbers and characters.

The most complete ZIP Code is a nine-digit number consisting of five digits, a hyphen, and four digits, which the USPS describes by its trademark ZIP+4. The correct format for a numeric ZIP+4 code is five digits, a hyphen, and four digits.

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.

United States ZIP codes are five numerical digits long. ZIP+4 codes, also known as add-on or plus-four codes, include four additional digits that identify a geographic segment within a ZIP code delivery area. The first digit in a ZIP code represents a defined group of U.S. states.

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.

As of 1963, zip codes' numbers are determined by a few factors: the area, the regional postal facility and the local zone. The first number of the five-digit code signifies the region which the address is located in, a number that grows from the east coast to the west.