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postgres_cheatsheet.md

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best practice: linux

vi ~/.pgpass :5432::username:password chmod 0600 ~/.pgpass

best practice: windows

edit %APPDATA%\postgresql\pgpass.conf :5432::username:password

linux

PGPASSWORD="password" pg_dump --no-owner -h host -p port -U username database > file.sql

windows

PGPASSWORD=password&& pg_dump --no-owner -h host -p port -U username database > file.sql

alternative

pg_dump --no-owner --dbname=postgresql://username:password@host:port/database > file.sql

restore

psql --set ON_ERROR_STOP=on -U postgres -d database -1 -f file.sql pg_restore --no-privileges --no-owner -U postgres -d database --clean file.sql # only works for special dumps

backup exluding table

pg_dump --no-owner -h 127.0.0.1 -p 5432 -U username --exclude-table=foo database > tmp.sql

backup including table

pg_dump --no-owner -h 127.0.0.1 -p 5432 -U username --table=foo database > tmp.sql

backup and restore

psql -U username dbname < dbexport.pgsql PGPASSWORD=password && pg_dump --no-owner -h 127.0.0.1 -p 5432 -U username database > tmp.sql psql -U postgres -d database -c "drop schema public cascade; create schema public;" psql --set ON_ERROR_STOP=on -U postgres -d database -1 -f tmp.sql rm tmp.sql

index all id's

CREATE INDEX ON cities (id_city);

if you need to remove unintentionally backuped owners afterwards

sed -i.bak '/OWNER TO specialowner/d' input.sql

\COPY ( id_reference, who, address, city, state, zip, country, neighborhood, common, scientific, lng, lat,
dbh, height, health, owner, url, urlimage, planting_opt1, planting_opt1_com, planting_opt2, planting_opt3, side_type, location_tree_count, email ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25) FROM '/Users/aa/Desktop/APPS/wtt/wtt_server/server/db/Alameda_street_trees_clean_min.csv' DELIMETER ',' WITH HEADER TRUE

 \COPY treedata FROM '/Users/aa/Desktop/APPS/wtt/wtt_server/server/db/Alameda_street_trees_clean_min.csv' DELIMITER ',' CSV HEADER;

\COPY treedata [ ( column_name [, ...] ) ] FROM { 'filename' | STDIN } [ [ WITH ] ( option [, ...] ) ]

COPY { table_name [ ( column_name [, ...] ) ] | ( query ) } TO { 'filename' | STDOUT } [ [ WITH ] ( option [, ...] ) ]

where option can be one of:

FORMAT format_name
OIDS [ boolean ]
DELIMITER 'delimiter_character'
NULL 'null_string'
HEADER [ boolean ]
QUOTE 'quote_character'
ESCAPE 'escape_character'
FORCE_QUOTE { ( column_name [, ...] ) | * }
FORCE_NOT_NULL ( column_name [, ...] )
ENCODING 'encoding_name'

Add foreign key to existing table

ALTER TABLE cities ADD UNIQUE (city); CREATE INDEX ON cities (city);

\d+ cities "cities_city_idx" btree (city) "cities_id_city_idx" btree (id_city)

ALTER TABLE cities ADD CONSTRAINT city UNIQUE USING INDEX cities_id_city_idx; ALTER TABLE cities ADD FOREIGN KEY (city) REFERENCES treedata(city) ON UPDATE CASCADE ON DELETE CASCADE