{"Entry":{"collection":"psql","key":"cmd-3f","name":"\\?","aliases":["\\?"],"metadata":{"aliases":["\\?"],"category":"Scripting and assistance","content_hash":"458299ca90b7c1de8fbd980f00f738955e1f1ba713da4f4d45be17544930ebc6","imported_at":"2026-09-30T00:40:44.691894+08:00","name":"\\?","name_zh":"","slug":"cmd-3f","summary":"Shows help information. The optional topic parameter (defaulting to commands ) selects which part of psql is explained: commands describes psql 's backslash commands; options describes the command-line options that can be passed to psql ; and variables shows help about psql configuration variables."}},"Definition":{"Collection":"psql","Key":"cmd-3f","SourceDatabase":"center","Version":"18","SourceTable":"psql_command","SourceKey":"cmd-3f","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","Facts":{"command":"\\?","comparison_data":{"definition":"Shows help information. The optional topic parameter (defaulting to commands ) selects which part of psql is explained: commands describes psql 's backslash commands; options describes the command-line options that can be passed to psql ; and variables shows help about psql configuration variables.","modifiers":[],"signature":"\\? [ topic ]","spellings":["\\?"]},"comparison_hash":"873ec7d776660db8165d5edad7b3235b3dd96f023f77a4b53d4aa2e9a3f955e1","description":["Shows help information. The optional topic parameter (defaulting to commands ) selects which part of psql is explained: commands describes psql 's backslash commands; options describes the command-line options that can be passed to psql ; and variables shows help about psql configuration variables."],"facts":[{"label":"Client","value":"psql 18.6"},{"label":"Case-sensitive spelling","value":"\\?"}],"manual_html":"\u003cdiv\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt id=\"APP-PSQL-META-COMMAND-QUESTION-MARK\"\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003e\\? [ \u003cem class=\"replaceable\"\u003e\u003ccode\u003etopic\u003c/code\u003e\u003c/em\u003e ]\u003c/code\u003e\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\n\u003cp\u003eShows help information. The optional \u003cem class=\"replaceable\"\u003e\u003ccode\u003etopic\u003c/code\u003e\u003c/em\u003e parameter (defaulting to \u003ccode class=\"literal\"\u003ecommands\u003c/code\u003e) selects which part of \u003cspan class=\"application\"\u003epsql\u003c/span\u003e is explained: \u003ccode class=\"literal\"\u003ecommands\u003c/code\u003e describes \u003cspan class=\"application\"\u003epsql\u003c/span\u003e's backslash commands; \u003ccode class=\"literal\"\u003eoptions\u003c/code\u003e describes the command-line options that can be passed to \u003cspan class=\"application\"\u003epsql\u003c/span\u003e; and \u003ccode class=\"literal\"\u003evariables\u003c/code\u003e shows help about \u003cspan class=\"application\"\u003epsql\u003c/span\u003e configuration variables.\u003c/p\u003e\n\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","manual_path":"app-psql.html#APP-PSQL-META-COMMAND-QUESTION-MARK","modifiers":[],"related":[{"label":"psql command-line options and complete manual","url":"/wiki/tool/psql/?v=18"}],"release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[],"signature":"\\? [ topic ]","sources":[{"anchor":"APP-PSQL-META-COMMAND-QUESTION-MARK","file":"app-psql.html","label":"18.6 English manual · app-psql.html","sha256":"fa2a1d39294b8854318e82e93f71272c645ed88150ecc2786c28902c3f32782c","url":"/docs/18/app-psql.html#APP-PSQL-META-COMMAND-QUESTION-MARK"}],"spellings":["\\?"],"tables":[{"columns":[{"key":"command","label":"Command"},{"key":"modifiers","label":"Documented suffix modifiers"}],"key":"spellings","rows":[{"command":{"text":"\\?","url":"/wiki/psql/cmd-3f/?v=18"},"modifiers":"None listed in this signature"}],"title":"Spellings in this manual definition"}]},"ManualEvidence":{"manual_path":"app-psql.html#APP-PSQL-META-COMMAND-QUESTION-MARK","release":{"channel":"stable","evidence_kind":"English manual and source declarations","label":"18.6","major":"18","manifest":{"index":"index.html","major":"18","pages":1148,"pdf":{"A4":{"built_at":"2026-09-26","bytes":15865106,"pages":3154,"sha256":"19512c405da53f9f7fcf0abba359223aa65f021be025bf3411381918f92e3190","url":"/files/documentation/pdf/18/postgresql-18-A4.pdf"},"US":{"built_at":"2026-09-26","bytes":15748059,"pages":3328,"sha256":"facbe6c229e598b872d3d98bef53308f46e06746006fa4590de9a7de9dd46319","url":"/files/documentation/pdf/18/postgresql-18-US.pdf"}},"release":"18.6","source_mode":"en SGML built with pinned official archive","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","source_url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","svg_assets":3,"tree":"18"},"ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","source_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"anchor":"APP-PSQL-META-COMMAND-QUESTION-MARK","file":"app-psql.html","label":"18.6 English manual · app-psql.html","sha256":"fa2a1d39294b8854318e82e93f71272c645ed88150ecc2786c28902c3f32782c","url":"/docs/18/app-psql.html#APP-PSQL-META-COMMAND-QUESTION-MARK"}]},"MeasuredEvidence":{}},"Text":{"Collection":"psql","Key":"cmd-3f","SourceDatabase":"center","Version":"18","Locale":"en","Title":"\\?","Summary":"Shows help information. The optional topic parameter (defaulting to commands ) selects which part of psql is explained: commands describes psql 's backslash commands; options describes the command-line options that can be passed to psql ; and variables shows help about psql configuration variables.","BodyHTML":"\u003cdiv\u003e\u003cdl\u003e\u003cdt id=\"APP-PSQL-META-COMMAND-QUESTION-MARK\"\u003e\u003cspan\u003e\u003ccode\u003e\\? [ \u003cem\u003e\u003ccode\u003etopic\u003c/code\u003e\u003c/em\u003e ]\u003c/code\u003e\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\n\u003cp\u003eShows help information. The optional \u003cem\u003e\u003ccode\u003etopic\u003c/code\u003e\u003c/em\u003e parameter (defaulting to \u003ccode\u003ecommands\u003c/code\u003e) selects which part of \u003cspan\u003epsql\u003c/span\u003e is explained: \u003ccode\u003ecommands\u003c/code\u003e describes \u003cspan\u003epsql\u003c/span\u003e\u0026#39;s backslash commands; \u003ccode\u003eoptions\u003c/code\u003e describes the command-line options that can be passed to \u003cspan\u003epsql\u003c/span\u003e; and \u003ccode\u003evariables\u003c/code\u003e shows help about \u003cspan\u003epsql\u003c/span\u003e configuration variables.\u003c/p\u003e\n\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","SourceRevision":"ee8d1a3612338fd9adf250730cb640fcc5233b5491337cc00a316a44e3a0b9f8","ContentHash":"f1f1fb8febc2f431dbc67912c973ec6b31830a3899a488c618486c3635951774","Payload":{"description":["Shows help information. The optional topic parameter (defaulting to commands ) selects which part of psql is explained: commands describes psql 's backslash commands; options describes the command-line options that can be passed to psql ; and variables shows help about psql configuration variables."],"manual_html":"\u003cdiv\u003e\u003cdl class=\"variablelist\"\u003e\u003cdt id=\"APP-PSQL-META-COMMAND-QUESTION-MARK\"\u003e\u003cspan class=\"term\"\u003e\u003ccode class=\"literal\"\u003e\\? [ \u003cem class=\"replaceable\"\u003e\u003ccode\u003etopic\u003c/code\u003e\u003c/em\u003e ]\u003c/code\u003e\u003c/span\u003e \u003c/dt\u003e\u003cdd\u003e\n\u003cp\u003eShows help information. The optional \u003cem class=\"replaceable\"\u003e\u003ccode\u003etopic\u003c/code\u003e\u003c/em\u003e parameter (defaulting to \u003ccode class=\"literal\"\u003ecommands\u003c/code\u003e) selects which part of \u003cspan class=\"application\"\u003epsql\u003c/span\u003e is explained: \u003ccode class=\"literal\"\u003ecommands\u003c/code\u003e describes \u003cspan class=\"application\"\u003epsql\u003c/span\u003e's backslash commands; \u003ccode class=\"literal\"\u003eoptions\u003c/code\u003e describes the command-line options that can be passed to \u003cspan class=\"application\"\u003epsql\u003c/span\u003e; and \u003ccode class=\"literal\"\u003evariables\u003c/code\u003e shows help about \u003cspan class=\"application\"\u003epsql\u003c/span\u003e configuration variables.\u003c/p\u003e\n\u003c/dd\u003e\u003c/dl\u003e\u003c/div\u003e","related":[{"label":"psql command-line options and complete manual","url":"/wiki/tool/psql/?v=18"}],"sections":[],"tables":[{"columns":[{"key":"command","label":"Command"},{"key":"modifiers","label":"Documented suffix modifiers"}],"key":"spellings","rows":[{"command":{"text":"\\?","url":"/wiki/psql/cmd-3f/?v=18"},"modifiers":"None listed in this signature"}],"title":"Spellings in this manual definition"}]}},"RequestedLocale":"zh-Hans","Fallback":true,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":[{"Version":"18","Ordinal":0,"Command":"\\?","Signature":"\\? [ topic ]","Modifiers":[]}],"SQLState":null,"Evidence":null}