JIRA: how to find No. of QA Tested Issues during a day

[Siva R]

I searched everywhere online to find a solution for this issue and figured it out myself. 

Here is the JQL:( If you have a better solution..please post it here)

labels = YourLabel AND assignee was in (NamesOfQATeamMembers) AND status changed from (QA Statuses) to (Product Approval or Done Statuses}) after startOfDay()