WHERE clause filters rows returned by SELECT, UPDATE, or DELETE statements. Tutorial uses university database schema with student, courses, and departments tables. Techniques work across MySQL, SQL Server, and PostgreSQL
Value is the only factor to consider in trading decisions. Demand, stability, and rarity are equally important as value. Ranged Value shows the range of possible item values
Handpicking separates impurities by hand when mixture contains different colors. Threshing loosens edible parts from non-edible parts in agriculture. Winnowing separates grains from straw using air current
Click Rules button in toolbar or right-click message to create rules. Select desired folder from available options or create new one. Choose filter conditions using words, phrases, or email addresses. Set actions like moving messages to specific folders. Option to run filter immediately for existing messages
Default REST views return entire queryset by default. Queryset filtering can be done through .get_queryset() override. Filtering can be based on current user, URL, or query parameters
WHERE clause filters datasets based on specified criteria. Multiple filters can be combined using AND operator. WHERE clause must come before GROUP BY in queries