-- ISNULL() function replaces NULL with a specified value. -- The ISNULL() function returns the replacement if the expression evaluates to NULL. -- Before returning a value, it implicitly converts the ...

1)ISNULL function is regraded as Transact-SQL function. 2)This function is used to replace NULL with the replacement value specified in second argument or from from the input expression it returns ...

I've been in an argument with one of our devs that took an update statement with an inner join and made it a left join (because inner was missing some records somehow in the left table - tableB in ...