postgres copy table from one database to another

In a (bad) PostgreSQL query, just a little to change (any (array[...)) to any (VALUES (...) ) will be able to reduce the query time from 20s to 0.2s. From the simplest learning to use EXPLAIN ANALYZE , to learn to use the Postgres community A lot of

0. Remove unnecessary tables and stored procedures from the 200 server Setup database DROP TABLE "Sensorpressure";DROP FUNCTION hex_to_int (text);DROP FUNCTION "Pressuredatatosensorpressure" (); 1. Back up 200 of the SETUPD database,:p g_dump-d-H

First, restore disk space: In PostgreSQL, data rows that are deleted or updated using the Delete and UPDATE statements are not actually deleted, but only the state of the row is deleted or expired on the physical address of the old version of the

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

1 The following table between database objects that can be migrated when migrating from another database to PPAs 2 Installation of PPAs will have the option to install Migreation Toolkit, you can choose to install, you can also download the

one of the ways that PostgreSQL master-slave replication is implemented:Standby-based asynchronous stream replication, which is a nice feature provided after the postgresql9.x version (2010.9), similar functionality is available in Oracle after 11g

Using SECURECRTFirst, the installation of CentOS Rzsz,1.yum Automatic Installation:Yum Install Lrzsz　　　　2. The manual installation method is as follows:2.1. Download software rzsz-3.48.tar.gzwget http://freeware.sgi.com/source/rzsz/rzsz-3.48.tar.gz

Using SECURECRTFirst, the installation of CentOS Rzsz,1.yum Automatic Installation: (yum installation Rzsz)Yum Install Lrzsz　　　　2. The manual installation method is as follows: (the package is a problem, or the first way)2.1. Download software rzsz-3

Abstract: Almost all software project development needs the support of the database, at present, with the rapid development of open source technology, more and more data suppliers choose Open Source database, contribute to the cause of open source.

Hostname 10.1.9.191Port 22Username VrmsPassword CMCCLast Login:sat June 09:58:46 from 192.168.4.17? Vrms@service/home/vrms> suPassword: (rootroot)? Vrms@service/home/vrms> su? Vrms@service/home/vrms> rz (Upload, sz reverse to PC)RZ waiting to