access 2010 data types

types Enumeration (enum) type, you can define up to 65535 different strings to choose from, and you can only and must select one of them, which occupies a storage space of one or two bytes, determined by the number of enumerated values; the collection (set) type, which can have up to 64 members, You can select 0 of them to an unqualified number, and occupy a storage space of one to eight bytes, determined by the number of possible members of the col

several common types of data: Type identifier Description Bytes Range of values Int Integral type 4 –2,147,483,648 to 2,147,483,647 VC + + is a long int class Short Short-integer 2 –32,768 to 32,767 Long Long integer type 4 –2,147,483,648 to 2,147,483,647 b

1. Value types and reference types　value types and reference typesCommon types of dataShaping intFloating-point FoaltDouble-precision floating-point doubleStrings stringboolean boolEnum enumValue typeValue types inherit from the System.ValueType class, and each value-type ob

Memsql Principle: combines unlocked data structures with real-time compilers to handle large workloads, lock-free hashtable and lock-free skiplists (a hierarchical linked list structure) are implemented in the memory to quickly access data randomly. Persistence: Although memsql stores data in the memory, it can persist

Java Memory ArchitectureMemory is a temporary storage of data, his storage speed is very fast, but he is a temporary storage, from the start of storage, power-down or shutdown after the loss of all data. The life cycle of memory is the power-on and shutdown, starting when the calculation, shutdown and nothing. The advantages of fast storage, the shortcomings are easy to break off, if the boot, a little refl

language.Its simplicity is mainly reflected in: First, JavaScript is a simple and compact design based on Java basic statements and control flow, which makes it a good transition for users to learn Java or other C language programming languages, and for programmers with C language programming skills, JavaScript is also easy to get started with, and second, its variable type is weakly typed and does not use strict data

according to the original XML and make it suitable to be sent to the physical data storage. Business components can obtain ADO + data, convert it to XML, and send it back to the client. Any application that understands XML can intervene in this architecture at any point. Scalability is the ability of a distributed system to serve a growing number of clients without losing efficiency. Scalability is a term

statement Little Exercise 3Develop a small program that uses package aliases to access functions or variables in the packageMake changes directly to the main package of the previous program Package main Import ( "FMT" a "Go_dev/day02/kexia02/add" ) func main () { fmt. Println (a.name) FMT. Println (a.age) } Little Exercise 4Each source file can contain an init function, which is automatically invoked by the Go run framework, as sho

Although JavaScript is a weakly typed language, it also has several data types of its own, namely number, String, Boolean, Object, udefined, and Null. Where object belongs to a complex data type, object is made up of unordered key-value pairs. The remaining few are simple data type