SELECT Statement Processing in Oracle database | Query Processing in Oracle | SQL Query Processing

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SELECT Statement Processing in Oracle database | Query Processing in Oracle | SQL Query Processing

Hi,
I am Rabin Karmakar.
Welcome to my YouTube Channel "RK SoftAcademy".

About this video -
In this video I have discussed about how a SELECT Query or Statement get processed in Oracle Database.
You will learn about different phases of select statement processing are:
1. Parse
2. Bind
3. Exceute
4. Fetch

Please watch the complete video to know in detail about each topic.
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#selectstatementprocessinginoracledatabase #queryprocessinginoracle #sqlqueryprocessing #sqltutorial #oracletutorial #oracletrainings #oraclesql #oracleplsql #rksoftacademy

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Hi, Thanks for video

I have a question

08:32
ㄴ In phase "Execution", which data files(data blocks) does Oracle Server Process read and write?
ㄴ Is it all data of tables in query?

09:24
ㄴ In phase "Fetch", how can Oracle Server Process get the result data from the database buffer cache?

I just wonder the time the execution plan is used for getting the result data.

In phase "Execution", the Oracle Server Process read all data of tables in query and write to the database buffer cache.

Case 1 :
And then, In phase "Fetch", the Oracle Server Process get the result data by using execution plan.

==> The execution plan was defined on phase "Parse" by each query string.
I think there is many cases of result by a query string(execution plan).
So how can the Oracle Server Process get the proper result data by using execution plan?

Case 2 :
And then, In phase "Fetch", the Oracle Server Process get the result data by using execution plan "AND SOMETHING OTHER INFO OR DATA"

==> What is something other info or data?

I am sorry my question is bad. Because of my low knowledge.

Have a good day

honggit

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ravisharma-zedk

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