t;date&quot;, &quot;TIME&quot;, &quot;FIX&quot;, 8)
f.mkfield(&quot;product_id&quot;, &quot;INT&quot;, &quot;FIX&quot;, 4)
f.mkfield(&quot;region&quot;, &quot;STR&quot;, &quot;VAR&quot;)
f.mkfield(&quot;sales_amount&quot;, &quot;FLOAT&quot;, &quot;FIX&quot;, 8)

# Add data
f.set(&quot;sale_001&quot;, 1640995200, &quot;date&quot;)
f.set(&quot;sale_001&quot;, 1001, &quot;product_id&quot;)
f.set(&quot;sale_001&quot;, &quot;North&quot;, &quot;region&quot;)
f.set(&quot;sale_001&quot;, 299.99, &quot;sales_amount&