What are conditional predicates?
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What does closing a cursor do?
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;
Explain two easy sql optimizations.
What is the use of stored procedures?
What is the difference between nvl function, ifnull function, and isnull function?
What is the difference between truncate and drop statements?
How can analyze query after generating explain plan ?
What is a self join ?
How many unique keys can a table have?
when a procedure /package is getting invalidated?
what is a sub query?how will you calculate working days in a month using sub query?
How can I get the number of records affected by a stored procedure?
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