Interested to Buy Any Domain ? << Click Here >> for more details...
how do you restrict number of rows for a particular value
in a column.For example:there is a table called
fruits,having apples,bananas ,papayas.I dont want to have
more than 100 apples in that table ,so how can u restrict
number of rows for apple to hundred?
- 6 Answers
- 11136 Views
- I also Faced
- E-Mail Answers
Answer Posted / ashwin
You can create a sequence named seq_fruit as below .
create sequence seq_fruit
increment by 1
start with 1
maxvalue 100
minvalue 1
cycle
cache 10
if the current count ie currval of seq_fruit is 100 and
after this if u r inserting a new row in fruit table as
following
insert into fruit values(seq_fruit.nextval,30,40);
after the execution of this statement next value for apple
will be entered as 1 and not 101.
The cycle keyword will avoid the count of fruit column to go
beyond 100.
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
Explain the commit statement.
What does the argument [or replace] do?
what is the difference between a local and a global temporary table? : Sql dba
What are all the different normalization?
Why we use stored procedure instead of query?
Explain what is an index?
What is a Mapplet?
Mention what does the hierarchical profiler does?
How can we optimize a sql query?
How do I tune a sql query?
What is rowtype?
differentiate between float and double. : Sql dba
What is dense_rank in sql?
How can I get the number of records affected by a stored procedure?
What is a relationship and what are they?
