embedded sql database

SQL Server database optimization solution 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 network speed 6. The

, and spikes in CPU and memory resource consumption occur on the server. System structure The performance problem stems from the whole structure and development process of the system. The application of the Olite system is a Web Form program based on the. NET platform, and the database is SQL Server 2005. Its main structure is as follows: Its application end consists of two sites: Olitebase and Olitereport

Tags: SQL server2012 database ZBLOG Bulk DELETE statementsRecently used Zblog+sql server to build a blog system, using an ASP program, because my data is very small, using plug-ins to generate HTML files, there is no need to use PHP, and I said last time, PHP blog program has some problems, very consumption of resources, And the amount of data can not be done ver

Tags: blog http io ar using strong on file dataThe database is installed and the connection string is required for use in the program. How to write it? Take SQL Server R2 as an example.1, after installing SQL Server R2, similar to Oracle's Plsql tool. SQL Server R2 also has tools, that is,

SQL Server 2000 databases fall into two categories:1. System DatabaseSystem databases are built-in by SQL Server. They are used for management purposes and cannot be changed or deleted at will.2. User DatabaseA user database is generally created by a user, and its use and management are determined by its creator.Six databases were created during

I've been busy learning to convert Access databases into SQL Server databases, and find out a few lessons to share with you. Automatic numbering type in 1.ACCESS database when converting, SQL Server does not set it to AutoNumber, we need to add identity to the SQL creation statement to indicate AutoNumber! 2. When conv

Batch delete database SQL statements and batch Delete SQL statements Because of project requirements, you need to create a database every time you run case. Although it will be deleted at the end of each execution, it is not guaranteed that the deletion will be successful every time (for many reasons, I will not list i

In the previous article, developers need to focus on CPU and memory during the exam. SQL log also can not be ignored, the SQL log shows the database operating system error log, to provide a great convenience for debugging.The test database writes some SQL statements that lis

Tags: style blog http io color OS SP for strongTo synchronize data from Oracle in real time to MS SQL Server, you need to read and write data directly to SQL Server in Oracle, and you can install the Oracle database for SQL Servers component on the Oracle about how to install this component, the Web can not find the de

"Unable to upgrade database... because SQL Server of this version does not support non-release version of this database (539)" solution, sql539 When you use SQL2012 to append a database, the following error is reported: "You cannot upgrade the database... because

death of a driver.conn and a driver.stmt, #原因是sql包的作者想把Stmt和具体的连接解耦, why decoupling is the reason why stmt can be used for a long time (rather than being created and destroyed frequently), but does not want it to occupy a connection for a long time, resulting in a burst of connections, and increasing the difficulty of connection recycling, This also leads to the problem of creating driver on too many connections. stmt instances, this control is not

In the development of the project, often encountered different requirements, compatible with different types of database is one of our project status quo, the level of compatibility with a variety of databases will enable us to develop different types of projects handy, if coupled with rapid framework support, it is icing on the cake. I have developed a project or framework that uses the Microsoft Enterprise Library module, which tends to support mult