join on、where、Group by、having、select、order by执行顺序

执行顺序 :from >  on > where > Group by > having > select > DISTINCT > order by > TOPspa (8)SELECT (9)DISTINCT (11)<Top Num> <select list>排序 (1)FROM [left_table] (3)<join_type> JOIN <right_table> (2)ON <j
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