SQL Server

Although the partitioning has many advantages (a) SQL Server partition partition, but not at will, and do not say that the complexity of partition management, only the negative impact of cross-partition, we need to carefully analyze whether it is

I. Introduction of SQL Server partitioningIn SQL Server, all tables and indexes of a database are treated as partitioned tables and indexes, and the default tables and index values contain a partition, which means that the table or index contains at

--sql constraints/*(1) A mechanism for providing semantic definition of integrity constraintsEntity integrity: Primary key, non-null???? Referential integrity: FOREIGN key???? User-defined integrity: check, Trigger(2) Provide integrity check method??

SQL SERVER default tracking app 3--Detection ofDDL operations for tablesDDL operations that occur on the SQL Server database, can you tell who did it?Yes. The SQL Server default trace has object modification events.This script lists all the object

When talking about database performance optimizations, it is common to refer to "index", but many people do not really understand the index, and do not know why the index can speed up the retrieval, so that in practice, the index is not good to

Original: SQL Server remotely deletes data performance problem resolution via linked serversIn the previous article, the workaround for SQL Server access to Oracle performance issues through linked servers is described in this article, which

Before for the auto-generated brackets, always feel that there is no need, until today encountered this small problem, only to find the meaning.SELECT TOP [_userid], [_username], [_pwd], [_email], [_QQ]from [Haqiu]. [dbo]. [User]Because I built the

Find an article on the internet, pretty good Oh O (∩_∩) o~This is the SQL script that calculates the first day of the one month:SELECT DATEADD (mm, DATEDIFF (Mm,0,getdate ()), 0)--the first day of the monthSELECT DATEADD (mm, DATEDIFF (Mm,0,getdate (

The so-called deadlock, mainly because process B to access the resources of process A, and process a for a variety of reasons, do not release the resources they occupy, so the database will always be in a blocking state. Four Prerequisites:

SQL2008 expression: Is any combination of constants, variables, columns, or functions, and operators.1. String functionsFunction Name Parameter Example descriptionASCII (string expression)Select ASCII (' ABC ') returns 97Returns the ASCII code of

The next article is to record their own blind spots, but also reveal their own development process (may not be developed, can only be said to be blind). Of course, some blind spots are also in the process of work and exploration slowly some, now

SQL Server Data Archiving scenarioPurposeThis article is intended to provide a solution for archiving SQL Server Big data tables from a database management aspect. It can be used as a reference for the project design when the new business is on line.

--SQL SERVER determines if there is a trigger, stored procedure--Determine the storage process and delete if it existsIF (EXISTS (SELECT * from sysobjects WHERE name= ' procedurename ' and type= ' P '))DROP PROCEDURE procedurename--Judgment trigger,

Related queries (in the same table)Related queries are similar to subqueries, but are different from subqueries, and sub-conditions in subqueries can be isolated from data, but sub-conditions of related queries cannot be investigated. (Can be

Searching the Internet for cross-server queries, presumably linked server (pre-storage connection mode and ensure connectivity) and OpenDataSource (written in the statement, the portability of strong). Depending on the function used, the performance

Original: SQL Server add external Assembly basic operationsSummary: Sometimes SQL Server built-in functions are not so useful, you can reference the external assembly, under the ugly, do add external assembly operations1, prepare the program,

A trigger is a special type of stored procedure that differs from the stored procedure we described earlier. Triggers are triggered primarily by an event that is automatically invoked to execute. The stored procedure can be called by the name of the

numbering Database Type JDBC Type JDBC Index Description 1 Int Java.lang.Integer 4 2 varchar Java.lang.String 12 3 Char

When working with SQL Server relational databases on a daily basis, there are times when the database (for example, SharePoint site configuration database name Sharepoint_config) is not functioning properly, such as the database stopping the

First, start the installer, click on the "Install" tab, select "New SQL Server standalone installation or add features to an existing installation". (Select this option for the first time you install a database system or add functionality to an