Is it possible to access the current value in a session before accessing next value?

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explain primary keys and auto increment fields in mysql : sql dba

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What is the difference between Union and Union all. Which is faster.

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What is the unique index?

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1.when will you use week refcursor and when will you use strong ref cursor ? 2.what is the use of sql trace..how do you use it ? 3.can you please send all the sql plus commands...like set line 6000....

1 Answers   Satyam,

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Table A Table B 1 1 2 1 3 1. Union & union all --> A Union B , A Union all B 2. Minus , Intersect --> A minus B , B Minus A , A Intersect B 3. Joins A join B , A Left Join B A Right Join B , A full Join B 4. %Type - Uses & Benifit 5. Truncate & Delete 6. Pragma Autonomus Transaction 7. how to Perform DDL from function or procedure 8. Can we have DML inside Function 9. Rank & Dense Rank diffrence 10. Water Mark in Oracle 11. Index , Can we have index in all column of table if no then why ?

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What is meaning of <> in sql?

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How to select unique records from a table?

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what is the difference between myisam static and myisam dynamic? : Sql dba

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What is meant by truncate in sql?

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How does postgresql compare to "nosql"?

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How to use transactions efficiently : transact sql

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