How does rowid help in running a query faster?

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Is sql a case sensitive language?

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define data blocks ? : Sql dba

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what is a trigger? : Sql dba

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Does indexing improve query performance?

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What are the topics in pl sql?

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Is left join inner or outer by default?

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How do I create a sql script?

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Is subquery faster than join?

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what is definer rights invoke rights?

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hi this is nakka i have been looking for 1+ exp in oracle sql,plsql developer positions also have knoledge on d2k i am not getting proper walkins how to know it? where can i find it?

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What is the difference between UNIQUE CONSTRAINT and PRIMARY KEY? 1. There is no difference. 2. A PRIMARY KEY cannot be declared on multiple columns. 3. A UNIQUE CONSTRAINT cannot be declared on multiple columns. 4. A table can have multiple PRIMARY KEYS but only one UNIQUE CONSTRAINT. 5. A table can have multiple UNIQUE CONSTRAINTs but only one PRIMARY KEY.

7 Answers   Satyam,

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