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不会有大多数人都和我一样的认为,是先进行的Where 剔除结果集,再进行Join的吧
SQL server 2014 逻辑执行标准:
https://msdn.microsoft.com/en-us/library/ms189499(v=sql.120).aspx
FROM
FROM
ON
JOIN
WHERE
GROUP BY
WITH CUBE or WITH ROLLUP
HAVING
SELECT
DISTINCT
ORDER BY
TOP
Oracle 12c 逻辑执行标准
http://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_10002.htm
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原文地址:http://www.cnblogs.com/SignalTips/p/4378101.html