What are the three pl sql block types?
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What are tables and fields?
What is database sql?
How collections are improve the performance?
What is bulk collections?
Is sqlite thread safe?
differentiate between float and double. : Sql dba
What is the difference between delete, truncate and drop command?
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 sql profiler?
What are the two virtual tables available at the time of database trigger execution?
what is switch column,colums cost in oracle?
What is sql keyword?
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