如何优化oracle数据库性能.pdf

) 󰅎󰅔󰁵 Oracle 󰁵

Select * From Emp;

select a.sdesc b.location from work_city a plant_detail b where a.city_id

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FROM EMP E 

6.SELECT 󰇑󰅰󰁉  * 

WHERE EMP_NO = 291;