What are sql triggers used for?

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what are the performance and scalability characteristics of mysql? : Sql dba

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What is a subquery in sql?

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what are myisam tables? : Sql dba

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What are the default Oracle triggers??

3 Answers   CGI, Tech Mahindra,

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Explain 3 basic parts of a trigger.

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What are the various levels of constraints?

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What are different categories of sql commands?

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What is the use of pl/sql table?

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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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What are the two characteristics of a primary key?

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Write a query to find five highest salaries from EMP table. (there is a column SALARY)

24 Answers   Cap Gemini, iNautix,

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