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Address structuresockaddr_inThese include:IP address , port number , protocol familyRecommended Use sockaddr_in , not recommendedsockaddrsockaddr_inis equivalent, but sockaddr_in the field is clearer sockaddr /**/struct sockaddr_in { __uint8

SQL entry conditional expressions The where clause and having clause are mainly used to filter qualified tuples, followed by conditional expressions. 0. and, or condition connection Similar to common programming languages, it is mainly used for

For the IPV4 protocol, IP is a 32-bit integer, and for IPv6, IP is a 128-bit integer. In memory, IP is stored in binary form, but not easy to observe, soOKconversion translates it into a dotted-decimal representation. In Linux, there are functions

FeedLearned a lot of computer network, still do not network programming.This will not be the case after reading this post.Environment: Ubuntu14.04 64bitWhat is a socketThe concept of data communication used in network application programming based

Byte conversion function: The existence of the byte conversion function is mainly because there are two different byte orders: large and small. To ensure normal communication, some data needs to be converted. ＃include uint16_t htons(uint16_t host1

first, Structured Query language ( SQL )1 , Data manipulation language ( DML )INSERTUPDATEDELETE2 , data definition languageCREATEAlterDROPRENAMETRUNCATE3 , transaction control ( TC )COMMITROLLBACKSavePoint4 , Data Control Language ( DCL

FeedHave learned many times computer network, still do not network programming.This will not be the case after reading this post.Environment: Ubuntu14.04 64bitWhat is a socketIs the concept of data communication used in network application

The difference between rowID and rownum in 1.oracleIn an Oracle database, each row has an identifier for a unique row, ROWID, where the physical location of the row is stored inside the database. The ROWID is a 18-digit number with base-64 encoding.