Hidden RBAR: Triangular Joins

[From SQL Server Central]

If you’ve been around the forums on SQLServerCentral.com, you’ve probably seen me use the term “RBAR”. “RBAR” is pronounced “ree-bar” and is a “Modernism” for “Row-By-Agonizing-Row”. I use the term “RBAR” for anything that isn’t set based. Some others have picked up on it because it’s easy to remember as a form of “Death By SQL”.

Many folks think that “set-based” programming means one of two things…

  1. It’s all done in a single query or…
  2. It simply doesn’t have a Cursor or a While Loop

Both of those are very bad misconceptions as to what set based programming is.

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