SELECT SUM over a lone NULL throws Msg 8117: Operand data type void type is invalid for sum operator. Here is why it happens and how ISNULL fixes it.
SQL SERVER – T-SQL Scripts to Find Maximum between Two Numbers
A SQL enthusiast at the airport asked for a simple way to find maximum between two numbers. Here is his clever ABS formula and my CASE version.
Tabular Models for the SQL Developer
Tabular models for the SQL developer add relationships, measures, security, and reusable semantics above SQL tables; learn when a view is enough.
Summary Tables: Keeping Pre-Aggregated Totals Current
Keep summary tables current with changed-day rebuilds, handle late arrivals and deletes, and reconcile stored totals against detail.
SQLAuthority News – Ahmedabad Tech Ed On Road June 11, 2011 – A Grand Success of Community Tech Days
Over 500 people packed the Ahmedabad Tech Ed On Road on June 11, 2011, so we found 150 more chairs. Here is how this Community Tech Days went.
SQL SERVER – SSAS – Multidimensional Space Terms and Explanation
At a Tech Ed On Road session I was asked to explain multidimensional space in simple words. Here are dimension, member, value, attribute and size.
Data Integration Patterns Without Special Tools
Data integration patterns in SQL Server cover full reloads, incremental pulls, change capture, and file drops with clear restart rules.