Most developers use some form of auto-incrementing integer counter for a given database table…
Top n Window Function queries over a specific subset of data are common in analysis and…
The Window Ranking functions: ROW_NUMBER(), RANK(), and DENSE_RANK() each rank rows with an…
ROW_NUMBER()
RANK()
DENSE_RANK()
PHP provides a handy function, empty(), that is used to determine whether a variable is…
empty()