Why primary key is required?

0 Answers  

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Could you please provide oca (oracle 10g) dumps for my certification ?

1 Answers  

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what is 'mysqlimport'? : Sql dba

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What is a unique key and primary key and foreign key?

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List the ways to get the count of records in a table?

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What is write ahead logging in sql server?

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How to display all Friday's in a year with date?

4 Answers   Flipkart,

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what are date and time data types? : Sql dba

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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In table a 1lakh data is present,in table b 20 thousand data is present, to get unique data from table a and b which join to be considered. whether right outer join or left inner join. 

2 Answers   GE,

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function can return value ,procedure also return value through out parameter then what is the difference?

3 Answers   3i Infotech,

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How to run pl sql program in mysql?

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