What is rtm stands for?
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Can a composite key be null?
How do you write an index?
How to raise user-defined exception with custom sqlerrm ?
What is a subquery in sql?
What are the types of subqueries?
what is a database? : Sql dba
how to check myisam tables for errors? : Sql dba
Explain the purpose of %type and %rowtype data types with the example?
What are the different datatypes available in PL/SQL?
Which is faster count (*) or count 1?
What is a heap in sql?
Why do we use joins?
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