一种简单的表中删除重复行的方法
duignoreSameandcreatedeleteexistmethodofSimplesurfacein the tablerepeat
先创建一个与原表一样的表，
然后在表上创建 ignore_dup_key 索引，如下:
CREATE UNIQUE INDEX removedups
ON #table_copy (name)
WITH IGNORE_DUP_KEY
然后在导入原表数据,简单吧
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