select sequence postgres

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

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

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

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.

Description ORA2PG: Oracle PostgreSQL Database Mode Converter is a free tool for Oracle Database migration to PostgreSQL compatibility mode. It connects to the Oracle database, scans it to automatically extract its structure or data, and generates

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

I. INTRODUCTION to psql is a PostgreSQL command line interactive client tool, similar to the command line tool sqlplus: 1 in Oracle allows you to interactively type SQL or commands, then they are sent to the PostgreSQL server, and then the SQL or

BackgroundPostgreSQL logical backup, refers to online backup database data, DDL output as SQL statements, data can be in the form of SQL statements or fixed separators (row format) output. The backup does not affect the DML operation of the Backup

Seven, Pg_dump: Pg_dump is a tool for backing up the PostgreSQL database. It can even make a full, consistent backup when the database is being used concurrently, without blocking access to the database by other users. The dump format generated by

             select extract (ISOYEAR  from fromdate_)  as year_,     --the year in which the week was made extract (WEEK FROM  fromdate_)  as week_,        --the year in which the week was made To_char (fromDate _ , ' YYYYMMDD ')