系统设计时应尽可能避免出现left outer join, right outer join
今天盖尔找我优化一条SQL，SQL以下：html SELECT DISTINCT b.organ_id,
c.company_name as organ_name,
a.distri_date,
a.distri_type,
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相关文章
- 1. mysql， LEFT OUTER JOIN 与 LEFT JOIN，RIGHT OUTER JOIN 与RIGHT JOIN ，FULL OUTER JOIN 与 FULL JOIN区别与联系
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