The SQL executed by a slave scan process is similar to: SELECT f(col1) FROM tab WHERE ROWID BETWEEN :b1 AND :b2; Each slave scan operates on a range of rowids and applies function f to each contained row. The closest match is one where all the parameters are at least as close as any other overloaded instance, as determined by the depth of inheritance between the subtype and supertype, and at least one parameter is closer
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Inserting multiple rows in one SQL statement
Updating indexes is often the slowest part of inserting rows into a table, and inserting several at one time only rebuilds the index once (after all the rows are added) rather than once per row. Why I used UNION ALL instead of UNION UNION ALL will offer significantly better performance than UNION, because the UNION command assumes that if there are duplicates they should be removed (mathematically speaking, the union of two sets includes only one copy of the overlapped region.) If you use UNION ALL, it keeps both copies of the overlapped region
SQL FAQ - Oracle FAQ
COMMIT - save work done SAVEPOINT - identify a point in a transaction to which you can later roll back ROLLBACK - undo the modification I made since the last COMMIT SET TRANSACTION - Change transaction options like isolation level and what rollback segment to use SET ROLE - set the current active roles DML are not auto-commit. If you include the SAMPLE clause within a multi-table or remote query, you will get a parse error or "ORA-30561: SAMPLE option not allowed in statement with multiple table references"
Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise
Oracle SQL: displaying multiple columns per row
Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. Download data into Excel spreadsheet pivot table Excel spreadsheets are a great way to pivot and analyze Oracle data, and tools like Excel-DB provide a fast API for downloading Oracle data into spreadsheets
Is there an Oracle SQL query that aggregates multiple rows into one row? - Stack Overflow
But if, for instance, you used another analytic function with a different order by, and that accompanying WINDOW SORT operation is executed last, you get the aforementioned error
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