SQL Server-将数字转换为日期

Question

我有一个包含年和月值的列，例如201908。我想使用此列过滤常规日历日期，并想知道是否有任何建议吗？

Answer 1

Try adding a static '01' to your value and then you should be able to cast it to DATE or DATETIME :

DECLARE @str VARCHAR(10) = '201908'

SELECT CAST(CONCAT(@str, '01') AS DATE)

-- Returns DATE Value = '2019-08-01'

or

DECLARE @str VARCHAR(10) = '201908'

SELECT CAST(@str + '01' AS DATE)

-- Returns DATE Value = '2019-08-01'