insert into tableName select
top 1 '刘婷婷1',18
where not exists (select 1 from tableName
where Age = 18 and Name = '刘婷婷1');
导入数据时 为避免出现重复数据的Sql语句
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转载自blog.csdn.net/qq_34059765/article/details/84256138
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