Answer Posted / hari

no. a table can have only one primary key.some times table
can use composite primary key

ex create table std
(stdid bigint(10) not null,
e mailid varchar(20) not null);
primary key(stdid,e mailid)

Can I join the same table twice?

1095

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What does select top 1 do in sql?

1142

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What is trigger with example?

1170

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Why we use sql profiler?

1023

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Why do we use sqlite?

1029

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Is and as keyword in pl sql?

1012

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How do you remove duplicates without using distinct in sql?

1019

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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?

1893

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What is oracle and pl sql?

1159

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What does the hierarchical profiler does?

1126

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How can get second highest salary in sql?

1025

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What are procedures used for?

1036

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Can a composite key be null?

1034

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What is the use of pl/sql table?

1105

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What do we need to check in database testing?

1063

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