ORATraining Blog

Tweet Oracle SQL Tuning Tips consideration when writing an SQL statement is that it returns a correct result. The second is that it be the most efficient for a given situation.  You can use many different SQL statements to achieve the same result. It is often the case that only one statement will be the [...]

Tweet Oracle Data Export and Import utility The Import and Export utilities work together; Export sends database definitions and actual data to an export file and Import can read the file to perform many different tasks. You can use Export and Import for many important database tasks, such as restoring a table, generating CREATE scripts, [...]

Tweet /*+ hint */ /*+ hint(argument) */ /*+ hint(argument-1 argument-2) */ All hints except /*+ rule */ cause the CBO to be used. Therefore, it is good practise to analyze the underlying tables if hints are used (or the query is fully hinted. There should be no schema names in hints. Hints must use aliases [...]