JS SQL Query

A simple (read: toy) SQL implementation made from scratch in pure JS.

Examples

Basic SELECT from a Demo table.

FROM Test SELECT n,n2,n3 ⯈

Basic WHERE clause on a Demo table. SELECT defaults to SELECT *.

FROM Test WHERE n > 2 ⯈

Full CROSS JOIN on Demo tables.

FROM Test, Test ⯈

JOIN with predicate.

FROM Test AS a, Test AS b ON a.n < b.n ⯈

There are even some built-in table valued functions.

FROM RANGE(3,15, 2) ⯈

LOAD is also a table valued function to load data from an arbritrary url.

FROM LOAD('https://api.github.com/users/IJMacD/repos'), Owner ⯈

FROM LOAD('http://www.reddit.com/r/javascript.json'), data.children AS c, c.data AS d ⯈

FROM LOAD('https://dummy.restapiexample.com/api/v1/employees'), data ⯈

You can use expressions in table valued functions.

FROM RANGE(-7,0), LOAD('https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY&date=' || DATE(DATE_ADD(CURRENT_DATE(), value, DAY))) AS nasa WHERE media_type = 'image' SELECT nasa.* [⯈](https://ijmacd.github.io/query/#q=FROM%20RANGE(-7%2C0)%2C%20LOAD('https%3A%2F%2Fapi.nasa.gov%2Fplanetary%2Fapod%3Fapi_key%3DDEMO_KEY%26date%3D'%20%7C%7C%20DATE(DATE_ADD(CURRENT_DATE()%2C%20value%2C%20DAY)))%20AS%20nasa%20WHERE%20media_type%20%3D%20'image'%20SELECT%20nasa.*)

Going deeper...

FROM (FROM LOAD('https://xkcd.com/info.0.json') SELECT num), RANGE(num,num - 10), LOAD('https://xkcd.com/'||value||'/info.0.json') (won't work in browser due to XKCD CORS issues but works on server)

CTEs are supported.

WITH cte AS (FROM Test_2 WHERE c > 'd') FROM Test, cte ON CHAR(n+97) = c ⯈

As are window functions.

FROM Test SELECT n, n2, RANK() OVER(ORDER BY n2) ⯈

FROM Test SELECT n, SUM(n) OVER(PARTITION BY n2) ⯈

FROM Test SELECT n, SUM(n) OVER(ORDER BY n ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) ⯈

Check out the tests for more examples of supported features.