SQL Server

SELECT TOP--Creation timeQs.creation_time,--Query statementsSUBSTRING (St.text, (QS.STATEMENT_START_OFFSET/2) +1,(Case Qs.statement_end_offset WHEN-1 then datalength (st.text)ELSE qs.statement_end_offset End-qs.statement_start_offset)/2) + 1) as

1. Case all keywords in the uppercase T-SQL language are capitalized, specification requirements. 2. use ";" Use ";" As a Transact-SQL statement terminator. Although a semicolon is not required, it is a good practice to use it, and you must add ";"

Initial selection ResultsSELECT * FROM WorddictionaryThe following is the alphabetical order by Chinese charactersSELECT * from Worddictionary ORDER by word collate chinese_prc_cs_as_ks_wswhich_ci (CS) is case sensitive, CI is not differentiated, CS

Setup Steps Enter SQL Server Management Studio(MSSQL client) Select Security , login name , right-click New Login Enter user name and password in general In user mappings , "users mapped to this login" Select a database that the

If you only need to insert data in large batches using bcp is the best, if you need to insert, delete, update the recommended use of SqlDataAdapter I have tested very high efficiency, in general, these two will meet the needs ofBCP modeCopy CodeThe

Http://www.ynpxrz.com/n822732c2024.aspxWe know: SQL Server restart is divided into two steps.1. Stopnet stop MSSQLServer2. RestartNET start MSSQLServer3. Add MySQL stop, start commandnet stop MySQLnet stop MySQLBookmark this page. You won't forget

ObjectiveThe query optimizer uses statistics to create query plans that improve query performance, and for most queries, the query optimizer has generated the necessary statistics for a high-quality query plan, but in rare cases you need to create

SQL Server logs and agent error days are usually automatically switched after the instance restarts, and if the instance has not been restarted for a long time, it may accumulate too many logs and is inconvenient to view.Log switchover: (Requires

The solution to this problem:First step: Enter the Database Manager in Windows Authentication mode.Second step: In the new Explorer right-click the instance name select Properties, pop up the server Properties dialog box, we select the "Security"

1.sys.objects: Objects within each user-defined schema scope that are created in the database (such as tables, views, constraints, defaults, logs, rule stored procedures, and so on, but not including DDL triggers) have one row in the table.

The SQL Server DEFAULT constraint is a constraint in a SQL Server database, and the following describes how SQL Server default constraints, column constraints, and table constraints are defined for your reference.SQL Server Default ConstraintsThe

This basic full reference: Sql--sp_addextendedproperty and sp_updateextendedproperty (Transact-SQL)Three stored procedure usages, take sp_addextendedproperty as an example:sp_addextendedproperty[@name =]{'property_name' } [, [@value =]{'value' }

To understand the execution plan, you have to understand it, the various nouns. Since I don't know much about it. This article is intended as a write-only, do not understand the understand before writing.At the beginning, it is important to note

1 UseMaster2 Go3 Select * fromsys.dm_os_buffer_descriptors4 Go5 6 --View the amount of space the database occupies in the data cache7 --128 Bytes, 1/8 kilobytes (KB) because each data page corresponds to a row in dynamic management view

meta-data functions　　1. Get the database identifier DB_IDThe DB_ID function is used to get the unique ID (int data type) of the current database, and the database ID is used to uniquely differentiate the library on the server.Syntax structure:DB_ID (

First, basic unit "page" SQL Server uses a 8KB page to store the data. Physical I/O operations are also performed at the page level. There are many types of pages, specific references (MSDN). We focus more on the structure of the data page,

Brief introductionIn SQL Server, each query will find the shortest path to achieve its own goal. If the database accepts only one connection at a time, only one query is executed. Then the query is, of course, M.F.B. s to complete the work. For most

The first two days of the lesson summary of the following, generally in the connection layer basically call those classes.Generally includes three classes of System.Data.SqlClient and System.Data under Sqlconnection,sqlcommand,sqldatareader. If you

Transferred from: http://www.canway.net/Lists/CanwayOriginalArticels/DispForm.aspx?ID=476In some large web sites or applications, a single SQL Server server may have difficulty supporting very large access pressures. A lot of people at this time,

The SQL statement is used to query the Index usage and the index status of the SQL statement. SELECT sch.name + '.' + t.name AS [Table Name], i.name AS[Index Name], i.type_desc, ISNULL(user_updates,0) AS [Total Writes], ISNULL(user_seeks +