Both QUALIFY and reusing an alias is Teradata specific. Your try with HAVING is failing, because this is the logical sequence of processing a query: To resolve this you have to use a Derived Table/Inline View and move the QUALIFY condition into the outer WHERE. The same technique must be used when you want to reuse an alias. EDIT: The 2nd query can be rewritten as:
Whether youâre trying to figure out what to pack for San Francisco in July or March, your packing list will stay more or less the same. Be sure to always bring a warm jacket, cooler layers, activewear, a day pack, sunscreen, and comfortable shoes.
Usually every day during March the temperature rises to over 50 Â°F (10 Â°C) in San Francisco. The city averages 4 days this month when the thermometer reaches into the 70s Â°F (over 21 Â°C). Temperatures above 80 Â°F (27 Â°C) are uncommon during March.