随机删除75%的表

Question

试图建立一个较小的样本数据库,但仍然有一些统计相关的数据.如何从表中删除x%的行？一直在使用NEWID()函数.

Answer 1

DELETE 
FROM TABLE_NAME
WHERE PK IN (SELECT TOP (75) PRECENT PK
             FROM TABLE_NAME
             ORDER BY NEWID())

Martin Smith的建议

DELETE T 
FROM (SELECT TOP (75) PERCENT * 
      FROM TABLE_NAME 
      ORDER BY NEWID()) T