What is a primary key, and how is it different from a unique key?

3 Answers  

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Does truncate release storage space?

0 Answers  

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Dear All, Question for this Week Find out possible error(s) (either at compile time or at runtime) in the following PL/SQL block. State the reason(s) and correct the errors. Declare Cursor C1 is select ename, sal, comm from emp; Begin For i in C1 Loop If i.comm between 299 and 999 then Dbms_output.put_line(i.Ename || ‘ ** Good Commission’); Elsif i.comm > 999 then Dbms_output.put_line(i.Empno || ‘ ** Very Good Commission’); close C1; Else Dbms_output.put_line(i.Ename || ‘ ** ’ ||nvl(i.comm,‘O’)); End if; End Loop; End;

7 Answers   Accenture,

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Write a query to get last 10 records from the table.

12 Answers   iNautix,

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Is sql a oracle?

0 Answers  

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What is rownum?

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What is a common use of group by in sql?

0 Answers  

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Difference between table function and pipelined function?

0 Answers  

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What is the source code of a program?

0 Answers  

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What are the query optimization techniques?

0 Answers  

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what is a record in a database ? : Sql dba

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What is native sql query?

0 Answers  

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