Hannie
- November 26, 2017
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Constraints in Postgresql
Constraints: ->Constraints are the rules enforced on data columns on table. -> These are used to prevent invalid data from being entered into the database. This ensures the accuracy and…
- November 24, 2017
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Extensions in Postgresql
-> Its helpful to collect all objects into a single package is called extension. Eg: If a new data type will require new functions,new operators and new index operator classes…
- November 22, 2017
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PostgreSQL Database Administration Commands
Version of PostgreSQL: cmd:select version(); Creating the user in the shell prompt: cmd:create user postgres_user; Creating the database in the shell prompt: cmd: /usr/local/pgsql/bin/createdb my_db -O postgres -p 5435; ->…
- November 22, 2017
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Create postgreSQL user account
-> After the installation of postgresql we need to create the user account for the postgresql. -> For this login as root and then execute the cmd below. cmd:adduser postgres…
- November 21, 2017
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Kill the sessions in postgresql
-> To get the active sessions use this query. cmd:select usename, pid, datname from pg_stat_activity; -> Now we can see the active sessions if we want to close all the…
- November 21, 2017
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Restore in postgresql
-> To restore the custom dump then we should always use pg_restore Syntax:instllation_location -Fc -d db_name port location_of_dump_file cmd: /usr/local/pgsql/bin/pg_restore -Fc -d sandbox_db -p 5435 /DB/sandbox_db_21_nov_17_custom -> To restore the…
- November 21, 2017
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Backup using pg_dump in Postgresql
To take the custom dump: Syntax: pgsql installation_directory type_of_dump database_name port location_of_file then use this cmd and then enter password for the user. cmd: /usr/local/pgsql/bin/pg_dump -Fc -d sandbox_db_nims -p 5435…
- November 21, 2017
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Update in Postgresql Configuration Files
-> After the set up is completed i.e. both installation and initdb the database is accessable from the local host alone. If we want to access the server from other…
- November 21, 2017
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Create and connect to the Postgresql Database through cmd
-> To create the databse go to installation directory of postgres and create the database as follows. cmd:/usr/local/pgsql/bin/createdb test1 -p 5432 -> To conncet to the database use the cmd…
- November 21, 2017
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Start,Stop and check the status of postgresql server
-> After the initilizing the data directory we need to start the server. Default port is 5432. To start the server: Go to the installation directory then give the data…