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随笔59 SQL Left Join, Right Join, Inner Join, and Natural Join

分类: 文章 • 2025-01-30 19:53:46

随笔59 SQL Left Join, Right Join, Inner Join, and Natural Join

1 A LEFT JOIN B      =       A LEFT OUTER JOIN B
2 A RIGHT JOIN B     =       A RIGHT OUTER JOIN B
3 A FULL JOIN B      =       A FULL OUTER JOIN B
4 A INNER JOIN B     =       A JOIN B

 

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