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Draw an E_R Model for the following:
An organization uses number of items of a equipment to generates goods. Each item is at one LOCATION, of one TYPE and has a DETAILED_DISCRIPTION. Faults on the equipment are identified through a unique FAULT_ID and are reported at a TIME_REPORTED. Any number of persons may be assigned to a fault and work on the fault until it is fixed. The TIME_FIXED is recorded as is the TIME_SPENT through each person on a fault. Any number of elements may be used to repair a fault. The QTY_USED of each part is recorded against the fault. Each part is identified through a PART_ID and has a given weight and MAX_DIMENSION and can have any number of colors.
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
What are the Constituents of File? Also elaborates all the possible file operations? A file is organised logically as sequence of record. These records are mapped onto disk blo
Drawbacks of Database systems ?
Improved availability: The data in a distributed system may be replicated so that it is at more than one site. Thus, the failure of a node or a communication link does not necessar
In which format database schema is written ? Data base schema is written in the DDL format.
Define page. The database is partitioned into some number of fixed-length blocks, which are referred to as pages.
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
What is the difference between the function module and a normal ABAP/4 subroutine? In contrast to normal subroutines function modules have uniquely exact interface. Declaring da
Show a centralised schema to support the operation of the system you have chosen, including in particular: the product catalogue; the outlets and respective stocks; customer record
explain thee diffrent types of data models
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