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2022-08-15 19:31:54  阅读:49  来源: 互联网

标签:set cable database connectors connections connection connect

connect [Origin: connectere, from com- + nectere 'to tie']

A necktie or tie is a narrow piece of cloth that someone, usually a man, puts under his shirt collar and ties so that the ends hang down in front.

An electrical connector is an electromechanical device used to join electrical conductors and create an electrical circuit. The connection may be removable (as for portable equipment), require a tool for assembly and removal, or serve as a permanent electrical joint between two points. An adapter can be used to join dissimilar connectors. Plugs and sockets are connectors.

Thousands of configurations of connectors are manufactured for power, data, and audiovisual applications. Electrical connectors can be divided into four basic categories, differentiated by their function:

  • inline or cable connectors permanently attached to a cable, so it can be plugged into another terminal (either a stationary instrument or another cable)
  • Chassis /ˈʃæsi:/ or panel connectors permanently attached to a piece of equipment so users can connect a cable to a stationary device
  • PCB mount connectors soldered to a printed circuit board, providing a point for cable or wire attachment. (e.g. pin headers, screw terminals, board-to-board connectors)
  • Splice or butt connectors (primarily insulation displacement connectors) that permanently join two lengths of wire or cable

A database connection is a facility in computer science that allows client software to talk to database server software, whether on the same machine or not. A connection is required to send commands and receive answers, usually in the form of a result set.

Connections are built by supplying an underlying driver or provider with a connection string, which is a way of addressing a specific database or server and instance as well as user authentication credentials (for example, Server=sql_box;Database=Common;User ID=uid;Pwd=password;). Once a connection has been built it can be opened and closed at will, and properties (such as the command time-out length, or transaction, if one exists) can be set. The Connection String is composed of a set of key/value pairs as dictated by the data access interface and data provider being used.

Database connections are finite and expensive and can take a disproportionately long time to create relative to the operations performed on them. It is very inefficient for an application to create, use, and close a database connection whenever it needs to update a database.

Connection pooling is a technique designed to alleviate this problem. A pool of database connections can be created and then shared among the applications that need to access the database.

Your connections are the people who you know or are related to, especially when they are in a position to help you.

  • She used her connections to full advantage.
  • We have good connections in the advertising industry.
  • We have connections in high places.
  • I heard about it through one of my business connections.

Six degrees of separation is the idea that all people on average are six, or fewer, social connections away from each other. Also known as the 6 Handshakes rule. As a result, a chain of "a friend of a friend" statements can be made to connect any two people in a maximum of six steps. It was originally set out by Frigyes Karinthy in 1929 and popularized in an eponymous 1990 play written by John Guare. It is sometimes generalized to the average social distance being logarithmic in the size of the population.

六级/考研单词: collar, equip, assemble, perpetual, plug, socket, configuration, manufacture, data, differentiate, terminal, mount, pin, screw, butt, insulate, displace, compute, hardware, underlie, credentials, password, compose, dictate, finite, expense, update, alleviate, advertise

来源: https://www.cnblogs.com/funwithwords/p/16589389.html

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