what are the advantages of primary key over unique+notnull
Answer Posted / nitesh
PRIMARY KEY CREATED WITH INDEXES WHICH IS NOT HAPPEN WITH
UNIQUE AND NOT NULL
| Is This Answer Correct ? | 8 Yes | 21 No |
Post New Answer View All Answers
What do you mean by field in sql?
Explain the difference between 'between' & 'and' operators in sql
What are the commands used in sql?
What is sql and how does it work?
What is before trigger?
What are the constraints available in sql?
What is sql and also describe types of sql statements?
What are predefined functions in sql?
What are the ways on commenting in a pl/sql code?
in oracle 10g sw after compiling procedure how to pass parameter values ,if we (v_empid out number)how to give empid after successful compilation program.This site exact suitable for 10g with respect to question & answer same format , im trying sql browser & sql command prompt using exec procedure name & respective parameters.
what are the security recommendations while using mysql? : Sql dba
What are different sql data types?
what is meant by nl2br()? : Sql dba
Can we use commit inside a trigger?
Which normal form is best?