{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/PrimaryKey",
  "title": "PrimaryKey",
  "allOf": [
    {
      "$ref": "#/components/schemas/Constraint"
    }
  ],
  "type": "object",
  "description": "A primary key is the column or columns that contain values that uniquely identify each row in a table."
}