AEM DAM Touch UI provides Bulk metadata editor for such operations. You can apply tags to multiple assets in one step. For more details see this documentation - https://docs.adobe.com/docs/en/aem/6-1/author/assets/managing-assets-touch-ui/managing-multiple-assets.html

I posted following answer to the same question in another thread- http://help-forums.adobe.com/content/adobeforums/en/experience-manager-forum/adobe-experience-manager.topic.html/forum__maz2-hi_is_there.html#forum__maz2-hi_is_there__rtyj-i_dont_knowwhetherI don't know whether there is any OOTB confi...

As per the following documentation https://www.day.com/maven/jsr170/javadocs/jcr-2.0/javax/jcr/security/Privilege.html#JCR_ALL, the jcr:All aggregates the following privileges- jcr:readjcr:writejcr:readAccessControljcr:modifyAccessControljcr:lockManagementjcr:versionManagementjcr:nodeTypeManagementj...

Since you have too many nodes being returned in the resultset,  is it good to consider limiting the results ? Or else, Instead of running the query on root node why not run it on subpaths separately for limiting the results. http://help-forums.adobe.com/content/adobeforums/en/experience-manager-foru...

You should bind your servlet with a resourceType and use that resource type in a custom page component and a template. You can then create a page with that template and define permissions or ACLs on the page node for defining the access control. Whenever you hit the URL of the page the AEM will call...

I think it will work as the reporting query framework does post processing/filtering on the result set returned by just doing a simple query rather than adding the predicate conditions to the query itself for filtering. You can check the out of the box page audit report for checking the performance ...

Why don't you use the component report for this use case ?You can customize this report to show only the page activation date which be added as a new column and may be show page path instead of the page link.  http://localhost:4502/etc/reports/compreport.htmlhttp://localhost:4502/crx/de/libs/cq/repo...

If you want to try this with SQL 2 then the following query should work- SELECT * FROM [cq:PageContent] AS parent INNER JOIN [nt:unstructured] AS child ON ISDESCENDANTNODE(child,parent) WHERE ISDESCENDANTNODE(parent,[FROM_WHICH_CONTENT_PATH]) AND child.[sling:resourceType]='COMPONENTPATH' AND parent...

What version of AEM you are working on ? From 5.6.1, the variable for workItem is called as "graniteWorkItem". Check the following section "Implementing a Process Step with an ECMA Script" in the documentation link [1].  [1] https://docs.adobe.com/docs/en/cq/5-6-1/workflows/wf-extending.html