LNNVL is a SQL function that takes a condition as an argument. It returns TRUE if the condition is FALSE or NULL. It returns FALSE if the condition is TRUE. It is available but not documented in Oracle database versions prior to 10gR1.

In his comment to my previous post about this function, Laurent demonstrated how […]

Before going into the worst bugs, do you know why computer program errors are called “bugs” and why developers like myself “debug” programs? It all goes back to September, 1945. Here is the story: