What is the purpose of a secondary key?
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Is vs as in pl sql?
check whether all the emp numbers are indeed unique.
How would you hide a table in sql. ie the table can be only visible to its maker?
Which is better join or subquery?
What is the difference between join and natural join?
Is sql injection illegal?
How do you copy a table in sql?
What is dynamic query?
How to write a single statement that concatenates the words ?hello? And ?world? And assign it in a variable named greeting?
What is the different between Stored Procedure and Procedure?
What is the difference between in and between in sql?
What is the difference between partition and index?
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