how to create a primary key with out creating an index?
Answers were Sorted based on User's Feedback
Answer / bhargavi
Primary key creates an Index implicitly.....so Its not
possible to create a Pk without am index....
Is This Answer Correct ? | 16 Yes | 0 No |
Answer / vinoth
ALTER TABLE EMP ADD CONSTRAINT EMP_PK PRIMARY KEY(EMPNO)
DISABLE;
Primary key constraint is created and no index is created
since the constraint is disabled initially.
Is This Answer Correct ? | 11 Yes | 0 No |
Answer / santanu
hi,
we can create pry key also by creating a sequence with NO
CYCLE option.
san
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / akshay
yes it possible using trigger
Create sequence S_Number
start with 1
increment by 1;
create trigger Pri_key before insert on table(C1)
for each row
Variable number(5);
begin
select sequence.nextvalue into Variable;
insert into table c1 value(variable);
end
Is This Answer Correct ? | 3 Yes | 2 No |
Answer / anubha
The above trigger will give error of mutating table as in
this trigger you are doing dml operation on the triggering
table.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / priyankur
Unique constraint will always create non-clustered index on
column. so creation of Unique constraint is not the
solution. Yes, only sequence can create unique column but
that is not necessarily Primary key unless you treat it
likewise.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / benniyel gnanaraj
when u create a primary in the table the index is
implicitly create.index is not neccessary
Is This Answer Correct ? | 0 Yes | 1 No |
trans_id trans_date trans_amt debit_credit_indicator 001 01-JAN-13 1099 cr 001 12-JAN-13 500 db 002 24-FEB-13 400 db 002 23-MAR-13 345 cr 001 18-APR-13 800 cr 002 15-MAR-13 600 db 001 12-FEB-13 200 cr i want like this output trans_id trans_date trans_amt debit_credit_indicator 001 JAN 1599 cr no.of trans 2 i want trans_id and trans_date like 'JAN' or 'FEB' etc, trans_amt i want all credit amount - debit amount per each trans_id. and debit_credit_indicator and no.of transactions in a month.
What is mutating error in pl sql?
how to fetch common records from two tables? : Sql dba
How many times can we commit in a loop?
function can return multiple value?how give give sample coding
2 Answers 3i Infotech, CTS, Excelity Global, UHG,
What are the steps for performance tuning.
What is sql server and ase?
How to process query result in pl/sql?
Give an example of any procedure.
5 Answers Accenture, iFlex, Wipro,
What is database migration?
How to run sql statements through the web interface?
Is it possible to remove child records without removing master table records...the two having pk,fk relationship?