How do I run a script in sql developer?

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how will you find out the last three records in a table with n no of records and delete them

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What is difference between primary and secondary key?

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How do I view a sql trace file?

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What is a column in a table?

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Is id a reserved word in sql?

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What happens when a trigger is associated to a view?

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Does a primary key have to be a number?

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4. Select sum(A.salary) +sum(B.salary) as TOT_SAL from ( select LEVEL emp_id,level*100 salary,case when mod (level,2)=0then 2 else null end dept_id from dual connect by level<6 )A right outer join (select level emp_id ,level*200 salary ,case when mod (level,3)=0 then 2 else null end dept_id from dual connect by level<6)B On A.dept_id=B.dept_id And A.emp_id=B.emp-id;

1 Answers   Fintellix,

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What is attribute indicator in pl sql?

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We have a CURSOR then we need BULK COLLECT?

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Can we alter stored procedure?

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