What are schema-level triggers?

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what is rollback? : Sql dba

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How do you identify a primary key?

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What are sql triggers used for?

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wirte a query to remove null? following table are col1 col2 col3 dinesh null null null suresh null null null prakesh i want the output like col1 col2 col3 dinesh suresh prkaesh

6 Answers   TCS,

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What is an Exception ? What are types of Exception ?

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1.when will you use week refcursor and when will you use strong ref cursor ? 2.what is the use of sql trace..how do you use it ? 3.can you please send all the sql plus commands...like set line 6000....

1 Answers   Satyam,

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can i create trigger on synonym is it possible or not please help me

4 Answers   CGI,

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how many no of table can be join in a sql query.

4 Answers  

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- Types of triggers - View - Dcl - Procedures, packages, functions - Metasolve - Can use Dcl in triggers - package case study - Cursor and its types - triggers schedule - Wrap - Why we are using fetch and for in cursor. difference?

0 Answers   CTS,

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When we can declare a column as Unique and Not Null both at the same time. What is the use pf Primary Key then?

2 Answers   Accenture, Unisoft Infotech,

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Explain select statements in sql?

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