explain the difference between delete , truncate and drop commands? : Sql dba

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Why cross join is used?

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What is auto increment in sql?

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how to findout the 100th maximum salary

28 Answers   Amdocs,

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what is the difference between blob and text? : Sql dba

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What are triggers, and when would you use them?

3 Answers  

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Under what condition it is possible to have a page level lock and row lock at the same time for a query? : Transact sql

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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How to fetch alternate records from a table?

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Why should I use postgresql?

0 Answers  

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What are crud methods?

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What is sql query optimization?

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