Answer Posted / Prem Pal
ROWID is a system-generated unique identifier for each row in a table. It's physically stored with the data itself and can be used to directly access a row without using a primary key. ROWNUM is a pseudocolumn that returns the sequential number of a row within the result set of a SQL query. It starts from 1 by default, but it can be reset if ORDER BY clause is used.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what is collation? : Sql dba
If a cursor is open, how can we find in a pl/sql block?
what are all the common sql function? : Sql dba
Can we rollback truncate?
Do we need to rebuild index after truncate?
How do I remove duplicates in two columns?
Is inner join faster than left join?
Can delete statement be rollbacked?
how to use regular expression in pattern match conditions? : Sql dba
Does group by remove duplicates?
how to escape special characters in sql statements? : Sql dba
what are aggregate and scalar functions? : Sql dba
What is the best sql course?
Can we use distinct and group by together?
what is sql server agent? : Sql dba
