insert update postgres

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POSTGRES-XL Cluster construction and testing

POSTGRES-XL Cluster construction and testing CentOS6.5 192.168.0.101 CentOS6.5 192.168.0.102 CentOS6.5 192.168.0.103 CentOS6.5 192.168.0.104 First, host planning Cnode1 (GTM) cnode2 (Gtm_proxy,coordinator,datanode) cnode3

Postgres log Utility

Postgres log utility has to say that Postgres logs (pg_log, similar to the oracle alter file, rather than pg_xlog) are indeed flexible and feature-rich, the following are some management functions using ipvs logs. The parameters involved are in the

10 Postgres Tips developers should master in 2016

"Editor's note" as an open source object-relational database, Postgres has been loved by many developers. Recently, Postgres officially released version 9.5, which has been a lot of repair and functional improvements. This article will share 10

Analysis of concurrency control in Postgres and transaction characteristics (Concurrency)

PostgreSQL provides developers with a rich set of tools to manage concurrent access to data. Internally, data consistency is maintained by using a multi-version model (multi-version concurrency control, MVCC). This means that each SQL statement sees

Postgres uses returning to implement last_insert_id of mysql

Postgres uses returning to implement last_insert_id of mysql. Today, I am asked if postgres has inserted a value like mysql and returned the inserted value. This is yes and has higher scalability. Example: [S @ localhost ~] $ Psqlpsql (9.2.4)

Basic introduction of Postgres Database

Recently, I have been working on a project related to PostgreSQL database, documenting the knowledge that I have learned in this process. About PostgreSQL database online already have too many relevant introduction, in order to blog the system or

PostgreSQL Rights Management Create an updatable table for ordinary users

First, the environment$ psql--versionpsql (PostgreSQL) 9.4.4 As we all know, superuser privileges are too large for the security of the database, for non-administrator accounts, you need to create a normal user. Second, the grammar$ psql psql  (9.4.

Postgresql Learning Notes (1)

First, the environment#配置远程连接su postgres vim/var/lib/pgsql/9.4/data/postgresql.conf Edit configuration file listen_address= ' localhost ' before the comment # removed,  And the ' localhost ' should be ' * '; vim/etc/postgresql/8.2/main/pg_hba.conf

Postgres Source directory Structure

1. First Level Catalogue Introduction|_postgres|_ACLOCAL.M4 part of the file used for------------config|_config----------------Config file directory|_configure-------------Configure file|_contrib---------------Contribution Program|_copyright---------

PostgreSQL recovers mistakenly deleted data

In Oracle, deleting a table or deleting a table record; There is a flashback feature that does not require a stop operation and can perfectly retrieve the record. There are, of course, some other recovery tools, such as ODU tools, Gdul tools. can

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