CloudKit - 如何執行不存在查詢？

Question

我要像SQL執行CloudKit數據庫查詢：

SELECT * 
FROM table1 t1 
WHERE NOT EXISTS 
    (SELECT * 
    FROM table2 t2 
    WHERE t1.userid = t2.userid) 

你知道該怎麼做？

Answer 1

嘗試 SELECT * FROM 表1 T1 WHERE t1.userid NOT IN（SELECT t2.userid FROM表2 T2）;

或

SELECT t1.userid FROM表1 T1 MINUS SELECT t2.userid FROM表2 T2;