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How to clean up stuck datapump jobs
https://anargodjaev.wordpress.com/2013/12/17/how-to-cleanup-orphaned-datapump-jobs-from-dba_datapump_jobs/
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SQL*Net client trace — how to put log files in the right folder
The customer was experiencing off SQL*net problems, so I did a client side trace. The tracing worked just…
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SYS.AUD$ stores ntimestamp# in UTC time, without time zone
Use the sys_extract_utc() function to convert systimestamp to UTC before comparing ntimestamp#! select * from sys.aud$…
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One of the best readings on dynamic sampling I have found so far
http://www.google.com/patents/US20040225639
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OMS 12c: corrupt calendar control in RAC top activity
After patching 11.2.0.3.12, the “top activity” view in OMS12c stpped working properly. The calendar control in…
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How to display the hints associated with a SQL patch or profile
This is how to display the exact kind of hints included in a SQL patch or SQL…
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How to drop database links in any schema
Need to drop a database link in another user’s schema? This is how. define link_name='SOME_DBLINK' define link_owner='SOME_OWNER' declare…
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Programming loops in SQL
Using the WITH CLAUSE, loops and even nested loops can be implemented using plain SQL. To illustrate…
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How to use wait event histograms to identify possible I/O subsystem problems
dba_hist_event_histogram holds a lot of information which can prove useful when analyzing the overall system performance. To…
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How to create a SQL patch with forced matching
SQL patches are used to add hints to SQL statements that you cannot modify directly. This…
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