Define union, minus, union all, intersect ?
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What is exception? What are the types of exceptions?
what is the difference between delete and truncate statement in sql? : Sql dba
What normalization means?
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 meant by urlencode and urldocode? : Sql dba
What operators deal with null?
List the differences between plsql - function & procedures
What is data definition language?
Can a table have two primary keys?
Explain the usage of WHERE CURRENT OF clause in cursors ?
what is the difference between trigger and constraint?
Can we use loop in sql?
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