Question

我需要在日期等于特定日期时选择行，其中TIMESTAMP列包含日期时间。

这很好用，

select USERNAME from ACCESSACTIVITY where UPPER(LOCATION)=UPPER('remote-PC')and TIMESTAMP = STR_TO_DATE('28-05-2016 01:00:00','%d-%m-%Y %H:%i:%s')

当我避开时间时，它不起作用。

select USERNAME from ACCESSACTIVITY where UPPER(LOCATION)=UPPER('remote-PC')and TIMESTAMP = STR_TO_DATE('28-05-2016 ','%d-%m-%Y')

Answer 1

使用：

select USERNAME from ACCESSACTIVITY where UPPER(LOCATION)=UPPER('remote-PC')and TIMESTAMP LIKE STR_TO_DATE('28-05-2016 ','%d-%m-%Y')+'%'

Answer 2

您不需要通配符。试试这个：

select USERNAME from ACCESSACTIVITY where UPPER(LOCATION)=UPPER('remote-PC')and DATE(TIMESTAMP) = STR_TO_DATE('28-05-2016 ','%d-%m-%Y')

Answer 3

假设timestamp存储为datetime，请使用不等式：

select USERNAME
from ACCESSACTIVITY
where UPPER(LOCATION)=UPPER('remote-PC') and
     TIMESTAMP >= DATE('2016-05-28') AND
     TIMESTAMP < DATE('2016-05-29');

如果有适当的索引，这允许数据库引擎在TIMESTAMP上使用索引。

SQL查询从datetime选择日期等于行

3 个答案: