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Visual explanation of MySQL joins: Difference between revisions
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→狀況1: 交集的資料
m (→預覽輸出資料) |
m (→狀況1: 交集的資料) |
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</table> | </table> | ||
== 狀況1: | == 狀況1: 交集的資料，同時存在於 a 和 b == | ||
http://planetoid.info/images/Venn_diagrams_intersection_of_two_sets.png | http://planetoid.info/images/Venn_diagrams_intersection_of_two_sets.png | ||