create table users (id integer auto_increment primary key, name varchar(30), age integer);
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<script src="https://unpkg.com/d3@3/d3.min.js"></script>
<script src="https://unpkg.com/function-plot@1/dist/function-plot.js"></script>
<script>
functionPlot({
target: '#grid',
xAxis: {
label: 'real'
},
yAxis: {
label: 'imaginary'
},
grid: true,
data: [
{ fn: 'sqrt(1 - x * x)' },
{ fn: '-sqrt(1 - x * x)' }
]
})
</script>
</head>
<body>
</body>
</html>