Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with content, and download exclusive resources. This article dives into the happens-before ...

I want to design a query to compute some returns for stock data and in searching the 'SQL Server Books Online' I find a very small and not so helpful at all help section on the lead and lag functions.

Helping & empowering business owners for over 15 years, helping them to understand how to protect own interests, build bridges to amplify joint ventures, adapting new business practices and solutions.

//Need to get the mid point of array. Use Floor because we always want to round down. $mid = floor($count/2); //If there are an even amount of elements... if (($count ...