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Editorial Team
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Asked: 2026-05-15T16:18:29+00:00

How does oracle treats dml statements executed by multiple users on the same data

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How does oracle treats dml statements executed by multiple users on the same data object?. Suppose,

If there is a empty table named EMP(empname varchar2(30)) and user ‘A‘ makes an entry into it

using,

insert into emp values('A');

but hasn’t committed it yet.

If another user ‘B‘ logged into the same database commits, would he/she sees the dml operations performed by ‘A‘(i.e, ‘A‘ in the EMP table)?

Other scenarios/links related to this topic would be much appreciated.
Thanks in advance.

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1 Answer

  1. Editorial Team

    Transactions are not seen outside of your session until you commit. If another user logs in, then they will see the table as it was stored in the database at its last committed state. That is the reason for undo space, redo logs, etc. In your scenario, User B would not see A’s transaction even though B has committed his, because A has not committed their changes.

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