ec2 server types

function of the client, the returned client XML Document Object is shown in the structure 3-36 in the Visual Studio debugger. Figure 3-36 Structure of the server-side xmldocument type on the client After the client obtains the returned XML document object, we can perform operations on the object as needed, which is not redundant here. For non-xmldocument or xmlelement types, if we want to, we can a

, 1753 to December 31, 9999, the accuracy is 3.33 milliseconds. 8 bytes DateTime2 From January 1, 1753 to December 31, 9999, the accuracy is 100 nanoseconds. 6-8 bytes smalldatetime From January 1, 1900 to June 6, 2079, the accuracy is 1 minutes. 4 bytes Date Only dates are stored. From January 1, 01 to December 31, 9999. 3 bytes Time Storage time only. The accuracy is 100 nanoseconds. 3-5 by

8000Varchar: Variable Length non-Unicode bytes data, maximum length: 8000Text: Variable Length non-Unicode bytes data. The maximum length is 2 ^ 31-1 (2G)Nchar: bytes data with a fixed length of Unicode. The maximum length is 8000.Nvarchar: variable-length Unicode bytes. The maximum length is 8000.Ntext: String-type data with Extended Unicode length. The maximum length is 2 ^ 31-1 (2G)Binary: binary data with a fixed length. The maximum length is 8000.Varbinary: variable-length binary data with

up to 8000 English and 4000 Chinese characters. It can be seen that when using nchar and nvarchar data types, you do not have to worry about whether the entered characters are English or Chinese characters, which is more convenient, but there is some loss in the amount of stored English hours. 3. Text and ntext. Since SQL server stores data on data pages, each data page is 8 KB, and each data page has some

(9223372036854775807.INT: integer data from-2 ^ 31 (-2,147,483,648) to 2 ^ 31-1 (2,147,483,647.Smallint: integer data from-2 ^ 15 (-32,768) to 2 ^ 15-1 (32,767.Tinyint: integer data from 0 to 255.Bit: an integer of 1 or 0. (4) decimal and numericThe two data types are equivalent. There are two parameters: P (precision) and S (number of decimal places ). P indicates that the Left and Right decimal places can be storedThe maximum number of decimal numb

Tags: style blog http color ar sp data div onLet's take a look at the SQL Server data type table, which lists the most common types: classification notes and description data type description binary data types store non-sub-characters and text dataImageuse to store image text data type character data includes any combination of letters, symbols, or numeric charac

READ (SQL Server default level ). Repeatable read --- repeatable read. SERIALIZABLE --- SERIALIZABLE read (the highest level of transaction isolation, full isolation between transactions ). The following table (1) lists four isolation levels that allow different types of behavior. Isolation level Dirty read Cannot be read repeatedly Phantom Uncommitted read Yes Yes Ye

factors on a pair of results. Model the relationship between the input and the output. To measure the impact of each input on the output and weigh the role of different inputs in the completed model. 9. Linear Regression algorithm Linear regression algorithm is a commonly used method for statistic and prediction, which makes a variant of decision Tree algorithm, helps to calculate the linear relation between dependent variable and independent variable, estimates the best linear equation of pred

server| Data | data type (1) char, varchar, text and nchar, nvarchar, ntext The lengths of char and varchar are between 1 and 8000, the difference being that char is a fixed-length character data, and varchar is a variable-length character data. The so-called fixed-length is constant, when the input data length does not reach the specified length will be automatically filled with English spaces behind it, so that length to the appropriate length, an

server| Data | data type (1) char, varchar, text and nchar, nvarchar, ntextThe length of char and varchar is between 1 and 8000, the difference being that char is a fixed-length character data, and varchar is variable-length character data. The so-called fixed-length is constant, when the input data length does not reach the specified length will be automatically filled with English spaces behind it, so that length to the appropriate length, and varia

-length data, and the index on achar field is highly efficient, such as defining char(10), which takes up 10 bytes of space regardless of whether the data you store is 10 bytes. VARCHARStore variable length data, but the storage efficiency is not high, if the value of a field may be not fixed length, we only know it cannot exceed 10 characters, it is the most advantageous to define it as VARCHAR(10). The actual length of the VARCHAR type is +1 of the actual length of its value. Why "+1"? Th

: Integer data from 0 to 255.Bit:1 or 0 of integer data. (4) decimal and numericBoth of these data types are equivalent. have two parameters: P (Precision) and S (decimal digits). p Specifies the maximum number of decimal digits that can be stored to the left and right of the decimal point, and P must be a value from 1 to 38. s specifies the maximum number of decimal digits that can be stored to the right of the decimal point, s must be a value from 0

(-2,147,483,648) to 2^31-1 (2,147,483,647). smallint: Integer data from -2^15 (-32,768) to 2^15-1 (32,767). Tinyint: Integer data from 0 to 255. Bit:1 or 0 of integer data. (4) Decimal and numeric Both of these data types are equivalent. have two parameters: P (Precision) and S (decimal digits). p Specifies the maximum number of decimal digits that can be stored to the left and right of the decimal point, and P must be a value from 1 to 38. s specifi

type [dbo]. [ContactStruct] as table ( [ContactID] [uniqueidentifier] not null, [FirstName] [nvarchar] (80) not null, [LastName] [nvarchar] (80) not null, [Email] [nvarchar] (80) not null, [Phone] [varchar] (25) not null, PRIMARY KEY CLUSTERED ( [ContactID] ASC ) WITH (IGNORE_DUP_KEY = OFF) ) GO SQL Server Management Studio displays the following results: Now we start to use User-Defined table types to wr

Unicode Character Set is generated to solve the incompatibility problem of character sets. All its characters are expressed in two bytes, that is, English characters are also expressed in two bytes. If you are still struggling with this issue, let's take a look at the explanation below and make a decision. Generally, if you use Chinese characters or other special characters, I will use the type starting with n. Otherwise, I will directly start with var. What is the difference between varchar an

Tags: http ar data Art EF as TT htm SQLThe SQL Server string is divided into different types, and you will be presented with a few common types of SQL Server strings that you can use to help you learn SQL Server strings.NCharThis data type can store 1~4000 fixed-length Unico

SQL Server 2005 compact edition books online Ing Data Types of ole db (SQL Server compact Edition) SQL Server 2005 compact edition converts the ole db data type to the local SQL Server compact edition data type.Data Type ing The following table lists the ing from the l