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KILLING SESSIONS IN ORACLE
Author JP Vijaykumar
Date Jan 27th 2009
Modified Jan 29th 2009
One of my procedure is taking long time to complete.
I have worked in a table with one timestamp field namely Actiondate. We have updated the sysdate value of inserting time to that field. It contains around 30 lakhs records.
I want to get the records which are inserted a particular day.
I run the following 2 queries..
select * from history
where trunc(actiondate) > trunc(sysdate)
order by docintno
select * from history
where trunc(actiondate) > '01-dec-2009'
order by docintno
Both are taking too much time to give the results.
Both SQL Trace and TKPROF help to find the statistics of an SQL statement which could be used for query optimization.
Start Oracle SQLTRACE:
In Oracle, to start an SQLTRACE for the current session, execute:
ALTER SESSION SET SQL_TRACE = TRUE;
Stop Oracle SQLTRACE
In Oracle, to stop SQL tracing for the current session, execute:
ALTER SESSION SET sql_trace = false;
Trasliteration - Conversion of double/triple byte characters to single byte characters for various requirementsSubmitted by ayush_anand on Mon, 2009-12-07 06:49
I recently came across a document where the requirement was to convert from triple/double byte characters to single byte characters to send it for export complaince check as the export compliance system can accept only single byte characters.
Basically the useful thing about this was they were using IBM ICU project(an open source project) for this process,so in a way making it more open to developers.
These were the pros and cons for IBM identified by them.
- No interface needed (written in Java, integrable in Oracle)
- High level of portability, flexibility and scalability
- No int
The Adventure Begins
This article is a shortened version of the full article on Installing Oracle E-Business 12.1.1 on Oracle Enterprise Linux 5.4 64-bit which can be read on Oracle-Developer.com.
I started by purchasing a brand new enterprise server without an OS. My first goal was to install the latest release of Oracle Enterprise Linux for the operating system and then to install the latest release of Oracle Database (11.2).
SQL for SAS Programmers - Introduction
What is SQL?
SQL stands for Structured Query Language and was designed for development and maintenance within a Database Management System (DBMS).
In my view, Display Manager commands didn’t get much attention of SAS programmers as they should be. It may be because...
1) SAS Documentation has very little information about how to use this facility.
2) Even Google searches aren’t helpful enough.
Here are the list of Display Manager Commands I know…
Using Manager commands we can open the dataset from any directory without touching the Explorer window…
Many a time, developers ask for procedures to kill there own sessions in the oracle db.
Many of our developers are scattered around the globe in different time zones.
During on-call rotation, developers will be calling me, round the clock, to kill their sessions.
To resolve this issue, I came up with this package, consisting of a pipelined function
and a procedure. The pipelined function, displays the users' sessions in the db.
The procedure kills the developer's session only.
Here I present a simple query to use when we want to move the tables and indexes of several users at once.
To make it one by one:
ALTER TABLE xxxxxx MOVE TABLESPACE TEST; ALTER INDEX xxxxxx REBUILD TABLESPACE TEST;
To move data from multiple owners.