sql database cleanup

50 methods to skillfully optimize your SQL Server database There are many reasons for slow query speed. The following are common causes: 1. No index or no index is used (this is the most common problem of slow query and is a defect in programming) 2. Low I/O throughput, resulting in a bottleneck effect. 3. the query is not optimized because no computing column is created. 4. Insufficient memory 5. slow net

First, we should know that the database is always in a specific State. Next, let's take a look at three common statuses of the database: 1. Offline: we can see the database in Microsoft SQL Server Management, however, the database name is suffixed with "offline", indicating

Tags: PAC system SQL interface recover backup Sha off iceThis article mainly introduces the SQL Server2008 R2 Database Mirroring Implementation Manual (dual-machine) SQL Server2014 also applicable, the need for friends can refer to the followingFirst, configure the main standby machine 1, Server basic information The h

Designing 1 of applications does not seem to be difficult, but it is not easy to achieve the optimal performance of the system. In the development tools, database design, should The structure of the program, query design, interface selection and so on have a variety of options, depending on the specific application requirements and development team skills. This article takes the SQL Server, for example, dis

SQL database optimization Summary: Millions of database Optimization Solutions, There are many tutorials on SQL Optimization on the Internet, but they are messy. I have made some preparations recently, and I will share some of them with you. There are some errors and deficiencies. Please correct them. (1) select the mo

How to: Install the SQLServer2005 first, and remember the user name and password that you set up when you installed it. The following steps are described in the example of the database file Epdmdb20101008.bak for the SQLite database, which is backed up by restoring SQL Server. ① opens the SQLServer2005 as shown in the following illustration: Enter the login

SQL Study Notes (19) ----------- about MySQL database optimization and mysql database Optimization A mature database architecture is not designed with high availability, high scaling, and other features at the beginning. It is gradually improved with the increase in the number of users. This blog post focuses on the pr

PHP executes the SQL file and imports the SQL file to the database ,. PHP executes the SQL file and imports the SQL file to the database to read the file content $ _ sqlfile_get_contents (test.

Migrate the ACCESS database to the SQL Server database ACCESS2000 file and use ACCESS2007 to open the ACCESS2007 database in SQLSERVER2005. Method 1: use the database migration tool that comes with ACCESS2007. 1. Open the database

, "purpose" does not need to be modified, select the server (generally under their own native local, you can also select the server address or LAN address, determine whether your permissions can operate,), using Windows authentication refers to use their own system administrator identity operation, Use SQL identity operations to validate actions that can be used with Web sites, and recommend the latter. 7, select the use of