What is the purpose of primary key?
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Why do we create views in sql?
write a query to remove null following table are id name 101 dinesh null jyothi null bharathi 102 suresh null shilpha 103 prakesh null suma i want the output format like id name 101 dinesh 102 suresh 103 prakesh
How is pl sql different from sql?
What is the difference between left join and right join?
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 a database? : Sql dba
What is trigger and how to use it in sql?
What is a boolean in sql?
What is the use of sqlerrd 3?
How to update salary of employees department wise?
What does := mean in pl sql?
What is the difference between rollback and rollback to statements?
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