sql查詢選擇日期從datetime等於行

Question

我需要選擇行時日期等於特定日期，其中作爲TIMESTAMP列包含日期時間。

這工作得很好，

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') 

在那裏，當我避開時間，這是行不通的。

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

Answer 1

你不需要通配符。 嘗試此：

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

Answer 2

用途：

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

Answer 3

timestamp假設存儲爲datetime，然後使用不等式：

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

這允許數據庫引擎如果適當的索引可用使用索引上TIMESTAMP。