What is difference between sql and mysql?
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What is rename in sql?
Why is a trigger used?
Does truncate remove indexes?
Enlist some predefined exceptions?
Explain the significance of the & and && operators in pl sql.
What is sql exception?
IN A TABLE HAVE ONE COLUMN PRIMARY KEY..IT WILL NOT ALLOWS NULL VALUES AND DUPLICATE VALUES..INSTEAD OF PRIMARY KEY WHY CANT WE USE UNIQUE AND NOT NULL.THESE TWO ALSO DOESNT ACCEPT NULL VALUES IN NOT NULL AND UNIQUE DOESNT ACCEPT DUPLICATE VALUES? SO WHAT IS THE DIFEERENCE BETWEEN(UNIQUE,NOT NULL) AND PRIMARY KEY??????
Does oracle roll back the transaction on an error?
what are the drivers in mysql? : Sql dba
What is nvl function?
What are sql ddl commands?
Why use triggers in sql?
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