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COUNT STOPKEY operation (the where ROWNUM <= N predicate) doesn't process over ~4 Billion rows and returns wrong results | Ta...
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PL/SQL ROWNUM
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| | ROWNUM is a pseudocolumn (not a real column) that is available in a query. ROWNUM will be assigned the numbers 1, 2, 3,
| | blog.tanelpoder.com
Advanced Oracle SQL Tuning, Troubleshooting & Linux Performance Training by Tanel Poder | Tanel Poder Consulting
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| | Advanced Oracle SQL Tuning, Troubleshooting and Linux Performance Training by Tanel Poder - Linux, Oracle, SQL performance tuning and troubleshooting - consulting & training.
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Ignoring Hints - 2 | Oracle Scratchpad
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| | Here's a little puzzle that someone sent to me a couple of days ago - it's a case where the optimizer seems to be ignoring a hint. Notice that the only difference between these two queries is the filter predicate: t1.id = 1 in the first statement and t2.id = 1 in the second. Given...
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XT&R blackboard: ?????? ? ???????? ????? ?????? ? Oracle 11.1 - 11.2.0.3(??????? ???????????????????)
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| ?????? ????? ???? ????? ?? 11.2.0.3 ? ?????? ??????(V$SQL_HINT), ????? ?????? ?? ???????? ? ???? ??????? ???????, ??????? ??????????? ??????...