SQL Server

What is an index?An index is a data structure on a disk that is based on a table or view. Using an index can make data acquisition faster and higher in universities, and also affect some other performance, such as inserting or updating.There are two

Almost every time I show a window in SQL Server, people are very interested to know the difference betweenrows and the RANGE option when you define your window (a specified set of rows). So in today's article I want to show you the difference

Select GETDATE () as ' current date ',Datename (Year,getdate ()) as ' year ',Datename (Month,getdate ()) as ' month ',Datename (Day,getdate ()) as ' Day ',Datename (Dw,getdate ()) as ' Week ',Datename (Week,getdate ()) as ' Week number ',Datename

Today in other computers configured SQl server R2, after the installation is complete, Discovery opens the Configuration management Tools service: Show Remote Procedure call failed: 0x800706be such an error messageBefore this problem was encountered,

In today's article I want to demonstrate how missing indexes on tables in SQL Server cause deadlocks (deadlock). To prepare the test scenario, the following code creates 2 tables, and then 2 tables insert 4 records.1 --Create a table without any

during read in file ' D:\data\BooksDB.mdf ', where the offset is 0x0000011d10400, the operating system has returned error 1117 to SQL Server (this item cannot be run due to an I/O device error Requests)the SQL Server error log and other messages in

Gets a comma-styled string of one of theLike ' 1,2,4,5,6 ', the third one is 4.CREATE function [dbo].[Get_strarraystrofindex]( @str nvarchar(Max),--the string to split @split varchar(Ten),--Delimited Symbols @index int --take the first few

please tell me loudly, which software is the most disgusting. Installed after the computer with a layer of mud paste, shake not clean. Before the hands of the cheap, re-install the system after the SQLSERVER2014 trial version. Unfortunately, after

2nd lesson: Retrieving data2.1 SELECT Statement　　Purpose : Retrieving data information from one or more tables　　 Keywords: reserved words as part of SQL. The keyword cannot be used as the name of a table or column.To retrieve table data using Select,

IntroductionPermission two words, one power , one limit . The popular explanation in the field of software is what people can do with which resources . In SQL Server, "who", "What Resources," "What actions" correspond to three objects in SQL Server,

1--Stored Procedure Learning Chapter2 3--1simple stored procedures with no parameters for learning4IF object_id ('orders_getallorders','P') is not NULL5 DROP PROCEDURE orders_getallorders;6 GO7 CREATE PROC orders_getallorders8 as9 SET NOCOUNT

In recent time, monitoring has found that the number of batch requests per second (batch requests/sec) of a database often increases over a long period of time, hundreds of higher than usual, such as:Because has been relatively high, thought is

A stored procedure in Transact-SQL, very similar to a method in the Java language, can be called repeatedly. After the stored procedure executes once, the statement can be cached so that the statements in the cache are used directly at the next

Disclaimer: This blog only for technical sharing, not as the promotion of my purpose.-----------------------------------------------------------------------------------Recently helped the company finance computer upgrade from Windows XP to WINDOWS7/8

Use AdventureWorks;GO--Turn on CDC functionality for a databaseEXEC sys.sp_cdc_enable_db;GOThe--is_cdc_enabled field is 1 to enable CDC functionality.SELECT name, is_cdc_enabledFrom sys.databases WHERE database_id = db_id ();Use

　　1. IntroductionT-SQL (Transact structured Query Language) is the standard SQL extension that is the primary language for program and SQL Server communication.The T-SQL language consists mainly of the following parts: Data definition

First, the basic concept of indexed viewsAn indexed view is actually a view that "materialized" a set of unique values into a clustered index, which is materialized almost as a table, and its data is stored in one copy (it consumes hard disk space,

SQL Server 2012 provides a special "File table", also known as "FileTable". FileTable is a dedicated user table that contains predefined schemas for storing FILESTREAM data, as well as file and directory hierarchy information, and file attributes.

This article is the eighth article of the SQL Server Agent series, please refer to the original text for details In the first few of these series, you learned how to monitor job activity and view job history with the SQL Server Agent job

The SQL statement is used to calculate the number of working days between two dates. /*Due to a strange demand at work, the SQL language is used to calculate the number of working days between two days.It is set to have 5 working days in a week,