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A constraint named less_than_20 was defined on the field date_of_birth of table student. Delete this constraint.
ALTER TABLE student DROP CONSTRAINT less_than_20;
Explain the difference between the three storage types - volatile, non volatile and stable. Ans: Volatile storage: if storage media loses data while power goes off,
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
why are older data models are being replaced by new data models
sy bcs project of hospital managment system
Adding Redundant Associations for Efficient Access Redundant associations do not add any type of information, therefore during design we should actually examine structure of o
I need help with some assignments
Three Level Architecture of DBMS or Logical DBMS Architecture The logical architecture defines how data in the database is perceived by users. It is not deals with how the da
Natural Join : It is the similar like Equi join except one of the duplicate columns is removed in the result table. The natural join is the most usually used form of join operation
While sorting field groups we cannot use more than one key field False.
what is attribute is attribute inheritance in dbms?
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