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Explain the functions of data manager?
Functions of Data Manager :- Convert operations in user's queries coming directly through query processor or indirectly in an application program from users logical view to a physical file system.- It interfaces along with file system enforces constraints to maintain consistency. And integrity of the data as well as its security. (Authorization and Integrity Manager).- Synchronizing simultaneous operations performed through concurrent users. (Transaction Manager) - Back up and recovery operations (Transaction Manager)
Example: //REVOKE ALL ON EMP FROM MCA12; (All permissions will be cancelled) You can also cancel only some of the permissions. Drop: A user-
projects?
What is the archtetype/instance pattern? The archetype/instance pattern happens when one entity tracks occurrences of another entity. A common example is the relationship among
In the first unit of this block, you have been given with the details of the Database Management System, its structure, advantages etc. This unit is an attempt to give you informat
i want help to complete my task
#ques Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a p
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
What is meant by data-transfer rate? The data-transfer rate is the rate at which data can be retrieved from or kept to the disk.
case study
Creation of Indexes Automatically: When a primary key or Unique constraint is show in a table definition then a unique index is formed automatically. Manually: User can
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