The end-to-end solution for building and hosting better data apps, dashboards, and reports.
db = new QuestDatabaseClient("https://demo.questdb.io")
db
Plot.plot({
y: {
label: "↑ galon_price"
},
marks: [
Plot.ruleY([0]),
Plot.areaY(gas_prices, {x: "time", y1: "min", y2: "max", curve: "step", fill: "#ccc"}),
Plot.line(gas_prices, {x: "time", y: "avg", curve: "step"})
]
})
Plot.plot({
y: {
label: "↑ tempF"
},
marks: [
Plot.ruleY([0]),
Plot.areaY(weather, {x: "time", y1: "min", y2: "max", curve: "step", fill: "#ccc"}),
Plot.line(weather, {x: "time", y: "avg", curve: "step"})
]
})
db
Plot.plot({
y: {
label: "↑ Hourly trips (thousands)",
transform: d => d / 1000
},
marks: [
Plot.ruleY([0]),
Plot.line(trips, {x: "time", y: "count", curve: "step"})
]
})
db
class QuestDatabaseClient {
constructor(host) {
this.host = host;
}
async sql(strings, ...args) {
if (strings.length > 1) throw new Error("query parameters not supported");
return fetch(`${this.host}/exec?${new URLSearchParams({query: strings[0]})}`)
.then(response => response.json())
.then(formatResults);
}
}
async function exec(query) {
return fetch(`https://demo.questdb.io/exec?${new URLSearchParams({query})}`)
.then(response => response.json())
.then(formatResults);
}
function formatResults({error, columns, dataset}) {
if (error) throw new Error(error);
const rows = dataset.map(row => {
return Object.fromEntries(columns.map(({name, type}, i) => {
return [name, formatValue(row[i], type)];
}));
});
rows.columns = columns.map(({name}) => name);
return rows;
}
function formatValue(value, type) {
switch (type) {
case "TIMESTAMP": return new Date(value);
default: return value;
}
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.