该字段
dob可能具有时间成分。
截断它：
select * from person where CAST(dob AS DATE) between '2011-01-01' and '2011-01-31'
该字段
dob可能具有时间成分。
截断它：
select * from person where CAST(dob AS DATE) between '2011-01-01' and '2011-01-31'
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