Below are my actual notes from the training:
- Sitecore Query allows you to interrogate an XML representation of the Sitecore tree
- Primarily used to limit field selection via the field’s source
- Sitecore Query and Sitecore Search are DIFFERENT
- Sitecore Query is not intended for complex filtering or for returning a large number of results
- Sitecore Query is best used in the context of a field’s source (such as multi-list, droplink, or checklist fields), or when you are dealing with a small set of items
- You can use Sitecore Query in the API
- Any complex searching should always be done with Sitecore Search
- Sitecore Query, if used incorrectly, is a common culprit for serious performance issues
- Sitecore Query is similar to XPath. It is primarily used to limit field selection in the field’s source
- The XPath builder lets you test your queries quickly
- Sitecore seems to have made the XPath builder tricky to navigate to, but I find the easiest way to launch is with commandy (CTRL+SHIFT+SPACE)
- Expression example: /sitecore/content/Home//*[@#Main Heading# = ‘Spot’]
- In some locations you'll need to append 'query:' in front of the query itself
- The hashes explicitly state that there are spaces
- There are relative and explicit queries
Hope that helps!
Marcel
