Why would someone use WHERE 1=1 AND in a SQL clause?

Question

Why would someone use WHERE 1=1 AND in a SQL clause (Either SQL obtained through concatenated strings, either view definition)

I\'ve

Answer 1

While I can see that 1=1 would be useful for generated SQL, a technique I use in PHP is to create an array of clauses and then do

implode (" AND ", $clauses);

thus avoiding the problem of having a leading or trailing AND. Obviously this is only useful if you know that you are going to have at least one clause!