Power Query is a data transformation and data preparation engine. Power Query comes with a graphical interface for getting data from sources and a Power Query editor for applying transformations. Because the engine is available in many products and services, the destination where the data is stored depends on where Power Query is used. Using Power Query, you can perform the extract, transform ...
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The HTTP Cache-Control header holds directives (instructions) in both requests and responses that control caching in browsers and shared caches (e.g., Proxies, CDNs).
62 Under certain circumstances, IE6 will still cache files even when Cache-Control: no-cache is in the response headers. The W3C states of no-cache: If the no-cache directive does not specify a field-name, then a cache MUST NOT use the response to satisfy a subsequent request without successful revalidation with the origin server.
Cache directive "no-cache" An explaination of the HTTP Cache-Control header The Cache-Control header is used to specify directives for caching mechanisms in both HTTP requests and responses. A typical header looks like this Cache-Control: public, max-age=10 public Indicates that the response may be cached by any cache. private