PostgreSQL

0. Help$/home/lhl/az/pg/bin/pg_ctl--Helppg_ctl is a utility to initialize, start, stop, or control a PostgreSQL server. Usage:pg_ctl INIT[DB] [-D DataDir] [-S] [-O"OPTIONS"] Pg_ctl start [-W] [-t SECS] [-D datadir] [-S] [-l FILENAME] [-O"OPTIONS"]

Installing PostgreSQLWhether the master-slave must be divided into two machines, master and slave should be the same version, or start will error.3. Configure the master databaseSu–postgres/usr/local/pgsql/bin/pg_ctl–d/data/pgsql9.1 Start

Gets the maximum value of the self-increment ID in the every_check_accident tableSELECT Last_value from Every_check_accident_id_seq;$list = Db::getinstance (self::D bname)->pg_insert_id (' every_check_accident ', ' id ');View the version of

This article may be wrong, has not been carefully studiedError running \d:No relations found.\d只显示可见的表，也就是该数据库的schema在search_path中。SHOW Search_path;If not, set it up:SET Search_path= Tran;Where Tran is the schema to query.If \d still goes wrong,

First, installation1, Installation: Use the following command, will automatically install the latest version, here is 9.5sudo Install PostgreSQLWhen the installation is complete, a default database account named "Postgres" with no password is

So far we've explained how to add data to a table and how to change it. The rest is to discuss how to delete data that is no longer needed. As with previous additions, deleting data must be deleted from the entire row in the table. In the previous

A new table created with inherits inherits one or more parent tables, the child table inherits only the table structure of the parent table and the not null,default,check three constraints, the primary key, the foreign key and the unique key, and

When PostgreSQL adds a new server connection, an error occurs:Workaround:First step: Modify the list of servers connected in the configuration file and add the server IP address (figure Pg002.png)Profile Address: Database Right-click Properties,

1. Installing FILE_FDWNeed to install FILE_FDW, usually into the PostgreSQL source package in the CONTRIB/FILE_FDW directory, execute:makemake installThen go into the database and execute the following SQL to install the FILE_FDW:CREATE EXTENSION

http://my.oschina.net/hippora/blog/375292 Download Source and unzip[root@fnddb ~]# wget https://ftp.postgresql.org/pub/source/v9.4.0/postgresql-9.4.0.tar.bz2[root@fnddb ~]# tar -xjvf postgresql-9.4.0.tar.bz2 [root@fnddb ~]# cd postgresql-9.4.0Start

The project needs to use Gisgraphy, Zennai gisgraphy3.0 only supports postgis1.5. So you can only install the Posgresql and PostGIS of the old version number. From the support matrix diagram of PostGIS, you can see the PostgreSQL supported by the

PostgreSQL Monitor Pg_viewHttps://github.com/zalando/pg_viewRequirementsLinux 2.6, Python 2.6, psycopg2, cursesSee if the system has curses[Email protected]/]# ls/usr/include/ncurses*/usr/include/ncurses_dll.h/usr/include/ncurses.hThe system already

Query for locks that exist in the tableSelect A.locktype,a.database,a.pid,a.mode,a.relation,b.relnameFrom Pg_locks AJoin Pg_class b on a.relation = B.oidwhere upper (b.relname) = ' table_name ';The above is an SQL statement that queries for locks on

Original link:How Linux sets PostgreSQL remote accessAfter the PostgreSQL database is installed, the default is to accept only local access connections. If you want to access the PostgreSQL database server on a different host, you need to configure

Continue to record the learning process Europe ~ ~Yesterday accidentally made Springmvc MyBatis PostgreSQL code to delete, hey ~ want to undo, results do not allowBut Sey Park is not blessed to lose his horse.Once again today, it's time to

The database used by the company PostgreSQL, has been running smoothly, but the recent Java new management platform, due to more users, concurrency is relatively large. In addition the new system may also have problems with optimization, so PG often

function version (), without parameters, as an example is concise and straightforward. If you need parameters, you can look at other function definitions under ADT, which is a very simple thing, which is the knowledge storehouse that open source

Export the database data1 to a file in the shell with Command pg_dumppg_dump-d data1-f Test.txtOrpg_dump-d data1 > Test.sqlAnd then create an empty libraryCreatedb data2Import data1 data into data2 with the Psql commandpsql-d data2-D data2 Pg_dump

highgo=# Create sequence T_seq increment by 1 start with 1;   CREATE sequencehighgo=# Select Nextval (' T_seq '); --View the next value in the sequence Nextval---------1 (1 rows of records) highgo= #create table t (id int default nextval (' T_seq ')

3.2 Archiving transaction logsAfter looking at the pictures, we can look at how to get these things into working condition. When it comes to filing in a timely manner, the first thing you need to do is archive xlog. PostgreSQL provides all of the