mysql 中sql语句关键字的书写顺序与执行顺序
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2022-09-04 18:54:35
书写顺序: select -> from -> where -> group by -> having -> order by 执行顺序: from -> where -> group by -> having -> select -> order by ......
书写顺序:
select -> from -> where -> group by -> having -> order by
执行顺序:
from -> where -> group by -> having -> select -> order by