What is the use of function "module procedure" in pl/sql?

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Write one update command to update seqno field of a table on the basis of row number.

4 Answers   HCL,

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What is query execution plan in sql?

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What is the unique index?

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What is primary key secondary key alternate key candidate key?

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What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

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what is a materialized view? : Sql dba

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what is global variable in package

3 Answers   Polaris,

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What is a trigger word?

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State some properties of relational databases?

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how to calcuate the second highest salary of he employee

13 Answers   Synechron,

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what is the difference between varray and table data type..please expalain with some examples... under what situation you will go for varray..instead of index by table...

1 Answers   HCL, Satyam,

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