Differentiate between post-database commit and post-form commit?
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 How to use an oracle sequence generator in a mapping?
What is Normalization ?
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What are the trigger associated with image items ?
Explain oracle left join with an example?
How view is different from a table?
how to get the second max val for every group in a table
Explain enable novalidate constraint.
What is a select query statement in oracle?
Explain the characteristics of oracle dba?
The join defined by the default data link is an outer join yes or no ?
Explain an index segment?
WHAT IS THE DIFFERENCE BETWEEN PRIMARY KEY(PK) CONSTRAINT AND UNIQUE KEY(UK) + NOT NULL(NN) CONSTRAINT ASSIGN TO A COLUMN ? INSTEAD OF ASSIGNING PK ,WE CAN ASSIGN UK + NN TO A COLUMN. WHAT ARE THE MARRITS AND DEMARITS BETWEEN THE ABOVE TWO?THE ABOVE TWO ARE SAME,THEY DON'T ALLOW DUPLICATE AS WELL AS NULL VALUES.