Database Administrator

Because MongoDB's document structure is BJSON format BJSON Full name: Binary JSON), and BJSON format itself supports saving data in Binary format, therefore, the binary data of the file can be directly stored in the document structure of MongoDB.

In the previous article "database entry-level algorithm 1", we introduced some data algorithms. Now we will continue to introduce some basic sorting algorithms. Bubble Sorting Usage conditions:The element of the set can be compared to the

Introduction:I have been engaged in database development and design, and I have read some books. A long time ago, I wanted to sort out and summarize the relational database design. However, for various reasons, I was too late to start the work,

With the development of technology,DatabaseA great leap has also been made, and the technology is becoming more and more advanced. However, despite this, database knowledge still needs to be mastered by every user who learns the database, the

After 1960s, with the widespread application of computers in the field of data management, people put forward higher requirements on data management technology: they hope to organize data with data as the center for enterprises or departments,

References: Http://www.cnblogs.com/wuhou/archive/2008/09/28/1301071.html Http://www.hebaodans.com/2009/02/m-y-s-q-l-shu-ju-ku-de-tong-bu-wen-ti-shuang-ji-re-bei/ 1. Install the latest Ubuntu Server version and update the system. 2. Install MySQL

The content of most websites is stored in databases and accessed by users through requests. The database is very fast. There are a lot of skills that allow you to optimize the database speed, so that you do not waste server resources. In this

One-to-one relationship: Embed. For example, the user information set has the Address field and the Address field has three fields: province, city, and county. The modeling is as follows: One-to-many relationship: a single article has multiple

The first thing you need to do is to make sure that xp_cmdshell is available. You can choose one of the following two methods to achieve this. 1. You can use sp_configure and execute the following script. EXEC master.dbo.sp_configure 'show

Use Oracle Database 10 Gb to efficiently store and manage segments by recycling wasted space, reorganizing online tables, and evaluating growth trends. Recently, someone asked me to evaluate an RDBMS competing with the Oracle database. During the

Top The top command displays the process, CPU, memory, load, and other information of the Linux system in real time. It is the best tool for us to understand the overall state of the system. The running status of the top Command is a real-time

I. Shared pool tunning The Optimization of the Shared pool should be given priority, because a cache miss occurs in the shared pool, which is more costly than the data buffer, because the dictionary data is generally longer than the data stored in

Database optimization considerations: 1. Create an index for the key fields. 2. Using Stored Procedures makes SQL more flexible and efficient. 3. Back up the database and clear junk data. 4. SQL statement syntax optimization. You can use Sybase

Oracle's security measures mainly include three aspects: user identification and authentication; authorization and inspection mechanisms; and audit technology (whether to use audit technology can be flexibly selected by users ); in addition, Oracle

It is not limited to the AIX environment. Other platforms (such as Unix, Linux, and Windows) can follow the same steps to perform the same upgrade operation. After completing the instance upgrade steps: ◆ Upgrade database products to the latest

Low Carbon index: To facilitate computing and visualization, we use the TDP of Intel Xeon X7500 processor as the standard to calculate the energy consumption TDP = 130 W/h = 2.167 W/m = 0.036 W/s ). In addition, according to data from the China

To use SQL to obtain the current date, time, and time stamp, see the appropriate DB2 register: SELECT current date FROM sysibm.sysdummy1 SELECT current time FROM sysibm.sysdummy1 SELECT current timestamp FROM sysibm.sysdummy1 The

BKJIA exclusive feature: Compared with Oracle 8i and Oracle 9i, Oracle 11g has greatly improved database backup, especially the true application cluster RAC, which is part of Oracle's maximum availability architecture (locally. Oracle 11g now makes

During Oracle development, If you test your application independently, deploy the application, and submit it to dozens of concurrent users, it is very likely that the concurrency problems that were not previously detected will suffer. For example,

In Oracle databases, managing environment variables is troublesome. When you deploy an Oracle database on a Windows operating system, the database installer automatically sets Oracle-related environment variables. However, when you deploy an Oracle