[13:13:31] <Hoi>	 I am using Quarry to count the number of files in a category on Commons. I just notice that some files in a category are not listed in the `categorylinks`tables. 
[13:14:53] <Hoi>	 For example, the file [[c:File:NLC892-412000013024-135929 順治潞安府志 第3冊.pdf]] is indeed categorized as [[Category:Digitized Ancient Books in the National Library of China]]. But it is not shown in https://quarry.wmcloud.org/query/66933 .
[13:15:25] <Hoi>	 Could anyone help me find where the problem resides?
[19:00:31] <Krinkle>	 Hoi: strange, it appears no entries exist for that page ID, which rules out potential encoding issues with the title. e.g. `select * from categorylinks where cl_from = 124149972 LIMIT 10;`