当SELECT查询包含两个或更多关系时，PostgreSQL规划器可以使用哪些连接策略？( )
INNER JOIN, OUTER JOIN
MERGE, INNER JOIN, OUTER JOIN
MERGE, JOIN
Nested Loop Join, Merge Join, Hash Join
青云测评
青云测评
当SELECT查询包含两个或更多关系时，PostgreSQL规划器可以使用哪些连接策略？( )
INNER JOIN, OUTER JOIN
MERGE, INNER JOIN, OUTER JOIN
MERGE, JOIN
Nested Loop Join, Merge Join, Hash Join
