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PSQL Quick Reference Cheat Sheet, Cheat Sheet of Database Management Systems (DBMS)

Widener University - Chester Database Management Systems (DBMS)

Quick cheat sheet on PostgreSQL: free and open-source relational database management system

Typology: Cheat Sheet

2019/2020

Uploaded on 10/09/2020

mjforever
mjforever 🇺🇸

4.8

(25)

258 documents

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PSQLQuickReference
General
\copyright
showPostgreSQLusageanddistributionterms
\g[FILE]or;
executequery(andsendresultstofileor|pipe)
\h[NAME]
helponsyntaxofSQLcommands,*forallcommands
\q
quitpsql
QueryBuffer
\e[FILE]
editthequerybuffer(orfile)withexternaleditor
\ef[FUNCNAME]
editfunctiondefinitionwithexternaleditor
\p
showthecontentsofthequerybuffer
\r
reset(clear)thequerybuffer
\s[FILE]
displayhistoryorsaveittofile
\wFILE
writequerybuffertofile
Input/Output
\copy...
performSQLCOPYwithdatastreamtotheclient
host
\echo[STRING]
writestringtostandardoutput
\iFILE
executecommandsfromfile
\o[FILE]
sendallqueryresultstofileor|pipe
\qecho[STRING]
writestringtoqueryoutputstream(see\o)
Formatting
\a
togglebetweenunalignedandalignedoutputmode
\C[STRING]
settabletitle,orunsetifnone
\f[STRING]
showorsetfieldseparatorforunalignedqueryoutput
\H
toggleHTMLoutputmode
\psetNAME[VALUE]
settableoutputoption(NAME:={format|border
|expanded|fieldsep|footer|null|
numericlocale|recordsep|tuples_only|
title|tableattr|pager})
\t[on|off]
showonlyrows
\T[STRING]
setHTML<table>tagattributes,orunsetifnone
\x[on|off]
toggleexpandedoutput
Connection
\c[onnect][DBNAME|
USER|HOST|PORT|
]
connecttonewdatabase
\encoding[ENCODING]
showorsetclientencoding
\password[USERNAME]
securelychangethepasswordforauser
\conninfo
displayinformationaboutcurrentconnection
Variables
\prompt[TEXT]NAME
promptusertosetinternalvariable
\set[NAME[VALUE]]
setinternalvariable,orlistallifnoparameters
\unsetNAME
unset(delete)internalvariable
Informational
(options:S=showsystemobjects,+=additionaldetail)
\d[S+]
listtables,views,andsequences
\d[S+]NAME
describetable,view,sequence,orindex
\da[S][PATTERN]
listaggregates
\db[+][PATTERN]
listtablespaces
\dc[S][PATTERN]
listconversions
\dC[PATTERN]
listcasts
\dd[S][PATTERN]
showcommentsonobjects
\ddp[PATTERN]
listdefaultprivileges
\dD[S][PATTERN]
listdomains
\des[+][PATTERN]
listforeignservers
\deu[+][PATTERN]
listusermappings
\dew[+][PATTERN]
listforeigndatawrappers
\df[antw][S+][PATTERN]
list[onlyagg/normal/trigger/window]functions
\dF[+][PATTERN]
listtextsearchconfigurations
\dFd[+][PATTERN]
listtextsearchdictionaries
\dFp[+][PATTERN]
listtextsearchparsers
\dg[+][PATTERN]
listroles(groups)
\dFt[+][PATTERN]
listtextsearchtemplates
\di[S+][PATTERN]
listindexes
\dl
listlargeobjects,sameas\lo_list
\do[S][PATTERN]
listoperators
\dp[PATTERN]
listtable,view,andsequenceaccessprivileges
\dr[S+][PATTERN]
listforeigntables
\drds[PATTERN1[PATTERN2]]
listperdatabaserolesettings
\ds[S+][PATTERN]
listsequences
\dt[S+][PATTERN]
listtables
\dT[S+][PATTERN]
listdatatypes
\du[+][PATTERN]
listroles(users)
\dv[S+][PATTERN]
listviews
\dx[PATTERN]
listexternaltables
\l[+]
listalldatabases
\z[PATTERN]
sameas\dp
OperatingSystem
\cd[DIR]
changethecurrentworkingdirectory
\timing[on|off]
toggletimingofcommands
\![COMMAND]
executecommandinshellorstartinteractive
shell
LargeObjects
\lo_exportLOBOIDFILE
\lo_importFILE[COMMENT]
\lo_list
\lo_unlinkLOBOID
LargeObjectOperations
Rev.A01

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PSQL Quick Reference

General \copyright show PostgreSQL usage and distribution terms \g [FILE] or ; execute query (and send results to file or |pipe) \h [NAME] help on syntax of SQL commands, * for all commands \q quit psql

Query Buffer \e [FILE] edit the query buffer (or file) with external editor \ef [FUNCNAME] edit function definition with external editor \p show the contents of the query buffer \r reset (clear) the query buffer \s [FILE] display history or save it to file \w FILE write query buffer to file

Input/Output \copy ... perform SQL COPY with data stream to the client host \echo [STRING] write string to standard output \i FILE execute commands from file \o [FILE] send all query results to file or |pipe \qecho [STRING] write string to query output stream (see \o)

Formatting \a toggle between unaligned and aligned output mode \C [STRING] set table title, or unset if none \f [STRING] show or set field separator for unaligned query output \H toggle HTML output mode \pset NAME [VALUE] set table output option (NAME:= {format | border | expanded | fieldsep | footer | null | numericlocale | recordsep | tuples_only | title | tableattr | pager}) \t [on|off] show only rows \T [STRING] set HTML

tag attributes, or unset if none \x [on|off] toggle expanded output

Connection \c[onnect] [DBNAME | USER | HOST | PORT | ]

connect to new database

\encoding [ENCODING] show or set client encoding \password [USERNAME] securely change the password for a user \conninfo display information about current connection

Variables \prompt [TEXT] NAME prompt user to set internal variable \set [NAME [VALUE]] set internal variable, or list all if no parameters \unset NAME unset (delete) internal variable

Informational (options: S = show system objects, + = additional detail) \d[S+] list tables, views, and sequences \d[S+] NAME describe table, view, sequence, or index \da[S] [PATTERN] list aggregates \db[+] [PATTERN] list tablespaces \dc[S] [PATTERN] list conversions \dC [PATTERN] list casts \dd[S] [PATTERN] show comments on objects \ddp [PATTERN] list default privileges \dD[S] [PATTERN] list domains \des[+] [PATTERN] list foreign servers \deu[+] [PATTERN] list user mappings \dew[+] [PATTERN] list foreign data wrappers \df[antw][S+] [PATTERN] list [only agg/normal/trigger/window] functions \dF[+] [PATTERN] list text search configurations \dFd[+] [PATTERN] list text search dictionaries \dFp[+] [PATTERN] list text search parsers \dg[+] [PATTERN] list roles (groups) \dFt[+] [PATTERN] list text search templates \di[S+] [PATTERN] list indexes \dl list large objects, same as \lo_list \do[S] [PATTERN] list operators \dp [PATTERN] list table, view, and sequence access privileges \dr[S+] [PATTERN] list foreign tables \drds [PATTERN1 [PATTERN 2 ]]list per database role settings \ds[S+] [PATTERN] list sequences \dt[S+] [PATTERN] list tables \dT[S+] [PATTERN] list data types \du[+] [PATTERN] list roles (users) \dv[S+] [PATTERN] list views \dx [PATTERN] list external tables \l[+] list all databases \z [PATTERN] same as \dp

Operating System \cd [DIR] change the current working directory \timing [on|off] toggle timing of commands ! [COMMAND] execute command in shell or start interactive shell

Large Objects \lo_export LOBOID FILE \lo_import FILE [COMMENT] \lo_list \lo_unlink LOBOID

Large Object Operations

Rev. A