What is the use of index in sql?


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What is count * in sql?

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What is the use of index in sql?

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Explain autonomous transaction.

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Q1.all the depts which has more then 10 empls? Q2.all the dept which does not have any emply? Q3 all the emp which does not have any dept? Q4 get all the emply detais with the dept details it dept is exit otherwise any emp details? Q5 how to debugg the dynamic sql and packages?

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how to get a list of columns in an existing table? : Sql dba

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