sql - MSSql (Compact) DELETE-Query with JOIN

Question

我有这个查询。我想从 AgentsResultLinks-Table 中删除所有没有指向 Results-Table 中实体的链接的实体。我想要一个单一查询的解决方案。我收到由“*”引起的错误。

DELETE AgentResultLinks.*
FROM AgentResultLinks LEFT JOIN Results 
ON AgentResultLinks.ResultID = Results.ID
WHERE Results.ID IS NULL

有人可以帮我将此查询转换为紧凑型数据库的 vaid mssql 查询吗？性能非常重要。

score 9 · Accepted Answer

只需.*从AgentResultLinks.*

DELETE Agent
FROM AgentResultLinks Agent 
LEFT JOIN Results R
       ON Agent.ResultID = R.ID
WHERE R.ID IS NULL;

请参阅DELETE语法：DELETE (Transact-SQL)

score 4 · Accepted Answer

4

DELETE FROM AgentResultLinks 
where ResultID not in(select distinct ID from Results)

于 2012-09-21T08:06:47.543 回答

2 回答 2