sql - How to delete certain rows in plsql

Question

I have the following problem with two tables:

table1 has

• uid
• name

table2 has

• id
• name

I want to write a sql script that deletes all rows from table1 which don't meet the condition

table1.uid = table2.id

Answer 1

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

或者

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);