\documentclass[10pt,a4paper]{article}

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\usepackage{multicol}           % Allows multicols in tables
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\usepackage{hhline}             % Border under tables
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\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{ecdk1234}
\pdfinfo{
  /Title (timescale.pdf)
  /Creator (Cheatography)
  /Author (ecdk1234)
  /Subject (TimeScale Cheat Sheet)
}

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\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
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% Header and Footer
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\fancyhead{} % Set header to blank
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\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{TimeScale Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{ecdk1234} via \textcolor{DarkBackground}{\uline{cheatography.com/60479/cs/22711/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}ecdk1234 \\
  \uline{cheatography.com/ecdk1234} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 7th May, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

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% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Hypertables}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Create Table- 2 steps} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}1. create a standard postgresql table  :} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`CREATE TABLE conditions (  time        TIMESTAMPTZ       NOT NULL,  location    TEXT              NOT NULL,  temperature DOUBLE PRECISION  NULL );`} \tn 
% Row Count 6 (+ 4)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}2. use create\_hypertable command} \tn 
% Row Count 7 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{create\_hypertable('conditions'}, 'time');`} \tn 
% Row Count 9 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Convert table {\bf{conditions}} to hypertable with just time partitioning on column {\bf{time}}} \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{create\_hypertable('conditions'}, 'time', chunk\_time\_interval =\textgreater{} INTERVAL '1 day');`} \tn 
% Row Count 13 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{create\_hypertable('conditions'}, 'time', 'location', 4, partitioning\_func =\textgreater{} 'location\_hash');`} \tn 
% Row Count 16 (+ 3)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{create\_hypertable('conditions'}, 'time', if\_not\_exists =\textgreater{} TRUE);`} \tn 
% Row Count 18 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Creat Index:CREATE INDEX ... WITH \seqsplit{(timescaledb.transaction\_per\_chunk}, ...);} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`CREATE INDEX ON conditions(time, device\_id) WITH \seqsplit{(timescaledb.transaction\_per\_chunk);`}} \tn 
% Row Count 22 (+ 4)
% Row 9
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{show\_chunks()} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{show\_chunks('conditions');`}} \tn 
% Row Count 24 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT show\_chunks(older\_than =\textgreater{} INTERVAL '3 months');`} \tn 
% Row Count 26 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Compression}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Use Alter table} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`ALTER TABLE \textless{}table\_name\textgreater{} SET (timescaledb.compress, \seqsplit{timescaledb.compress\_orderby} = '\textless{}column\_name\textgreater{} {[}ASC | DESC{]} {[} NULLS \{ FIRST | LAST \} {]} {[}, ...{]}', \seqsplit{timescaledb.compress\_segmentby} = '\textless{}column\_name\textgreater{} {[}, ...{]}' );`} \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`ALTER TABLE metrics SET (timescaledb.compress, \seqsplit{timescaledb.compress\_orderby} = 'time DESC', \seqsplit{timescaledb.compress\_segmentby} = 'device\_id');`} \tn 
% Row Count 9 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{\seqsplit{add\_compress\_chunks\_policy()}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{add\_compress\_chunks\_policy('conditions'}, INTERVAL '60d');`} \tn 
% Row Count 12 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Automation}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{add\_reorder\_policy()} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{add\_reorder\_policy('conditions'}, \seqsplit{'conditions\_device\_id\_time\_idx');`}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{alter\_job\_schedule()} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT \seqsplit{alter\_job\_schedule(job\_id}, schedule\_interval =\textgreater{} INTERVAL '5 minutes') FROM \seqsplit{timescaledb\_information.continuous\_aggregate\_stats} WHERE view\_name = \seqsplit{'conditions\_agg'::regclass;`}} \tn 
% Row Count 8 (+ 5)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}reschedules the continuous aggregate job for the conditions\_agg view so that it runs every five minutes.} \tn 
% Row Count 11 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Utilities}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Get information about hypertables} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT * FROM \seqsplit{timescaledb\_information.hypertable;`}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Get statistics about chunk compression} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT * FROM \seqsplit{timescaledb\_information.compressed\_chunk\_stats;`}} \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Get statistics about hypertable compression} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT * FROM \seqsplit{timescaledb\_information.compressed\_hypertable\_stats;`}} \tn 
% Row Count 9 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Get metadata and settings information for continuous aggregates} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT * FROM \seqsplit{timescaledb\_information.continuous\_aggregates;`}} \tn 
% Row Count 13 (+ 4)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Get information about background jobs and statistics related to continuous aggregates} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT * FROM \seqsplit{timescaledb\_information.continuous\_aggregate\_stats;`}} \tn 
% Row Count 17 (+ 4)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Get relation size of the chunks of an hypertable} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT chunk\_table, table\_size, index\_size, total\_size FROM \seqsplit{chunk\_relation\_size\_pretty('conditions');`}} \tn 
% Row Count 21 (+ 4)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Get approximate row count for hypertable(s) based on catalog estimates} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT * FROM \seqsplit{hypertable\_approximate\_row\_count('conditions');`}} \tn 
% Row Count 25 (+ 4)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Get relation size of hypertable} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`SELECT table\_size, index\_size, toast\_size, total\_size FROM \seqsplit{hypertable\_relation\_size\_pretty('conditions');`}} \tn 
% Row Count 29 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Continuous Aggregate}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Create View} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`CREATE VIEW \seqsplit{continuous\_aggregate\_view(} timec, minl, sumt, sumh ) WITH ( timescaledb.continuous,     timescaledb.refresh\_lag = '5 hours',     \seqsplit{timescaledb.refresh\_interval} = '1h' ) AS     SELECT time\_bucket('30day', timec), min(location), sum(temperature), sum(humidity)         FROM conditions         GROUP BY time\_bucket('30day', timec);`} \tn 
% Row Count 9 (+ 9)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Alter View} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`ALTER VIEW contagg\_view SET \seqsplit{(timescaledb.refresh\_lag} = '1h', \seqsplit{timescaledb.max\_interval\_per\_job} = '1 week', \seqsplit{timescaledb.refresh\_interval} = '30m');`} \tn 
% Row Count 14 (+ 5)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Refresh View} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`REFRESH MATERIALIZED VIEW contagg\_view;`} \tn 
% Row Count 16 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Drop View} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`DROP VIEW contagg\_view CASCADE;`} \tn 
% Row Count 18 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}