[英]How to get MAX rownumber with rowNumber in same query
I have ROW_NUMBER() OVER (ORDER BY NULL) rnum
in a sql statement to give me row numbers.我在 sql 语句中有
ROW_NUMBER() OVER (ORDER BY NULL) rnum
来给我行号。 is there a way to attach the max rnum to the same dataset going out?有没有办法将最大 rnum 附加到同一个数据集出去?
what I want is the row_number()
which I get, but I also want the MAXIMUM rownumber of the total return on each record.我想要的是我得到的
row_number()
,但我也想要每条记录的总回报的最大行数。
SELECT
ROW_NUMBER() OVER (ORDER BY NULL) rnum,
C.ID, C.FIELD1, C."NAME", C.FIELD2, C.FIELD3
FROM SCHEMA.TABLE
WHERE (C.IS_CRNT = 1)
), MAX_NUM as (
SELECT DATA.ID, max(rnum) as maxrnum from DATA GROUP BY DATA.COMPONENT_ID
) select maxrnum, DATA.* from DATA JOIN MAX_NUM on DATA.COMPONENT_ID = MAX_NUM.COMPONENT_ID
DESIRED RESULT (ASSUMING 15 records):期望的结果(假设 15 条记录):
1 15 DATA
2 15 DATA
3 15 DATA
etc...
I think you want count(*)
as a window function:我想你想要
count(*)
作为 window function:
SELECT ROW_NUMBER() OVER (ORDER BY NULL) as rnum,
COUNT(*) OVER () as cnt,
C.ID, C.FIELD1, C."NAME", C.FIELD2, C.FIELD3
FROM SCHEMA.TABLE
WHERE C.IS_CRNT = 1
Based on my assumptions in your dataset, this is the approach I would take:根据我在您的数据集中的假设,这是我将采取的方法:
WITH CTE AS (
select C.ID, C.FIELD1, C."NAME", C.FIELD2, C.FIELD3, ROW_NUMBER() OVER (PARTITION BY ID ORDER BY ID)
FROM SCHEMA.TABLE WHERE (C.IS_CRNT = 1))
SELECT *, (select count(*) from cte) "count" from cte;
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