CartoDB-SQL-API/doc/query_optimizations.md

# Query Optimizations

There are some tricks to consider when using the SQL API that might make your application a little faster.

* Only request the fields you need. Selecting all columns will return a full version of your geometry in *the_geom*, as well as a reprojected version in *the_geom_webmercator*.
* Use PostGIS functions to simplify and filter out unneeded geometries when possible. One very handy function is, [ST_Simplify](http://www.postgis.org/docs/ST_Simplify.html).
* Remember to build indexes that will speed up some of your more common queries. For details, see [Creating Indexes](http://docs.cartodb.com/cartodb-editor/managing-your-data/#creating-indexes)
* Use *cartodb_id* to retrieve specific rows of your data, this is the unique key column added to every CartoDB table.

<!-- TODO: Link to http://blog.cartodb.com/post/53301057653/faster-data-updates-with-cartodb -->
applied some minor sql api clean-up and added batch api doc 2016-03-01 03:56:51 +08:00			`# Query Optimizations`
docs: split API.md in different files 2015-10-22 17:43:14 +08:00
			`There are some tricks to consider when using the SQL API that might make your application a little faster.`

applied some minor sql api clean-up and added batch api doc 2016-03-01 03:56:51 +08:00			`* Only request the fields you need. Selecting all columns will return a full version of your geometry in the_geom, as well as a reprojected version in the_geom_webmercator.`
docs: split API.md in different files 2015-10-22 17:43:14 +08:00			`* Use PostGIS functions to simplify and filter out unneeded geometries when possible. One very handy function is, [ST_Simplify](http://www.postgis.org/docs/ST_Simplify.html).`
Merge branch 'master' into newdocs 2015-11-10 22:38:54 +08:00			`* Remember to build indexes that will speed up some of your more common queries. For details, see [Creating Indexes](http://docs.cartodb.com/cartodb-editor/managing-your-data/#creating-indexes)`
docs: split API.md in different files 2015-10-22 17:43:14 +08:00			`* Use cartodb_id to retrieve specific rows of your data, this is the unique key column added to every CartoDB table.`

			`<!-- TODO: Link to http://blog.cartodb.com/post/53301057653/faster-data-updates-with-cartodb -->`