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If you are a programmer, do you know how many types of SQL Joins there are?

verano(Summer)
(#9001058@0)
Last Updated: 2014-9-22
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  • 工作学习 / 学科技术讨论 / If you are a programmer, do you know how many types of SQL Joins there are? -verano(Summer); 2014-9-22 {44} (#9001058@0)
    • A programmer should know 3 types of joins: nested loop join, sort-merge join and hash join. -geekcode(文心雕码); 2014-9-22 (#9002258@0)
      • Oops! I know none of them! :( -verano(Summer); 2014-9-23 (#9003941@0)
        • this join is not that join :-) -fallingfromsky(异想天开 ); 2014-9-25 (#9008179@0)
    • inner join, left join, right join. -boolean(北漂一族); 2014-11-11 (#9095126@0)
    • 一般key都是不null的，所以简化一下就是4种 -stanleywang(HeyStan); 2014-11-27 (#9123004@0)
    • 就我的理解有三种：Inner (包括Self-Join), Outer (Full, Left, Right), 及 Cross Join (无需 JOIN 条件) -deep_blue(BLUE); 2014-11-27 (#9124629@0)

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