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PostgreSQL Advantage, MySQL database itself is not very rich, trigger and stored process support is weak, Greenplum, AWS Redshift, etc. are based on PostgreSQL developed

PostgreSQL Advantage2016-10-20 21:36 686 People read comments (0) favorite reports Classification:MySQL Database (5)PostgreSQL is a free object-relational database server (database management system), which is very powerful. Includes support for the world's richest data types, such as IP types and geometry types, among others.Many readers have asked the question: If you plan to choose a free, open-source database for your project, you may be hesitant between MySQL and PostgreSQL. In response

AWS pushes the data warehouse service Redshift price only for TeradataIBMOracle

[CSDN report] Some time ago, an article was published on Gigaom: whatunbelievablenewservicesdoesAmazonhaveontap? Now we know at least one of them, Amazon's incredible new service, Redshift data warehouse service, points to Oracle, IBM, and Teradata. [CSDN report] Some time ago, an article on Gigaom was published: what unbelievable new services does Amazon have on tap? Now we know at least one of them, Amazon's incredible new service,

The constraint strategy of redshift

Official Document: Http:// does not provide uniqueness, primary foreign key constraints, but provides non-null constraintsIf the effect of a constraint needs to be used before the table is built, you need to ensure the legitimacy of the data itself.See also the CREATE syntax

Amazon Redshift Analytics Database features--essential or column storage

Tags: and redshift BSP Select HTTPS based solution Add tarAmazon Redshift is a fast, fully managed, petabyte-scale data Warehouse that enables you to cost-effectively and easily analyze all your data with existing business intelligence tools. From a minimum of 0.25 USD per hour (without any obligation) up to $ (PB) per terabyte/TB/year, the cost is less than one-tenth of the traditional solution. Customers

S skills, Postgres skills

S skills, Postgres skills If you need to add indexes when the business volume is large, you need to use CONCURRENTLY. Otherwise, your database will easily break down. For example create index CONCURRENTLY idx_order_records_bank_statist_uid on order_records(statist_uid) See Http:// In a large business volume, if you want to execute some time-consuming database tasks, sometimes you will fin

POSTGRES-XL Cluster construction and testing

POSTGRES-XL Cluster construction and testing CentOS6.5 CentOS6.5 CentOS6.5 CentOS6.5 First, host planning Cnode1 (GTM) cnode2 (Gtm_proxy,coordinator,datanode) cnode3 (Gtm_proxy,coordinator,datanode) cnode4 ( Gtm_proxy,coordinator,datanode) Cnode5 (Gtm_proxy,coordinator,datanode) Second, configure host hosts on each node #vim/etc/hosts cnode1 cnode2 192.168.

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 file $ PGDATApostgresql. conf. OS: CentOS6.2DB: Postgre Postgres log utility has to say that

Discovering the computer science Behind Postgres Indexes

The last in a series of Postgres posts, Pat Shaughnessy wrote based on he presentation at the Barcelona Ruby Conference. You can also watch the video recording of the presentation. The series was originally published in his personal blog, and we is republishing it on codeship with his kind permission. You can also read posts one, both, and three in the series.We all know indexes is one of the most powerful and important features of relational database

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 Postgres usage tips, which are designed to enable developers to use the database more flexibly and efficiently.During th

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

provided by using the revolutionary serializable snapshot Isolation (SSI) level. Today we start with the basics of PostgreSQL and talk about the features of MVCC and PostgreSQL. Here, we first use a table to show the level of transaction in PostgreSQL, and we can turn it back when we see the later chapters. 1. Basic Knowledge 1.1 Transaction ID When a transaction begins, the transaction management system in PostgreSQL assigns a unique identifier, the transaction ID (TXID), to the t

? POSTGRES-XL: PostgreSQL-based open source extensible DB cluster

Tags: distributed database? POSTGRES-XL: PostgreSQL-based open source extensible DB cluster The recent year the industry to the "IoE" more calls louder, many traditional enterprises have to go to the "IoE" program on the desktop. I always wonder what motivates these non-internet companies, such as banks, to do such things. Tall on the "self-control", "Revitalization of National Science and Technology" and other empty slogan first not to tube, the r

Postgres XL FAQ

Q. What does XL stand? XL is short for extensible lattice. It also connotes an extra large version of postgresql, in this case when SS multiple systems. Q. Is this a "nosql" solution? No, ipvs-XL supports traditional SQL, stronugly conforms to ansi SQL: 2008, is fully acid, all while being scalable. you can however certainly use it as a key-value store and take advantage of JSON and hstore functionality. Q. Is the data "sharded "? Yes. postgres-X

POSTGRES-XL Cluster Construction

POSTGRES-XL is a fully acid-compliant, open-source, easy to scale, multi-tenant security. Support share-nothing; Support massive data parallel processing-mpp (massively Parallel processing). is not very similar to Greenplum. Host Assignment3 host, install centos6.2. Of course, you can prepare more than one server; This depends on the scenario (the GTM is a separate host; The exception is that each machine is best equipped with one coordinator and one

POSTGRES-XL Collective Construction

PGXL Cluster ConstructionA preparation1 Download Install decompression source/opt/Curl-o postgres-xl95r1beta1.tar.gzMV Postgres-xl95r1beta1.tar.gz POSTGRES-XL2 compiling$ yum-y gcc$ CD POSTGRES-XL$ pwd/opt/

Modify the password for the default user postgres of the PostgreSQL database

Sometimes, what if I forget the password of the default user Postgres when PostgreSQL is installed?Linux shell command input below: sudo-u postgres psql (so that you can directly login into the Postgres, and then in the inside can be added users, change passwords and so on, are not the problem!! )-------------------------------------------------------------------

Postgres CREATE TABLE as Select & CREATE TABLE like

1. Prepare Create a base table first: CREATE TABLE mytb1 (ID serial,name character varying,age integer);To create an index on the name field: Create INDEX Mytb1_name_index on MYTB1 (name); To view the MYTB1 table structure: postgres=# \d mytb1; Table "public.mytb1" Column | Type | Modifiers --------+-------------------+--------------------------------------------

Postgres too many connections Psql:FATAL:sorry, too many clients already

Today development found me, said their database connection is not up, may be too many connections, and then I log on to the server, and try to log into the database, is also an error:Psql:FATAL:sorry, too many clients alreadyIt is clear that the database connection is full. Then look at the database connection process:[Email protected] ~]$ Ps-ef |grep postgresPostgres 3406 18212 0 00:35? 00:01:00 postgres:denaliadmin region_na (51976) idlePostgres 4221 18212 0 01:09? 00:00:03 postgr

INITDB analysis of Postgres--from the failure of one plugin upgrade

Our company has developed a database product based on Postgres, needless to say we have changed the source code of OSS, and have also integrated and written some plugins. Therefore, when PostgreSQL and related plugins are upgraded, we also need to reflect the upgrade to our products, which is the background.This time the problem occurred when we upgraded PostgreSQL plugin ORAFCE (3.2.0-->3.6.0). As usual, we will upgrade the plugin, organize the sourc

Postgres Importing additional database data

Tags: But i row data GRE Postgre database data Start Menu selection logsA recent in-depth study of the Postgres database, importing data Tables from SQL Server databases used in the original project into postgres, Online Search postgres data import, in addition to the spatial database can be imported through PostGIS 2.0 shapefiles and DBF Loader exporter , No oth

Linux installation configuration postgres and use Dblink

Tags: dev dbn ini required pytho useradd configuration name LangLong time do not write things, have been looking at some open source things, the following paste on Linux installation configuration postgres and use Dblink operation reference for readers and their future reference: 1. Download Source: postgresql-9.3.2.tar.gz 2. Create Postgres cluster groups and users: Groupadd

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