为什么从 current_date 中提取周给出错误的周数

Question

select extract(week from current_date) is giving 16 but current ISO week is 17. Is this a bug or am I doing something wrong? Last week it worked OK.

Answer 1

You might be looking for:

extract(isoweek from current_date)

As per the documentation :

WEEK : Returns the week number of the date in the range [0, 53] . Weeks begin with Sunday, and dates prior to the first Sunday of the year are in week 0.

ISOWEEK : Returns the ISO 8601 week number of the date_expression. ISOWEEK s begin on Monday. Return values are in the range [1, 53] . The first ISOWEEK of each ISO year begins on the Monday before the first Thursday of the Gregorian calendar year.