Karl Reitschuster's Tech Space - ORACLE RDBMS
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After a successful migration from Oracle 10gR2 to Oracle 11gR2, I observed a very odd behavior exe...
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Karl Reitschuster's Tech Space - ORACLE RDBMS - Converting Timestamp to Date ...
Hi reader, i needed to convert the date fraction from a timestamp type variable; Usually the way...
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Karl Reitschuster's Tech Space - ORACLE RDBMS
ORACLE RDBMS /Karl Updated on Wednesday, May 5, 2010 at 11:54AM by Optimizer Hints like Index, Cardinality, Ordered ... are local settings to a SQL statement. Local means th...
Orcasoracle.squarespace.com news digest
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6 years
The Oracle Active Session History (ASH) - a real treasure trove
When Oracle introduced the Active Session History (ASH) a new gate of tuning and monitoring options was opened. Yes we had statspack, extended tracing and so on but all these tools were mssing a time(line) dimension. For example statspack reports and...
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6 years
Yet another workaround for missing AVG() function for the Oracle interval type
Isn't it similar to you experience with Oracle SQL? there are a few places in the Oracle SQL implementation where you think why didn't they think it through to the end or did they only partially implement a feature?
So you are not the only one suffering from this. It does not mean Oracle SQL is inconsistent as it is indeed a mighty mature tool to handle date and structures in the Oracle database.... -
9 years
dramatic differences of in memory scanning performance on range queries
Given following two identical tables, on which run the same SQL, replicated in memory with oracle in-memory option - one table created out of the other.
each tables covers 24m rows.
Same structure ... -
10 years
Why the In-Memory Column Store is not used (II)
Now after some research - I detected one simple rule for provoking In-Memory scans :
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