sql server boolean type

nchar data type is used to store fixed-length, uniformly encoded character data. Uniform encoding uses a double-byte structure to store each character, rather than a single byte (in normal text). It allows for a large number of extended characters. This data type can store 4000 characters, which is used to increase the byte space by one times.Nvarchar Unified coded character typeThe nvarchar data

String 21st Binary data Binary Byte[] 22 varbinary Byte[] 23 Image Byte[] 24 Other uniqueidentifier Guid 25 Variant Object PS. Originally intended to reprint trackback:http://tb.blog.csdn.net/trackback.aspx?postid=95675 (SQL Server corresponds to the data

a globally unique identifier, the GUID Char: Character type, storing fixed-length, non-uniform encoded data of specified lengths, column widths must be specified, and column widths up to 8,000 characters varchar: Character type, store non-uniform encoded character data, data type is variable length, to specify the maximum length of the column, the length of stor

In the previous article I've talked about using synonyms to connect to Oracle under SQL Server 2005, and we can use synonyms to connect Oracle under SQL Server 2005 to real-time access to Oracle databases. However, if the table data stream in Oracle affects the performance of the application system, it should be perfor

expression: Data_type The data types provided by the target system, including bigint and sql_variant. You cannot use a user-defined data type. Length Optional parameters for nchar, nvarchar, char, varchar, binary, or varbinary data types. Style A date format style whereby DateTime or smalldatetime data is converted to character data (nchar, nvarchar, char, varchar, nchar, or nvarchar data type) or a strin

Original: SQL Server data type priority impact on performanceTranslated from:Http://www.mssqltips.com/sqlservertip/2749/sql-server-data-type-precedence/?utm_source=dailynewsletterutm _medium=emailutm_content=headlineutm_campaign=2

length of 8000 VARCHAR: variable-length character data with non-Unicode maximum length of 8000 Text: variable length non-Unicode character data with a maximum length of 2^31-1 (2G) NCHAR: Character-type data for fixed-length Unicode with a maximum length of 8000 NVARCHAR: variable length Unicode character data with a maximum length of 8000 NTEXT: variable length Unicode character data with a maximum length of 2^31-1 (2G) Binary: fixed-length binary

Built a table in the database , but because of the SQL Server table function is not familiar with, do not know what to set the primary key to what is good, first set a text type, but later friends told me that the text type easy to make the data file becomes very large, but also It's better to change to an int

Tags: length understanding cannot int use style substring English productObjectivePrevious articles we explained the index of knowledge, this section we continue to explain the following, short content, in-depth understanding.Data typeSQL Server supports two character data types, one is general and the other is Unicode. General data types include char and varchar,unicode data types including ncahr and nvarchar. Each character of a regular character is

Label: TimeStamp The SQL Server timestamp data type is independent of time and date. SQL Server Timestamp is a binary number that indicates the relative order in which data modifications occur in the database. The implementation of the timestamp data

session_id=55 SELECT * from sys.dm_exec_requests where session_id=55 select * from Sys.dm_os_tasks where task_address= 0x00000000005dd948 and session_id=55 select * from Sys.dm_os_workers where worker_address=0x00000008b58fc1a0 SELECT * FROM Sys.dm_os_threads where thread_address=0x000007fffff594a8 Is it a bug or not? Is it still running? How do I undo it? Do you want to restart the SQL Server service t

One: Data type conversion functionWhen you work with values of different data types at the same time, SQL Server typically automatically makes a hermit type conversion. Values that are similar to data types are valid, such as int and float, but for other data types, such as Integer and character types, the Hermit trans

. This time it goes back to the waiting queue inside the suspended state, waiting to be moved to the runnable queue, and for a short time all the other parallel threads have to wait patiently if they are done with their things. This can be clearly seen from the waittime column of the sys.sysprocesses system view.That from the other view sys.dm_os_waiting_tasks can be seen, in fact, very multithreaded are out in the cxpacket waiting state.Cxpacket itself is not a problem. However, like this examp

= @ @ERROR Return End --Check Server version SET @Error = 0 SET @Version = cast (left cast (serverproperty (' productversion ') as nvarchar (max)), CHARINDEX ('. ', CAST (serverproperty (' productversion ') as nvarchar (max))-1) + '. ' + REPLACE (right CAST (serverproperty (' productversion ') as nvarchar (max)), LEN (CAST (serverproperty (' productversion ') as nvarchar (max))-CHARINDEX ('. '), CAST (serverproperty (' productversion ') as n

Quick workaround:reason, when using the ADO entity, the database used by entity is SQL Server 2008,But then the database used in the actual use is SQL Server 2005,Manipulating data of the DateTime type prompts: "The SQL

This article is an example of SQL Server 2005 solution to the maximum data type problem. Things started very simply. Megaware's marketing department wants a new Web site to publish documents, and the development team feels that using a SQL Server 2000 database as

SQL Server (c) grouping type conversion functions insert multiple data String functionsMy own study notes, reproduced please indicate the source, thank you!---sauerkraut1.SQL Data grouping----Group by/having① has a student information sheet: STUID/STUNAME/STUAGE/STUGENDER/STUCLASSID;For each class ID and corresponding

modified on 2012-5-24 8:56:09Last modified by * *NewsThe message could not be sent to the recipient because of a mail server failure. (Use Account 2 (2012-05-24t08:56:09) to send mail.) Exception message: The message could not be sent to the mail server. (The server does not support secure connections.) )。) Cause of error SSL secure Connection not supported Erro

Please check that the DBTYPE node database type is correct in dnt.config, for example, SQL Server, Access, MYSQL Note: An unhandled exception occurred during the execution of the current Web request. Check the stack trace for more information about the error and where the error occurred in the code. Exception Details: System.Exception: Check that the DBTYPE node

Tags: SQL Server data type conversionBoth cast and convert in SQL are expressions used to convert an expression of one data type to another data type. CAST and CONVERT provide similar functionality, except that the syntax is diffe