It is often helpful to use dollar quoting (see Section 4.1.2.4) to write the function definition string, rather than the normal single quote syntax. Without dollar quoting, any single quotes or ...
Instead, the rows retain their separate identities. Behind the scenes, the window function is able to access more than just the current row of the query result. Here is an example that shows how to ...
The probability density function (PDF) is an expression used in statistics that defines the probability that some outcome will occur. In this function, the probability is the percentage of a ...