The meaning of the letter DB represents the following: 1, database is a warehouse that organizes, stores and manage data according to the data structure. The development, especially after the 1990s, data management is no longer just storage and management data, but transforms into various data management methods needed by users. 2, an element symbol. 3, data interface.
4, decibel
represents a unit, the ratio of two types of electricity or sound power or the ratio of two voltage or current values or similar sound; Units with sound relative loudness.
5, the pseudo -operation command command in the assembly language
It is used to define the number of bytes occupied by the number of operations. Each operation defined by the pseudo -operation occupies 1 byte (8 digits).
The expansion information: DB database. It now has four large classifications: (1) Key value to storage: Represents software Redis, its advantages can be quickly queried by data The disadvantage is that the relationship between data is required. (2) column storage: Representing software HBase, its advantage is that the data can be queried quickly, and the data storage is strong. The disadvantage is that the function of the database is limited. (3) Document database storage: Represents software MongoDB, its advantage is that it is not particularly strict for data structure requirements. The disadvantage is that the querying performance is not good, and a unified query language is lacking. (4) Graphic database storage: Represents the software Infogram, its advantages can easily use the graph structure related algorithm for calculation. The disadvantage is that if you want to get the result, you must calculate the entire graph, and when you encounter the unsuitable data model, the graphic database is difficult to use.
The meaning of the letter DB represents the following:
1, database
is a warehouse that organizes, stores and manage data according to the data structure. The development, especially after the 1990s, data management is no longer just storage and management data, but transforms into various data management methods needed by users.
2, an element symbol.
3, data interface.
4, decibel
represents a unit, the ratio of two types of electricity or sound power or the ratio of two voltage or current values or similar sound; Units with sound relative loudness.
5, the pseudo -operation command command in the assembly language
It is used to define the number of bytes occupied by the number of operations. Each operation defined by the pseudo -operation occupies 1 byte (8 digits).
The expansion information:
DB database. It now has four large classifications:
(1) Key value to storage: Represents software Redis, its advantages can be quickly queried by data The disadvantage is that the relationship between data is required.
(2) column storage: Representing software HBase, its advantage is that the data can be queried quickly, and the data storage is strong. The disadvantage is that the function of the database is limited.
(3) Document database storage: Represents software MongoDB, its advantage is that it is not particularly strict for data structure requirements. The disadvantage is that the querying performance is not good, and a unified query language is lacking.
(4) Graphic database storage: Represents the software Infogram, its advantages can easily use the graph structure related algorithm for calculation. The disadvantage is that if you want to get the result, you must calculate the entire graph, and when you encounter the unsuitable data model, the graphic database is difficult to use.