I’ve written earlier about how to calculate a query’s scalar subquery cache size, and I’ve had an interesting thought since the last blog entry. The last entry was all about scalar subqueries that appear in a query’s select clause, but… Read More
Calculating Scalar Subquery Cache Size
Whenever you have a scalar subquery in Oracle, there are a few different options that Oracle can use for executing the subquery. Oracle can either run the query once for each row returned by the records in the from clause.… Read More