sql的date函数 提取日期部分

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select id,make_invoice_time from t_invoice_detail where make_invoice_time=‘2018-11-09’
搜不到任何

使用date提取出日期之后
select id,make_invoice_time from t_invoice_detail where Date(make_invoice_time)=‘2018-11-09’

因此 select id,make_invoice_time from t_invoice_detail where make_invoice_time=‘2018-11-09’
等效于
select id,make_invoice_time from t_invoice_detail where make_invoice_time=‘2018-11-09 00:00:00’

make_invoice_time的类型为

那疑问 Date对数据库里的varchar字段有效吗？

这是目前的数据

执行sql
select id,transfer_date from t_invoice_detail where Date(transfer_date)=‘2019-01-10’

有效