I have some questions about this snippet of code:
FROM Common.XmlArrayOfInt(@ListingIDs) IDs
Is XmlArrayOfInt a built-in TSQL function? If so, how does it work and what does it do both generally and in this instance? I have some experience (~1.5-years) with db-programming, but I currently don't know XML nor have I ever seen XML used within sql-server queries. Please explain as much as possible.