2017-03-29 10 views

답변

0

trunc(timestamp, 'J')을 사용해야합니다. , 당신이 일주일의 시작 일을 '사용하고있는 일에 대한 설명서를 참조하십시오

trunc(timestamp, string unit) 
Purpose: Strips off fields from a TIMESTAMP value. 
Unit argument: The unit argument value is case-sensitive. This argument string can be one of: 
SYYYY, YYYY, YEAR, SYEAR, YYY, YY, Y: Year. 
Q: Quarter. 
MONTH, MON, MM, RM: Month. 
WW, W: Same day of the week as the first day of the month. 
DDD, DD, J: Day. 
DAY, DY, D: Starting day of the week. (Not necessarily the current day.) 
HH, HH12, HH24: Hour. A TIMESTAMP value truncated to the hour is always represented in 24-hour notation, even for the HH12 argument string. 
MI: Minute. 

https://www.cloudera.com/documentation/enterprise/latest/topics/impala_datetime_functions.html

0

쉽고, 단지 SELECT TRUNC (타임 스탬프,'D ') + 간격 1 일을 시도;