Database Programming

1.) If the weighted scoring model is on a spreadsheet, the weights can be changed on the fly to reflect any changes that may have occurred in your project. 2.) By supplying percentages to key aspects of importance in your model, you can accurately ascertain the value after computing the averages in said weighted model.

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select * from emp;

Class diagram

An ER diagram for a purchase and inventory system typically includes entities such as Product, Supplier, Customer, Order, and Inventory. The Product entity would have attributes like ProductID, Name, and Price, while Supplier would include SupplierID, Name, and ContactInfo. Relationships would show that a Supplier can provide multiple Products, a Customer can place multiple Orders, and each Order can include multiple Products, affecting Inventory levels. The Inventory entity would track quantities of each Product available, linking back to the Product entity.

repeater

By data conversion we mean the data is first processed. The data after processing is ready to store in database. And from the database we can retrieve it for our use.

Many small businesses choose a manual payroll system over a computerized one. Four advantages to this are it is less costly to set up, there is less training involved, no danger of losing data in a computer crash, and it is more personal to the employees.

A Data Flow Diagram at level 0 starts with the management of products, which is controlled by the store keeper whose responsibility it is to respond to the demand for products. Level 0 is a simple flow diagram with only one channel. At level 1 an administrator will register, update, and search products then inform a store keeper of demand. The store keeper will respond to the demand and report back to the administrator.

Reduced content for bandwidth

Increased fault tolerance of the network

Simplification of management and troubleshooting

...an engineering control system

Yes True

A computer is made up of many technical systems. The registry is a special database that holds key information about your system, including the device drivers.

12,500 is the maximum length of a varchar field. The nVarchar field has the same limitation however you will use twice the data store space with an nVarchar as it is effectively the same as a varchar with the exception that it will store data required for international character sets. If you support a multi-language system then you will want to use a nVarchar character type for these fields.

In hierarchical database structure, data elements are linked together as an inverted tree structure. there's a root data element, below the root ,there are subordinate elements, each of which has its own subordinate elements and so on. It can have multiple levels. Data elements have parent-child relationship. A parent data element can have more than one subordinate elements, but a child can be connected with only one parent. Its limitation is it cannot provide flexibility in data access. because every data element can be accessed through a definite path from the root data element. All the relationships between data elements should map properly when tree structure is first designed.this database model is used in several database applications because data elements of several applications can be organized as a hierarchical tree structure.

The three types of anomalies likely to show up are: Insertion, Deletion, and Update anomalies.

Query

everything is digital bases, books,articles homework all that is digital database.

optical illusion

In the early file based system their all data was in written form, due to the lake of education, due to the in-femelarity with new techniques, lake of computer knowledge so all the data required would be stored in a file or files owned by the programs.

Clearly, each program was responsible for only its own data, which could be repeated in other program's data files. Different programs could be written in different languages, and would not be able to access another program's files. This would be true even for those programs written in the same language, because a program needs to know the file structure before it can access it.

(.) Period

Granularity refers to the level of detail or summarization in the units of in the data warehouse (Inmon, WH 2002). For example, one of the dimension might be a date/time dimension which could be at the year, month, quarter, period, week, day, hour, minute, second, hundredths of seconds level of granularity. High granularity means that the data is at or near the transaction level, which has more detail. Low granularity means that the data is aggregated, which has less detail.

laleo

Existing as or involving something that exists as an unproven idea, theory, or possibility