我不擅長sql 語句，今天學習到了從兩個表中將外鍵和id一致，且字段version是最大的數據拼接到一起
select * from (SELECT * FROM sysstructure) as T1
join (SELECT * From sysweight) as T2
on T1.id=T2.PK_sysStructureID
AND T2.version=(select MAX(version) from sysweight)
weka是通過sql調用數據封裝成Instances，用這種拼接方式的變化，可以憑藉出我想要的其他數據
