SQL Server

When it comes to clustered indexes, I think every yard knows, but there are a lot of rustic programmers like me that can only use rote memorization to solve this problem, what table can only build a clustered index,Then it pulls in a directory

Original address: Http://social.technet.microsoft.com/wiki/contents/articles/4995.sql-server-columnstore-performance-tuning.aspxSQL Server's Columnstore index is a new version of SQL Server release that improves query performance for the Data

A1. 1 LTRIM (character_expression)-- Delete the starting space in the character variable 2 RTRIM ( character_expression)-- Delete trailing spaces in the character variable 2. Gets the start position of the returned start of the specified string.

SSIS (SQL Server Integration Service) was released by Microsoft from SQL Server2005 and is now followed by each SQL Server version. It's a great tool for Microsoft BI Solutions, and we generally think of SSIS as the ETL (Extract Transform Load)

In the original: a small misunderstanding about @ @error in SQL ServerIn SQL Server, I often see some predecessors write this:if (@ @error<>0) ROLLBACK TRANSACTION T Else COMMIT TRANSACTION TAt first, I saw someone else write it, and I took

First, landingSQL Server two logon mode settings: Windows identity logon, SQL Server identity logon.How do I set up SQL Server authentication?1. Object Explorer Right-click-Properties--Security--sqlserver and Windows identity login.2. Object

Installing the sqlsrv ExtensionFirst SQL Server 2014 installation does not say what the link information set itselfPHP Version: 5.5.12Sqlsrv Drive Microsoft offers 3.0 and 3.1 version 3.0 corresponding to PHP 5.4 3.1 corresponding to 5.5PS:WIN7

Original: Anatomy of SQL Server Nineth Orcamdf can now display metadata through System DMVs (translated)Anatomy of SQL Server Nineth Orcamdf can now display metadata through System DMVs

There is a need in recent work that a more important business table is often inexplicably changed. In SQL Server, this kind of work cannot be done without capturing records beforehand. For capturing changes, the options you can consider include

Learn about DML triggers in SQL Server database today (DDL triggers have time to continue learning later).The trigger executes the SQL statement when you delete a piece of content that creates a trigger in the table.1. The Prime Minister first

Source: Querying SQL Records executed by SQL ServerSometimes, you need to know what SQL Server executes, and you can use the following method:SELECT TOP 1000--Creation timeQs.creation_time,--Query statementsSUBSTRING (St.text,

The previous article summarizes SQL Server Profiler, which is used primarily to monitor the database and to track the generated SQL statements. But it's no use just to get the generated SQL statements, we can use these SQL statements and then

Posted from http://www.sqlservergeeks.com/primary-key-and-unique-key-difference-in-sql-server/Primary and Unique Key both enforce uniqueness of columns on which they is defined. Then where does they differ? They differ in following-A primary key

SQL2012 tips to evaluate expired solutionsTips for evaluating expired workarounds and sql20081th Step: Enter the installation center in the SQL2012 Configuration tool2nd Step: Re-enter the maintenance interface, select Version Upgrade3rd Step: Enter

1. Introduction to Stored ProceduresStored procedures are code snippets written using T-SQL code. In the stored procedure, you can declare variables, perform conditional judgment statements, and other programming functions. There are three main

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

Underlying SQL Server database backup stored procedures/******************************************************************************************************** function: Native BACKUP Database * * danny,li** Date: 2012-11-05**-----------------------

Our company has been doing a CRM system for nearly a year.One problem is that it is very slow to insert the AC record. (large volume of AC recording data)Later, our manager adopted the method of the filegroup, the customer Exchange record this form

1: When a new table does not exist (that is, copy the data while creating a new table with the same structure as the old table) SELECT * to dbo.tablebackup from Dbo.tablenamewhere ID between 0 and 20 2: The new table already exists, inserting

Select CONVERT (varchar), GETDATE (), 0): 2006 10:57amSelect CONVERT (varchar), GETDATE (), 1): 05/16/06Select CONVERT (varchar), GETDATE (), 2): 06.05.16Select CONVERT (varchar), GETDATE (), 3): 16/05/06Select CONVERT (varchar), GETDATE (), 4): 16.0