Database Administrator

CentOS 6.5 offline compilation and installation of MySQL 5.6.22 Offline compilation and installation of MySQL 5.6.22 on CentOS 6.5. 1. Download the source code package Http://cdn.mysql.com/archives/mysql-5.6/mysql-5.6.22.tar.gz 2.

CentOS 6.4 RPM installation MySQL-5.6.22-1 Install MySQL at CentOS 6.4 RPM 1. Uninstall the original mysql Because the mainstream Linux systems are basically integrated with mysql Databases Run the following command to check whether the mysql

Oracle tablespace, oracle tableCreate a tablespace for dictionary management create tablespace james datafile '/opt/oradata/orcl/james01.dbf' size 50 M, '/opt/oradata/orcl/james02.dbf' size 50 M minimum extent 50k extent management

OneSQL installation, onesql To install Onesql, you must install MySQL first, and both versions must be consistent. You can complete OnwSQL configuration by using mysqld or mysqld_safe of OnSQL. Http://www.onexsoft.cn /? Page_id = 3391 #

Postgresql query by date range, postgresql date There are several methods to query by date range. The date field type is generally: Timestamp without timezone Method 1: Select * from user_info where create_date> = '2017-07-01 'and create_date

Install Oracle11g + PL/SQL and win8oracle11g in Win8 (64) Recently, Oracle11g is required and PL/SQL is used for management. Software and Hardware Description OS: Win8 64-bit operating system, memory: 8 GB. Oracle_11g_R2 64-bit version PL/SQL

Listener Password and 11gr2listener have been discarded in Oracle Database 11gR2. Listener Password has been discarded in Oracle Database 11gR2 See Deprecation of Listener Password in Oracle Database 11g Release 2 (Document ID

Leetcode Database, leetcodedatabase Leetcode Database implemented using oracle analysis functions Question 1: Department Top Three Salaries select a.depart, a.name, a.salaryfrom (select d.name depart, e.name name, rank()over(partition by d.id order

Favorite common SQL statements and SQL statementsMSSQL Query Select * from class; query all columns in the class of the table. Select * from class; query all columns in the class of the table. select class, teacher from class; queries the column

Connect to MongoDB using Java, operate on mongodb, and connect to MongoDB using java Java is very simple to connect to MongoDB. Specifically, there are two steps:1: import the java-mongo driver package to the new project.: 2: create a link help

MySQL database design best practices for INTEGER types and integer Best PracticesList of storage space and value ranges occupied by various INTEGER MySQL typesBest practices UNSIGNED can only store non-negative integers SIGNED can store

Getting started with MongoDbAfter downloading mongodb, add "directory \ mongodb \ bin" to the environment variable"Open the cmd window-- Enable the mongodb ServiceMongod-dbpath "D: \ mongodb \ db"-- Register a serviceMongod-dbpath "D: \ mongodb \ db"

Mysql5.5.27 master-slave replication and mysql5.5.27 master-slave ReplicationMaster-slave replication principle: 1. Copy the architecture Diagram 2 initialization Diagram 3 replication Principle Mysql uses three threads to execute the

[] How to modify data of a table in batches in sqlserver, 2015 sqlserver During the past few days of exercises, I encountered a small problem. For example, if I had a score initialized to 0 in all the tables, I want to randomly generate less than 100

Mybatis performance optimization: reducing database connections and mybatis Performance Optimization The most important function for performance optimization is to reduce the interaction between databases. Many programmers generally only consider

Beckham _ redis learning goal, Beckham _ redis goalRedis learning objectivesI. About NosqlIi. redis IntroductionIii. Applicable scenarios of redisIv. Learning objectives of redis     I. About Nosql Nosql (Nosql = Not Only SQL) refers to the anti-SQL

Mybatis + Oracle batch processing, mybatisoracle 1. Batch insert In many cases, data insertion is involved. The MySQL dynamic SQL statement can solve this problem well. Of course, oracle has provided the batch insert statement: insert into students

Create/delete a PostgreSQL database.Method 1-system commandsSudo su-postgres # Switch to postgres user (system user)Createdb weichen # create a databasePsql # access the database directly (access to the local ipvs database by default)\ L -- view the

Ubuntu mysql cannot be started for simple troubleshooting. tumysql My website has not been on for a long time. I want to open it and find that it cannot be opened, so I found a series of reasons. After a simple investigation, my vps service was

Path had bad permissions error solution when Mac OS X is started, pathpermissions Recently, I encountered the above prompt when installing mongodb. I found no solution for various Chinese websites, so I checked the foreign websites and finally