Database Administrator

Test conclusionMysql 5.1Table type: innodb, row_format = compact (this is the default row format)Insert more than 10 blobs. The blob data volume is small (Insert more than 10 blobs, The blob data volume is large (> 768 bytes), insertion failed: Got

Abstract: implements network communication between host machines and virtual machines Environment: Host operating system Windows XP Virtual Machine Software VirtualBox Virtual Machine operating system Linux   Principle: Host-only (host Mode) In

In the soft exam, when we encounter very simple questions, we must obtain all the scores, and the process must be fast and efficient. In this blog, I will share my afternoon question-making skills (data flow chart) and teach you how to get high

ORA-01925: maximum of 80 enabled roles exceededMax_enabled_roles 9i parameter, 10 Gb or later. Specifies the maximum number of enabled roles for a user session.MAX_ENABLED_ROLES specifies the maximum number of database roles that users can enable,

Official: http://redis.io/download In the win64 column, we can see that there was no windows version for redis, and the windows version was developed by the Microsoft Open Tech team. Given a github link: https://github.com/MSOpenTech/redis Download:

The undo tablespace is an important part of the Oracle architecture. The reason why we can roll back is that we have it. Any data modification in the database will generate the pre-image in the undo tablespace. One is rollback, and the other is

Today is. I/o throughput is one of the factors that affect data redo. oracle media recovery depends on I/o, if I/o has a bottleneck, it will inevitably affect the restoration of the media in the slave database. I/o stack contains hbas, storage

This is an exam for 2014 Alibaba intern on the Beijing site: In MySQL, indexes belong to the storage engine level. Different storage engines implement indexes differently, such as MyISAM and InnoDB Storage engines. MyISAM index implementation: The

Java Web Learning Communication Network (IMITATING Baidu Post Bar) I. Tutorial Purpose 1. Connect to the MySQL database 2. Read the database to the web page  Ii. Lab requirements 1. Design a post bar so that users can register, ask, and answer 3.

With the release of ArcGIS10.1, more users gradually accept the use of ArcSDE for direct connection, not only because direct connection is a trend (service connections will be discarded later ), more importantly, the direct connection performance is

AlwaysOn has been released for a long time since SQL Server2012. Recently, When I consulted some customers, I was often asked if AlwaysOn should be used, from the customer's perspective, it seems that AlwaysOn is a cure for all diseases, but there

This article will not be practical. Some resources are quite good. Let's share a link with you. The online cool predecessors can always create benefits for our elders !!! Young !!! Haha! I have found a good website on the Internet, which is better

I. Installation ErrorQ: I have installed phpPgAdmin, but when I try to use it,I got an error saying that the php I installed does not support correct database compilation. A: This information indicates that your PHP does not compile PostgreSQL

The dbms_stats package can be used to collect statistics. The following syntax is usually used: exec dbms_stat.gather_table_stats (ownname => 'xxx', tabname => 'xxx', estimate_percent => xxx, method_opt => 'xxx', cascade => xxx ); Among them,

Ru Zhiqiang said in "zookeeper", "Looking at Hongying again, it was not even a half-hour's work that would be delayed, and she never saw her eat a snack, at first glance, you will know that it is a person who will be careful and live." Some people

Splits strings.MYSQL version. Because MYSQL does not support recursion and does not support returning results of the table type, the code is cumbersome. I use two functions and a stored procedure.-- Obtain the total number of delimiters. DELIMITER $$

To test a DG problem, set up a test environment on Vmware and place primary and standby on the same host.I will not repeat the setup process, but I encountered some problems at the end. Record them here for future reference. ---- Some commands

Index, which allows you to quickly access specific information in a database table. An index is a structure that sorts the values of one or more columns in a database table, such as the name column of the employee table. If you want to search for a

Running Environment: Ubuntu + Oracle 11.2.0 ORA-12547: TNS: lost contact error occurs when the command starts oracle. Good afternoon, no matter in the afternoon. If the link is invalid, it will not work after Shutdown and restart. Then google found

After the project was completed, we found the tragedy. By default, sqoop was used to list data tables from Oracle databases. If the data accuracy is greater than 15 digits, some fields in the imported table are of the double type by default. As a