Delete, select the Vs
Guys,
I had a doubt while he was working on the issue of an impasse. The thing is
""
Suppose there is an old table that contains 100 records, and according to the requirement of the company, I pulled DELETE statement and at the same time, I started a SELECT query in another terminal.
"
So, now what will be the result
1 remove is always in course and may be deleted on 50 files.
2. as it is old table there no data buffer on this table to set ASIDE as retention expired.
3. Select query gets stuck? deadlock occurs only for DML statements that I believe.
Just curious about it.
Thanks in advance. !
-Vincent
Writers do not block readers. Readers do not block writers.
Your deletion will work. If you did not remove it yet, the selection will always return these results like the select statement will use the undo data to re-create the original data blocks.
Tags: Database
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