Database systems reduce redundancy of data, right or wrong

This statement is correct. Here's why:

Database systems.

There are four features:

1. Data structuring. Adopt a data model.

to describe and define the data.

2. High data sharing and low redundancy. Since the data is analyzed and described globally, it can be suitable for the needs of multiple users and various applications to share data. Information can be stored in a single place, sharing it while significantly reducing data redundancy.

Save storage space. However, this is not to say that there is no redundancy at all, but that the relative redundancy is reduced.

3. The data is independent of the program. Includes both logical and physical independence.

4. Unified management and control of data. Since database systems are data-intensive, unified management and control is especially important.

So, it is true that database systems reduce data redundancy.

Hope it helps. Thank you.

There is no right or wrong, only suitable and unsuitable.

Your database system is designed seamlessly, with no redundancy at all, and it looks like space is saved.

However, many tables may be associated together to query. It may take a little more time.

Yours is a database system, and in order to avoid associating too many tables when querying, a lot of data redundancy is designed.

Then the query speed is very fast, but when updating some data, I am afraid that it will be associated with updating many tables.

In general, a moderate amount of redundancy is sufficient. Don't be too redundant, and don't have to be perfect.

Mistake.

A database is "a warehouse that organizes, stores, and manages data according to a data structure." It is a collection of large amounts of data that are stored in a computer for a long time, organized, shareable, and uniformly managed.

A database is a repository of data. It has a large storage space, which can store millions, tens of millions, and hundreds of millions of pieces. However, the database does not store data at random, and there are certain rules, otherwise the query efficiency will be very low.

Today's world is an internet world full of data, and it is full of data. In the envy, this Internet world is the world of data. There are many types of data, such as travel records, consumption records, web pages browsed, messages sent, and so on.

In addition to text-type data, images, **, and sounds are all data.

In the history of database development, the database has experienced various stages of development, such as hierarchical database, mesh data database and relational database, and the database technology has developed rapidly in all aspects. Since the 80s, almost all new database products from database vendors have supported relational databases, and even some non-relational database products have almost all interfaces that support relational databases.

Poor answers]:a

The characteristics of the database system refer to Qingmin's data sharing, data independence, reducing data redundancy, avoiding data inconsistencies and strengthening data protection.

Disadvantages of data redundancy:

1. Waste of storage space.

2. The execution efficiency of data interaction and database access is reduced.

However, proper data redundancy can speed up queries. Whether data redundancy is good or bad depends on the project you do.

Data redundancy occurs when the same block of data is stored in two or more separate locations. Suppose you create a database to store sales records and enter customer addresses in the records for each sale. However, there are multiple sales to the same customer, so the same address is entered multiple times.

Repeatedly entered addresses are redundant data.

In the narrative of redundant data, it is incorrect to defeat ().

a.The existence of redundancy can easily compromise the integrity of the database.

b.The existence of redundancy makes it difficult to maintain the database.

c.No redundant data should be stored in the database.

d.Redundant data refers to data that can be exported from the base data.

Correct Answer: Bulaling should store any redundant data in the database.

Data redundancy exists in (limb guessing).

a.file mega system.

b.database system.

c.file system vs. database system.

d.None of the above is true.

Positive calendar pins the answer: c