SQL Server

SQL Server table indexes have the sparse feature. The larger the table is and the more frequently accessed it is, the more appropriate adjustment factor is needed. The fill factor option of SQL Server table indexes is the most common method

Prevents repeated inserts when a record is inserted. Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Insert   Into   [ Catchpage ] . [ DBO ] . [ Gdlmo_yq ] (

By Mikael 1. January 2009 This is due to the edmx file being generated or updated from a SQL 2008 instance and run against a SQL 2005 instance. I tried about every trick I coshould think of before reading about it here. basically all you need to do

Constraint is a method provided by Microsoft SQL server to automatically maintain database integrity. It defines the conditions for data in a single column of an input table or table. There are five constraints in SQL Server: primary key

-- 1. What file does SQL consist? /* Answer: SQL is composed of data files and log files */ -- 2. What are the two types of SQL data files? What are the extensions? How many can there be? /* Answer: SQL data files are divided into primary and

During database initialization, an actual problem that administrators need to face is how to import large amounts of data into the database system. Some large-capacity data import and export tools are provided in the SQL Server database for the

/************************************ **************************************** ****** * * Function Description: backs up and recovers SQL Server databases * Author: Liu gongxun; * version: v0.1 (C #2.0 ); time: 2007-1-1 * when using SQL Server,

SQL Server 2000 user SA logon Failure Solution I. log on to the control panel-> services-> ms SQL Server-> Local SYSTEM account-> restart ms SQL ServerLog on to the query analyzer using Windows verification -- execute sp_password null, sa

When using a database, you often encounter database migration or data migration problems, or sudden database damage. In this case, you need to directly recover from the database backup. However, a problem may occur at this time. Here are several

In the second half of my senior year, I finished my graduation project and went out for an interview,Many of them want to understand JSP, so I started to learn JSP,At the beginning, it was hard to get stuck. The problem of connecting to SQL Server

I took over an optimization project in the previous section, which requires that the company optimize the indexes of more than existing tables to improve the existing ones and eliminate invalid indexes. In view of the serious shortage of manpower

You need to know that the thread wait time is an important factor restricting the efficiency of SQL Server. This article will learn how to collect information such as the thread wait time and type in SQL Server, this information is the basis for

Drop table # TMP -- delete a temporary table # TMP Create Table # TMP -- create a temporary table # TMP ( Id int identity () not null, -- creates a column ID and Adds 1 to each new record. Wokno varchar (50 ), Primary Key (ID) -- Define ID as a

Stored Procedures, functions, and trigger code in SQL Server are stored in SYS. SQL _modules. Return a line for each module object defined in the SQL language. Objects of the P, RF, V, TR, FN, if, TF, and r types are associated with SQL modules. In

In SQL Server 2000/2005, in addition to using DTS for data import and export, you can also use a Transact-SQL statement to import and export data. In a Transact-SQL statement, we mainly use the OpenDataSource function and OpenRowset function. For

Some common performance problems in SQL Server: 1. When optimizing the query, try to avoid full table scanning. First, consider creating an index on the columns involved in where and order. 2. Try to avoid using left join and null values. Left join

SQL ServerFour isolation-level knowledge points are organized, and a flowchart is specially created for later viewing! SET transaction isolation level{ Read uncommitted | Read committed | Repeatable read | Serializable } 1. uncommitted read

In SQL Server, datetime-type operations   To operate SQL server data, you need to set the time, minute, and second of a date field, that is, '2017-11-07 16:41:35. the 033 'is changed to '2017-11-07 00:00:00', so I checked the SQL syntax for datetime-

Case has two formats: Simple case function and case search function.  -- Simple case Function Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Case sexWhen '1' then 'male'When '2' then 'female'Else '

SQL Server Index Structure and usage (4)Author: freedk I. An in-depth understanding of the index structureIi. Improve SQL statementsIii. General paging display and storage process for small data volumes and massive data Importance of clustered index