如何删除plsql中的某些行

Question

我对两个表有以下问题：

table1有

• UID
• 名称

table2有

• ID
• 名称

我想编写一个sql脚本，删除table1中不符合条件的所有行

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);