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.
Averages for San Francisco in April. April in San Francisco, USA is gradually getting warmer as spring begins moving into summer. The average temperature during this month is slowly beginning to rise to around 110C and the average high and low temperatures also rise from a day time high of 170C to an overnight low of 100C.