SQL：如何删除也在另一个 table 中的行？

Question

假设我有两张桌子。例如，

Table 1:

Store Product 
 1       2    
 1       1
 2       3
 2       4

和Table 2

Store Product 
 1       2    
 2       3

如何删除 Table 1 中也在 Table 2 中的所有行？

因此，新的 Table 1 将是：

Store Product 
 1       1
 2       4

Answer 1

你似乎想要 :

select t1.*
from table1 t1
where not exists (select 1 
                  from table2 t2
                  where t2.store = t.store and 
                        t2.product = t1.product
                 );

同样删除版本为：

delete 
from table1 t1
where exists (select 1 
              from table2 t2 
              where t2.store = t.store and 
                    t2.product = t1.product
             );

Answer 2

你可以这样使用：

DELETE
    t1
FROM
    table1 t1
WHERE
    (t1.store, t1.product) IN ( SELECT 
                                     t2.store, 
                                     t2.product 
                                from 
                                    table2 t2);

SQL：如何删除也在另一个 table 中的行？

SQL: How do I delete rows that are also in another table?

sql

anti-join

teradata