Diffrence Between Datamart and Data Warehouse

Datamart	Data Warehouse
1.Data mart is usually sponsored at the department level and developed with a specific issue or subject in mind, a data mart is a data warehouse with a focused objective.	1.Data warehouse is a “Subject-Oriented, Integrated, Time-Variant, Nonvolatile collection of data in support of decision making”.
2.A data mart is used on a business division/ department level.	2.A data warehouse is used on an enterprise level.
3.A Data Mart is a subset of data from a Data Warehouse. Data Marts are built for specific user groups.	3.A Data Warehouse is simply an integrated consolidation of data from a variety of sources that is specially designed to support strategic and tactical decision making.
4.By providing decision makers with only a subset of data from the Data Warehouse, Privacy, Performance and Clarity Objectives can be attained.	4.The main objective of Data Warehouse is to provide an integrated environment and coherent picture of the business at a point in time.

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Timing Diagram Of Minimum and Maximum Mode 8086

TIMING DIAGRAM of MINIMUM MODE 8086

The HOLD pin is checked at the end of each bus cycle.

If it is received active by the processor before T₄ of the previous cycle of during T₁ state of the current cycles, the CPU activates HLDA in the next clock cycle and for the succeeding bus cycles; the bus will be given to another requesting master.

The control of the bus is not regained by the processor until the requesting master does not drop the HLDA pin low.

When the request is dropped by the requesting master, the HLDA is dropped by the processor at the trailing edge of the next clock, as shown in Fig

The other conditions have already been discussed in the signal description section for the HOLD and HLDA signals.

TIMING DIAGRAM of MAXIMUM MODE 8086

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