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 www.bobbydurrettdba.com
Cardinality errors across joins | Bobby Durrett's DBA Blog
| | www.dbaglobe.com
Donghua's Blog - DBAGlobe: Subquery Performance Tuning (Part 2, NOT IN and NOT EXISTS))
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| | A blog about on new technologie. Hands-on note about Hadoop, Cloudera, Hortonworks, NoSQL, Cassandra, Neo4j, MongoDB, Oracle, SQL Server, Linux, etc.
| | sqlmaria.com
How to determine which view is the right view to use in Oracle?
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| | Database views are a handy tool to help obfuscate complex joins from developers and analysts. However, knowing which view to use can be tricky, especially when faced with multiple views with simila...
| | blog.sqlora.com
Fix Optimizer Estimate Issues from Implicit Conversions #JoelKallmanDay
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| | Learn how implicit RAW-to-VARCHAR2 conversions in Oracle break histograms, hurt optimizer estimates, and how to fix them safely.
| | www.bobbydurrettdba.com
Using coe_xfr_sql_profile.sql to force a good plan | Bobby Durrett's DBA Blog
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| Sunday night we worked with Oracle Support on a performance issue with a query that had been running for over 14 hours even though it ran the previous weekend in five minutes. Oracle Support showe...