如何计算月差 SQL DB2

Question

我有一个数字格式“202101”的变量 CREATION_DATE 表示年份和月份，我需要计算该日期和当前日期之间的月份差异，我已经尝试过：

MONTHS_BETWEEN(
  DATE(TIMESTAMP_FORMAT(CHAR(CREATION_DATE),'YYYYMM')),
  DATE(TIMESTAMP_FORMAT(CHAR(
    YEAR(CURRENT DATE)*100+MONTH(CURRENT DATE)),
    'YYYYMM'
  )))

还有这个：

MONTHS_BETWEEN(
  DATE(TIMESTAMP_FORMAT(CHAR(CREATION_DATE),'YYYYMM')),
  CURRENT DATE
)

Answer 1

看看这个：

WITH temp(creation_date) AS (VALUES ('202102')
)
SELECT creation_date
     , CURRENT date
     , months_between(CURRENT date, DATE(TIMESTAMP_FORMAT(CHAR(CREATION_DATE),'YYYYMM')))
FROM temp

如何计算月差 SQL DB2

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