SQL Server

Copy Code code as follows: SET ANSI_NULLS on Go SET QUOTED_IDENTIFIER ON Go /* by Kudychen 2011-9-28 */ CREATE function [dbo]. [Splitstring] ( @Input nvarchar (max),--input string to is separated @Separator nvarchar (max) = ', ',--a

Copy Code code as follows: . cursor Mode 1 DECLARE @Data NVARCHAR (max) SET @Data = ' 1,tanw;2,keenboy '--id,name DECLARE @dataItem NVARCHAR (100) DECLARE data_cursor Cursor for (SELECT * from Split (@Data, '; ')) OPEN

Then you might ask how to get the maximum time value for the current system date, such as Yyyy-mm-dd 23:59:59.997. We can use the DateAdd function to implement, with the midnight time value of the current date plus one day, the midnight time value

There is a forum to see a post, " Consult the query out of the continuous date record method", screenshot as follows: Insus.net tries to write a program and test it to get the expected results, which can be referenced and learned by SQL code.

Many people confuse primary key with a clustered index, or think it's the same thing. This concept is very wrong. A primary key is a constraint (constraint) that is attached to an index that can be either a clustered index or a nonclustered

What is an index Take the table of Contents page of Chinese dictionary (index) metaphorically: Just as Chinese characters are stored as pages in a dictionary, data records in SQL Server are stored on a per-page basis, typically 4K in volume. In

This article gives an SQL statement to display the query between different databases on the same server, noting that the current connected user has permission to two libraries The complete expression of an object in SQL Server SQL statement

Processer:The%processor time processor is busy performing tasks on the 80%, the CPU has bottlenecks or insufficient memory or low query plan reuse rate, not optimized statements and so on.Sqlserver:buffer ManagerBuffer cache Hit ratio buffers to

Of course there are other tools to do this, but the script will work if the client doesn't allow you to mess with the server. Copy Code code as follows: DECLARE @tbImportTables Table (tablename varchar (128), deleted tinyint)

Copy Code code as follows: CREATE FUNCTION F_convert ( @str NVARCHAR (4000),--the string to convert @flag bit--conversion flag, 0 converted to half angle, 1 convert to perfect angle ) RETURNS nvarchar (4000) As BEGIN DECLARE @pat nvarchar

Forms of SQL Server data storage Before talking about several different ways to read, you first need to understand how SQL Server data is stored. The smallest unit of SQL Server storage is a page. Each page size is 8k,sql server is atomic to

Introduction to Database Snapshots A database snapshot, as its name shows, is a view of the database at a point in time. Is the feature introduced by SQL Server version after 2005. There are more scenarios for snapshots, but the first goal of

And every time the Query Analyzer looking for the path, and not every time to statistics the number of rows included in the index, the range of values, but based on certain conditions to create and update the information after the save to the

--View FOREIGN KEY constraints for the specified table SELECT * from sysobjects where parent_obj in ( Select id from sysobjects where name= ' table name ') and xtype= ' PK ' --View All tables SELECT * from sysobjects where xtype= ' PK ' --Delete a

Myth #19: TRUNCATE TABLE operations are not logged to the log Error Actions in the user table are recorded in the log. The only operation in SQL Server that is not logged to the log is row versioning in tempdb. The Truncate table statement

Last Friday, to do a PHP connection to both the MySQL database and the SQL Server database MySQL has been used to SQL Server is not very familiar with, so stones. No other at least MySQL and SQL Server are relatives When you make a conditional query.

1. Summary descriptionThe table partitioning feature of SQL Server is to split a large table (with very many data in the table) into multiple files based on a condition (the table's primary key only) to improve efficiency when querying data. The

A stored procedure is a group of statements consisting of one or more T-SQL statements that can accept input and output parameters and can return multiple values to the calling program, can call other procedures, and can return a result status value

Method one. Click Start-All Programs-microsoft SQL Server 2008-configuration Tools-sql Server Installation CenterThen click on the left side of maintenance, click on the right side of the version upgrade, then follow the prompts always point to the

First step: Create a Wizard FileCreate a TXT file on the desktop and change the file suffix to ". udl". Step Two: Select the Provider tab pageDouble-click the newly created. udl file, enter the Provider tab, and select Microsoft OLE DB Provider