Can we use more than one null value for unique key?
Answer Posted / kalyana chakravarthy
Fundamental principle is 2 nulls are not unique. U can
insert N number of nulls in a unique its CONCRETE
| Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
Does truncate release storage space?
Which are the different types of indexes in sql?
Does pl/sql support create command?
Is it possible to create startup or shutdown trigger for on-schema?
what are the different tables present in mysql, which type of table is generated when we are creating a table in the following syntax: create table employee (eno int(2),ename varchar(10)) ? : Sql dba
Can I copy :old and :new pseudo-records in/to an oracle stored procedure?
How to set up sql*plus output format in oracle?
what is single byte over head in oracle..?
What is set serveroutput on?
What are analytical functions in sql?
What is a rank in sql?
What is the maximum database size for sql express?
What is a null value?
What does select * from mean in sql?
When should I use nosql database?