Explain what is a column in a table?
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What is Primary Key?
What is replication id?
how to retrieve last tree records from table? select *from emp where rownum > (select count(*)-3 from emp); i am using this query to get last three records from table but its not giving any output, so please tell me what is the error in this query.
What is normalization in a database?
Explain commit, rollback and savepoint.
How many databases can sql express handle?
If a cursor is open, how can we find in a pl/sql block?
What is the use of primary key?
How do you modify a column in sql?
What mean sql?
Does inner join return duplicate rows?
How many levels can subqueries be nested in a FROM clause?