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Description of PK, NN, UQ, BIN, UN, ZF, and AI fields in mysql workbench, and workbenchuq When using mysql workbench to create a table, the fields include PK, NN, UQ, BIN, UN, ZF, and AI basic field type identifiers. They respectively mean: PK:

The result of this question is very good, and the thinking ability is examined. On the second layer, each layer has n * n grids. the first layer of line I is placed in country I, and the second layer of column J is placed in country J. Note that in

　　-pk:primary Key (column is part of a PK) primary key-Nn:not Null (column is nullable) is empty (non-empty)-Uq:unique (column is part of a unique key) unique index (foreign key)-Ai:auto Increment (the column is auto incremented if rows are inserted)

  Name Description Add Add two values and push the results to the computing stack. Add. ovf Add the two integers, run the overflow check, and push the results to the computing stack. Add.

Reflector, reflexil, De4Dot, IL command quick query table,

The socket IPC is consistent with the general network communication. There are two types of sock_stream and sock_daram, which are different from the following: 1. the network communication server uses IP/port as the service name, And the IPC uses

In the C language, the number of bytes for a double, long, unsigned, int, char type datahttp://blog.csdn.net/lyl0625/article/details/7350045============================I can't remember, put it down:is related to the machine word length and

The general format of the ping command is:ping [-dfnqrrv][-c send number][-i interval seconds][-i network interface][-l Front load][-p template style][-s packet size][-t survival value [host name or IP address] Parameter description:-D uses the

Post Pass value (invisible Pass value) Get Pass value (visible pass value)Session-Global variable groupStorage location: Service sideFunction: As long as there is content, then all the C # side of this site can access to this variable--object

Here are the two code for the server side and client of the UNIX domain socket. There is a difference between the socket and the Internet 1. Use Af_unix instead of af_inet 2. Unix domain sockets generate a file when bind, and Af_inet does not. So it