# curated.boundary_zipcode Houston-area zipcodes (294 rows; category: Boundaries & demographics; geometry column `geom` (MultiPolygon, EPSG:4326)) Fields (expression | type | filled/distinct in a sample | values or examples): - objectid | bigint | 294/294 | e.g.: 247; 13; 121 - attrs->>'Zip_Code' | string | 294/294 | e.g.: 77483; 77079; 77013 attrs values are text: cast when comparing numbers, e.g. (attrs->>'PCI')::numeric.