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What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
What is property - properties of a database ? It is an integrated collection of logically related records. It consolidates separate files into a common pool of data records and
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
A relation instance indicates as r is a collection of tuples for a given relational schema at a exact point of time. A relation state r of the relation schema R (A 1 ,A 2 ,.....
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
Explain Record Based Logical Models? Record-Based logical Models: Also define data at the conceptual and view levels. Unlike object-oriented models, are used to state overall
What is Data Storage? The storage structures and access methods used by database system are specified by a set of explanation in a special type of DDL called data storage-defin
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the
Differentiate between Primary and secondary storage? Primary and secondary storage - Primary storage device stores the data temporarily. Primary storage is commonly used thro
This project will involve designing and creating a database for an organization. In the design of a database, there is no single "perfect" design. So your database design may not
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