SQL Server

First, build a library tableUse masterif exists (select 1From sysobjectsWHERE id = object_id (' testsum ')and type = ' U ')drop table TestsumGoCREATE TABLE Testsum(ID int identity (+),Name nvarchar (") Default ("),TypeName nvarchar (") Default

Tag:declare   sum   post    Plan    class    float   --   blog   rom    DECLARE @ Battery table table (date int, day capacity float, planned power yield float, daily average yield float) insert INTO @ battery Gauge Select 1,3.8788,null,3.8024 INSERT

--Create a databaseCreate DATABASE Online test systemOn(Name= Online examination System _data,Filename= ' E:\DB\ online exam system _data.mdf ',SIZE=5MB,MAXSIZE=20MB,filegrowth=5%)Log On (Name= Online examination System _log,Filename= ' E:\DB\

--1. Creating a new Sqlserverext project, writing a C # method to generate a SqlServerExt.dll fileUsing System;Using System.Data;Using System.Data.SqlClient;Using System.Data.SqlTypes;Using System.Text.RegularExpressions;Using

SQL Server DB engine (relational engine), the SQL language is used to describe the problem to the Engine. Algebrizer: Algebra, checking the syntax, and converting the query into an internal expression Query Optimizer: Queries Optimizer. Use

1. Declaring cursorsDECLARE cursor name CURSOR SELECT statement (NOTE: This must be a SELECT statement)2. Open the cursorOPEN cursor Name3. Reading cursor dataFetch [Next | Prior | First | Last | Absolute N | Relative N] from cursor name into @name1,

1. sp_help Report about database objects (all objects listed in Sys.sysobjects compatibility view)sp_help table name, stored procedure name, etc.2. sp_helpdb report effective information about the databasesp_helpdb database name3. sp_helptext

SQL wildcard charactersThe SQL wildcard can override one or more characters when searching for data in a database.SQL wildcard characters must be used with the LIKE operator.In SQL, you can use the following wildcard characters:

Global variable format: @@***These variables are system-maintained and do not require our own definition, and are generally used to view information. The most used @ @error in the stored procedure to determine if there is an error message. One, @

Examples of data are:To get the result of the target, get the same type of all names stitching together the string:SQL Server does not have a direct concatenation of the function of the string, the method mentioned below, just the daily development

Background: The SQL Server 10s interval invokes the PowerShell script.Description of the phenomenon:Normal operation 180 times or so after the errorError message: IfHistory log does not see specific details errors, and running PowerShell scripts

　　A primary replica that is used to host the primary database. The primary replica makes a set of primary databases available to read and write connections to clients.You can configure one or more secondary replicas to support read-only access to

Add sa password Open netbackup MS SQL Client on SQL Server 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/95/9F/wKioL1kXxaviOq4OAAHXDt2usNc112.png "/> Add sa password 650) this.width=650; "src=" Http://s3

Starting with SQL Server 2005, we can support recursive queries directly through a CTE, which is a common table expressionBaidu EncyclopediaA common table expression (CTE), which is a temporary named result set that is defined in a query, is used in

Create database db001;--Create a tableCreate Table Job (ID char (TEN) not null,name char (100) is not null,address Char);--Delete Tabledrop table jobtable2;--Inserting valuesUse db0001GoInsert into job values (' 1 ', ' 2 ', ' 3 ');INSERT into job

1. How to split IP addresses in SQL ServerFor example, there is an IP address of 192.168.0.82, or, how to split a packaging ratio, such as 1:5:3Using the ParseName method, you can achieve:Select ParseName (replace (' 1:5:3 ', ': ', '. '), 1)The

Say the question first.Results of direct SQL executionvar result = base. Context.Customers.SqlQuery (SQL);　The SQL statement is a break point, the connection is also a database, but the results are inconsistentIt is also correct to use

The actual requirements in the project, you need to write a gadget to import the original SQL Server old database into the MySQL database on the new system at timed time.1, EF entity file generation not to mention, there is no need to pay attention

Explain how SQL Server modifies the location of database physical files, SQL Server Preface We should all know that when SQL Server creates a new database, it will store the data in disk C by default. Once there is more storage data in the database,

SQL gets the implementation of all superiors, and SQL gets the implementation of superiors SQL to obtain the implementation of all superiors Note: (1) You can create a function and call it directly; (2) M0Org is a database table. M0OrgPID is the