SQL Server-在所有行的一列中返回最大值

Question

我可以使用一些SQL幫助來解決以下問題。

我有一個包含以下列和數據的表。

CUSTOMER PAYMENT_YEAR BILLS_PER_YEAR BILL_NUMBER
Chris    2010         1              1
Chris    2010         2              2
Chris    2010         3              3

我想返回所有三行，但在所有三行中都具有最大bills_per_year值。 想要這樣。

CUSTOMER  PAYMENT_YEAR  BILLS_PER_YEAR  BILL_NUMBER
Chris     2010          3               1
Chris     2010          3               2
Chris     2010          3               3

Answer 1

對您有用嗎？

SELECT CUSTOMER, PAYMENT_YEAR, BILLS_PER_YEAR, BILL_NUMBER,
MAX(BILLS_PER_YEAR) OVER (PARTITION BY CUSTOMER,PAYMENT_YEAR) as max_per_year
FROM table1

Answer 2

這是你的意思嗎？

SELECT 
    CUSTOMER, 
    PAYMENT_YEAR, 
    MAX(BILLS_PER_YEAR) OVER(PARTITION BY CUSTOMER, PAYMENT_YEAR) BILLS_PER_YEAR,
    BILL_NUMBER
FROM TableName