What is group by in sql?

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What is the advantage of index in sql?

0 Answers  

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1. how to use the check option constraints in sql query..? 2.how to add data in a complex query ? 3.is it possible to use commit or rollback or savepoint in triggers...if not why please explain with examples...? 4.what is the difference between meterialized view and normal view..how to create materialized view and how to use it..? 5.what is varray...? what is the advantage of the varray ? please expalin with a simpel example..i want to load into a table (student no and name and his marks..) please give example.. 6.what are the bulk bind exceptions...how to use bulk bind and how to use bulk collect..please explain with example... 7.what is for update of and where current of ...? 8 what is the use of nowait ? 9.please give an example for nocopy in a simple plsql query 10.create an index in a table...tellme how to use the index in a where clause to do performance tunning...

3 Answers   Satyam,

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counting the no.of characters occurs in a string by using pl/sql function

1 Answers   TCS,

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why should required for Indexed by table in pl/sql

3 Answers  

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What program will open a mdb file?

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what is self join and how it works??

2 Answers   Infosys,

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what is cursor and its type, what is ref cursor write a syntax to pass ref cursor into procedure out fucntion and call the procedure

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What is difference between mysql and postgresql?

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Can we call dml statement in function?

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Can we use out parameter in function?

4 Answers   Infosys,

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Explain the uses of database trigger.

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