Question

我需要表t1和t2。我想

删除t1中的记录，其中

t1.c1 = t2.c1 AND t1.c2 = t2.c2 AND t1.c3 = t2.c3 AND t2.c4 =“something”

我以为我可以做类似的事情：

delete
FROM table1 t1
INNER JOIN table2 t2
 on 
 (t1.c1 = t2.c1 
  AND t1.c2 = t2.c2 
  AND t1.c3 = t2.c3)
 where t2.c4 = 'something'

但是，在此之前我正在尝试

select *
FROM table1 t1
INNER JOIN table2 t2
 on 
 (t1.c1 = t2.c1 
  AND t1.c2 = t2.c2 
  AND t1.c3 = t2.c3)
 where t2.c4 = 'something'

并且它没有返回我想要删除的记录。

有关如何修复此查询的任何提示？（在oracle工作）

Answer 1

你非常接近！只需在DELETE关键字

之后添加要删除的表名称

DELETE  t1   -- <<==== HERE
FROM    table1 t1
        INNER JOIN table2 t2
            ON  t1.c1 = t2.c1 AND 
                t1.c2 = t2.c2 AND 
                t1.c3 = t2.c3
 WHERE  t2.c4 = 'something'

Answer 2

我懂了!!

 DELETE  
    FROM    table1 t1
    WHERE EXISTS
      SELECT * 
      from table2 t2
      where  t1.c1 = t2.c1 AND 
            t1.c2 = t2.c2 AND 
            t1.c3 = t2.c3 AND
            t2.c4 = 'something'

sql语句根据另一个故事中的记录删除表1中的行

2 个答案: