How to install JSON-supported SQLite 3.9.1 on Ubuntu 15.04

How to install JSON-supported SQLite 3.9.1 on Ubuntu 15.04 Welcome to read our article on SQLite. SQLite is the most widely used SQL database engine in the world today. It can run without configuration or management. SQLite is a public-domain

MongoDB replication mechanism instance

MongoDB replication mechanism instance MongoDB master-slave replication is a master node that can replicate multiple slave nodes and master nodes. Here, one master node and one slave server use one database server to provide different ports. 1.

Integer Range in 32-bit and 64-bit PHP and MySQL

Integer Range in 32-bit and 64-bit PHP and MySQL A single byte has 8 bytes, so the 32-bit int type occupies 32-bit/8-bit = 4 bytes, And the 64-bit int type occupies 64-bit/8-bit = 8 bytes. 32-bit, 64-bit unsigned integer maximum value:2 ^ 64-1 = 184

Remove time zone and precision from PostgreSQL query results

Remove time zone and precision from PostgreSQL query results I have been using PostgreSQL functions to piece together. Today I suddenly found that it can be so simple, just use timestamp (0) to solve it: Ls => select createtime: timestamp (0)

Why does HBase need to build an SQL engine layer?

Why does HBase need to build an SQL engine layer? The existing SQL solutions are generally not horizontally scalable, so when the data volume changes, it will encounter obstacles. However, with the emergence of NoSQL, it has been greatly mitigated,

Introduction to MongoDB and addition, deletion, modification, and query

Introduction to MongoDB and addition, deletion, modification, and query I. Introduction MongoDB is written in C ++ and is an open source database system based on distributed file storage. MongoDB is designed to provide scalable, high-performance

Manage the logon (start) account and password of the SQL Server service

Manage the logon (start) account and password of the SQL Server service Today, I handled an alwaysOn problem-the secondary copy is always displayed [not synchronized-suspicious] due to insufficient disk space. In the log, we can see that the

MySQL displays data too long for column 'name' at row 1

MySQL displays data too long for column 'name' at row 1 1. symptom: we set the character set encoding of the database to UTF-8. When we insert Chinese characters to a column in the table through the DOS interface, we will encounter a similar

MongoDB sharding simple instance

MongoDB sharding simple instanceParts Another type of cluster exists in Mongodb, that is, the sharding technology, which can meet the needs of a large increase in MongoDB data volume. When MongoDB stores massive amounts of data, one machine may not

Easily solve the problem of too many MySQL database connections

Easily solve the problem of too many MySQL database connections 1. Maximum number of connections allowed by the MySQL database system max_connections. This parameter can be set. If this parameter is not set, the default value is 100. The maximum

MySQL read/write splitting using MyCAT

MySQL read/write splitting using MyCAT MyCAT is a database middleware developed based on Alibaba's open-source cobar product. It is jointly developed and open-source by several talented people with lofty ideals. Provides highly available data

MySQL new features-mysql_config_editor encryption algorithm and Decryption Implementation

MySQL new features-mysql_config_editor encryption algorithm and Decryption Implementation Mysql_config_editor adopts aes ecb encryption. The ECB encryption of AES is usually block encryption. to encrypt data that exceeds the block size, the padding

Build an Oracle10g Database Based on LVM bare devices on Oracle Linux 5.11

Build an Oracle10g Database Based on LVM bare devices on Oracle Linux 5.11 Software: VMware11 Operating System: Oracle Linux 5.11x64Database: Oracle 10.2.0.5 x64Host Name: odb. test. localIP Address: 192.168.223.100 # the VM host network is

ORA-09817 troubleshooting

ORA-09817 troubleshooting ORA-09817 error solved one case sharing. When you log on to a development database, the following error occurs: When an error is reported, the system prompts that the audit file fails to be written because there is no

Perfect distributed transaction support for MySQL 5.7

Perfect distributed transaction support for MySQL 5.7 Two Phase Commit Protocol Distributed transactions generally adopt the 2 PC Protocol, which is the full name of Two Phase Commitment Protocol. This Protocol is mainly used to solve the problem of

Implement master-slave synchronization between two MySQL Databases

Implement master-slave synchronization between two MySQL Databases I. OverviewMySQL versions later than 3.23.15 provide the database replication function, which enables the synchronization, master-slave mode, and mutual backup of two databases.II.

MySQL Tutorial: Build a MySQL Cluster in Linux

MySQL Tutorial: Build a MySQL Cluster in Linux Install fuse for mysql-cluster-gpl-7.4.6-linux-glibc2.5-i686.tar.gz (http://pan.baidu.com/s/1c1bjxVa) The system is a Linux virtual machine. 2 virtual machines (ensure that the firewall is disabled,

Install Redis in Ubuntu 14.04

Install Redis in Ubuntu 14.04 Let's talk about the simple process of installing Redis in Ubuntu 14.04. 1 go to the redis official website to download the latest stable version: http://redis.io/-> Redis 2.8.19 is the latest stable version. (or use

SQLite performance optimization instance sharing, sqlite performance optimization instance

SQLite performance optimization instance sharing, sqlite performance optimization instance The first cache database to be found in iOS development was SQLite, which was also used as the backbone in the future. In the past, SQLite was not used to

Comparison and Analysis of eight common NoSQL Database Systems

Comparison and Analysis of eight common NoSQL Database Systems Krist óf kolács is a software architect and consultant who recently published an article comparing various NoSQL databases. Although SQL database is a very useful tool, after 15 years of

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