What is the usage of merge statement?
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What does ROLLBACK do ?
How to calculate date and time differences in oracle?
Explain what are synonyms used for?
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.
What is a subquery?
what is IDE,DMV in sql server?
What is a Tablespace?
What are the different pseudo commands? Explain in general?
How to create an oracle testing table?
What is an Oracle sequence?
How can Oracle users be audited?
What are the major difference between truncate and delete?