Oracle 10g adds new pseudo columns to the SQL Hierarchical Queries that use START WITH . . . CONNECT BY . . . clauses. For more than a decade, Oracle SQL has had the ability to cause a query to follow a hierarchical relationship. For instance, you could specify a starting condition and continue to child rows using one or more connection conditions. As an example, suppose I have a table that lists some regions of the world. View Listing A.
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