Explain the use of Merge statement in oracle 11g
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Provide an example of a shell script which logs into SQLPLUS as SYS, determines the current date, changes the date format to include minutes & seconds, issues a drop table command, displays the date again, and finally exits.
I have a table that log salary-increase-process have fields: autoid, old_salary, acctno and table EMP: acctno, name, salary I want to list count increase-salary of employees, each have old_salary, new_salary. Help me with SELECT statement, please!
If a table column has is UNIQUE and has NOT NULL, is it equivalent to a PRIMARY KEY column?
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Describe the types of sub query?
Can a View based on another View ?
difference between truncate and delete ,drop?
21. Using a set operator, display the client number of all clients who have ever placed an order and whose whose name does not contain the string Sm.
9)When information has to be stored w.r.t employees and their respective departments, which of the following is the Correct formulation of entries? A)Employee and department would together be represented as an entity. B)This is too less information to decide on entities. C)An employee would be one entity and a department would be another. D)Such a scenario cannot be modelled in RDBMS
Select the Nth lowest value from a table?
can any one help me with import/export options in oracle............
what is the use of composite key constraint?