如何PLSQL

Question

刪除某些行我有兩個表如下問題：

表1有

• UID
• 名

表2具有

• ID
• 名

我想編寫SQL腳本，刪除從表1中的所有行不符合條件

table1.uid = table2.id 

Answer 1

delete from table1 t1 
where not exists (select 1 from table2 where id = t1.uid) 

OR

delete from table1 
where uid not in (select id from table2) 

Answer 2

DELETE FROM table1 
WHERE NOT EXISTS 
(select table2.name 
    from table2 
    where table1.uid = table2.id);