How can we avoid duplicating records in a query?

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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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a procedure one in two out parameters i am waiting it in a sql query can i get the output

1 Answers  

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What is loop in pl sql?

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How many rows will return from dual table?

4 Answers   Fujitsu,

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What is user defined functions?

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i have a table with column sno with 30 records. i want to update this column by item by item in asp.net. i wantto enter new values into that from 1 to 30 how is it possible with backend c#

1 Answers  

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What is foreign key sql?

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what are the forced views

6 Answers   Hexaware, TCS,

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HOW TO TUNE ORACLE SQL QUERIES GIVE ME STEP BY SREP

1 Answers   TCS,

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What is compute?

0 Answers  

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How do you change a value in sql?

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