将varchar转换为日期sqlserver

Question

我每天在varchar和月份和年份也varchar它们是分开如何将它转换的date格式的SQL服务器

Answer 1

DECLARE @Year nvarchar(50) = '2018'
DECLARE @Month nvarchar(50) = '7'
DECLARE @Day nvarchar(50) = '3'

SELECT DATEFROMPARTS(@Year, @Month, @Day)

Answer 2

使用CONVERT（）或CAST（）进行转换

SELECT CONVERT(DATETIME, year_column + month_column + '01') as DateTimeColumn