Commands to make a tiny SQLite database file of the data.

create-earthquake-sqlite.sh

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+#!/bin/bash
+
+function csv2insert { perl -plE 's,\cM,,;s,\x27,$&$&,g;$_="insert into quake values (".s/"(.*?)"/push@a,$1;"§§$#a"/egr=~s,(^|$),\x27,gr=~s/,/\x27,\x27/gr=~s/§§(\d+)/$a[$1]/gr.");"'; }
+
+c=cat
+if hash pv; then
+  c=pv
+fi
+
+if [ ! -f earthquake.csv ]; then 
+    wget -N https://raw.githubusercontent.com/socratica/data/master/earthquake.csv
+fi
+
+cat earthquake.csv | tail -n+2 | csv2insert            > earthquake-insert.sql
+perl -i -ple '$.-1or$_="BEGIN;\n$_";$_.="\nEND;" if eof' earthquake-insert.sql
+
+
+cat earthquake-create.sql | sqlite3 earthquake.sqlite
+$c  earthquake-insert.sql | sqlite3 earthquake.sqlite
+ls -l earthquake.sqlite
+
+echo "select 'earthquakes', sum(1) from quake;" | sqlite3 earthquake.sqlite

earthquake-create.sql

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+drop table if exists quake;
+
+create table quake (
+  earthquake_id       integer,
+  occurred_on         timestamp,
+  latitude            real,
+  longitude           real,
+  depth               real,
+  magnitude           real,
+  calculation_method  varchar(128),
+  network_id          varchar(128),
+  place               varchar(500),
+  cause               varchar(128),
+  CONSTRAINT earthquake_pkey PRIMARY KEY (earthquake_id)
+);
+
+create index i_quake_latitude on quake(latitude);
+create index i_quake_longitude on quake(longitude);
+create index i_quake_occurred_on on quake(occurred_on);
+create index i_quake_magnitude on quake(magnitude);

earthquake-report.sql

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+
+with q as (select *,substr(occurred_on,1,4) year from quake)
+select year, cause, sum(1) from q group by year, cause order by 1,2;
+
+select * from quake where magnitude >= 8.0
+order by magnitude, occurred_on;
+
+select substr(occurred_on,1,4) year, sum(1)
+from quake
+where magnitude >= 7.5
+group by substr(occurred_on,1,4)
+order by 1;
+