从数据块 SQL 中的日期查找一个月中的第几周
Finding week of the month from the date in databricks SQL
我正在尝试从数据块 sql
中的日期获取 week_of_the_month
这是我的 SQL:
with date as (
select EXTRACT(DAY FROM '2017-01-01') as day
)
select case
when day < 8 then '1'
when day < 15 then '2'
when day < 22 then '3'
else '4'
end as week_of_month
上面的sql在一些极端情况下失败了。例如2010-03-31
,那么week_of_month = 5
如何在数据块 SQL 中找到 week_of_month?
按照你的说法,你还要添加另一个 when
子句
select case
when day < 8 then '1'
when day < 15 then '2'
when day < 22 then '3'
when day < 29 then '4' --> new
else '5' --> modified
end as week_of_month
我正在尝试从数据块 sql
中的日期获取 week_of_the_month这是我的 SQL:
with date as (
select EXTRACT(DAY FROM '2017-01-01') as day
)
select case
when day < 8 then '1'
when day < 15 then '2'
when day < 22 then '3'
else '4'
end as week_of_month
上面的sql在一些极端情况下失败了。例如2010-03-31
,那么week_of_month = 5
如何在数据块 SQL 中找到 week_of_month?
按照你的说法,你还要添加另一个 when
子句
select case
when day < 8 then '1'
when day < 15 then '2'
when day < 22 then '3'
when day < 29 then '4' --> new
else '5' --> modified
end as week_of_month