Give example of a serial file Db
Give example of a sequential Db
Talk about 3 levels of a Db view
The external view
The conceptual view
The physical view
What is a Flat file Db?
What is a hierarchical Db?
The data in the picture could be what the database is used for and what it stores.
A database records strings of information on what to do when data is input and decides where to put it and stores it to the file showing information attached.
You gain information for the collected data.
If a phone company had to take the customers name, number, address, and email the database will record it so next time when the customer calls back you can just look through the database and find their personal file of information and you can record even more information against their file and adding notes of their bills and what they have bought as their service.
Sequence databases can be searched using a variety of methods. The most common usage is probably searching for sequences similar to a certain target protein or gene whose sequence is already known to the user. A flat file database describes any of various means to encode a database model (most commonly a table) as a single file. A hierarchical database is a management system that links records together so that each record has only one owner. It represents information in a one to many relationship, e.g. parent may have more than one child but each child can only have one parent. They were used widely in the first mainframes but can not be used often as they do not relate to the structures in the real world.
This seems to be very detailed indeed but not relevant to the topic we have been looking at. What do you mean by targeting protein or gene sequences?
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