netezza postgres

Postgresql has many built-in practical functions. The following describes the grouping and cutting functions.Environment: PostgreSQL 9.1.2CentOS 5.7 finalI. Composite Functions1. concatA. Introduction concat(str "any" [, str "any" [, ...]])Concatenate all but first arguments with separators.The first parameter is used as a separator. NULL arguments are ignored.B. Actual Example: postgres=# create table t_kenyon(id int,name varchar(10),remark text);CRE

Tags: linu new script power on right L database Postgre chown Pre1.1 Installing Postgresql9.21) installation DependenciesInstalling readline-devel.x86_64 0:6.0-4.el6 and ncurses-devel.x86_64 0:5.7-3.20090208.el6RPM-IVH ncurses-devel-5.7-3.20090208.el6.x86_64.rpmRPM-IVH readline-devel-6.0-4.el6.x86_64.rpm2) Create a directoryMkdir/usr/local/hly3) uploading postgresql-9.2.24.tar.gz to the server/usr/local/hly directory/usr/local/hly/postgresql-9.2.24.tar.gz4) unzip the filecd/usr/local/hly

]$./psql-n dbname-u Usrnamestay81=# Select COUNT (*) from table1;Count-------5986(1 row)2. Exit, exit after use, or the connection has been suspended.stay81=# \q3.postgres data export.[Postgres@test bin]$./pg_dump-u postgres-t testtable-d TestDB > Testtable.dumpor [Postgres@test bin]$./pg_dump-u

Environment: Win7 SP1pg:9.3.5 1, create user postgres, password is also postgres: NET user Postgres Postgres/add2. Set up the data directory under the database root directory:C:\Program FILES\POSTGRESQL\9.3>MD Data3. Remove administrator permissions to the data directory:C:\Program files\postgresql\9.3>cacls data/e/t/r

return, indicating that the data is loaded in this directory)————————————————————————— Provide a password for the database Superuser (postgres). A locked Unix user account (Postgres) is created if not present. 5. Password: [Enter password] 6. Retype password: [repeat input] —————————————————————————7. Please select the port number of the server should listen on. Port [5432]:[default port, direct return] [6

original unmodified state, undo should be delete table1 where c1 = 100;Insert INTO table1 (200); Undo should be the delete table1 where c1 = 200;Update table1 Set C1 = C1 = 200; Undo:update table1 Set C1 = where C1 = 300RollbackWhy do I have undo log, or what does undo log solve? In fact, this question is not good, because undo is designed, there is no direct factor that must have the undo log, their more familiar with the Postgres there is no undo l

Label: Nanyi Date: December 22, 2013 Since MySQL was acquired by Oracle, PostgreSQL has become the first choice for open-source relational databases. This article describes the installation and basic usage of PostgreSQL for first-time users to get started. The following is based on the Debian operating system, and the rest of the operating system is not in the balance, but most of the content should apply. First, installation First, install the PostgreSQL client. sud

. DescriptionStorage_parameter is a storage parameter, such as a fill factor (fillfactor). tablespace can specify a tablespace. The key is the subsequent as query with [no] data, which is described in the following example.Iii. Example1. Create a basic table[S @ primary ~] $ Psqlpsql (9.3.0) Type "help" for help. postgres = # create table test_kenyon (id int, vname text); CREATE TABLEpostgres = # insert into test_kenyon select generate_series (), 'ken

/local/pgpool -- with-pgsql = path -- with-pgsql =/usr/local/pgsqlMakeMake installChown postgres. postgres/usr/local/pgpool/-RChown postgres. postgres/usr/src/pgpool-II-3-RMkdir/var/run/pgpoolChown postgres. postgres/var/run/pgpoo

--xlogdir=c:\data_base_logD: Database Storage folder,--locale=c,encoding: Encoding, XLOGIDR: log;6, port and number of connections settingsDatabase files directory under Postgresql.conf file: port,max_connections;7, コアファイル output first setSymfoware Serverが often finally beauty field of the survey of the report of the occupies えて, コアファイルの output first specify します.Postgresql.confのcore_directory, core_contentsパラメタで designation します;8. SYMF Server Startup1) "Post