Question

我在sql中有两列

year    month
2016    4
2014    5

我现在要做的是将这两列组合在一起并得到句号

输出

year    month    result 
2016    4        201604
2014    5        201405

有办法做到这一点吗？

Answer 1

如果列数据类型是整数，请执行

select year * 100 + month from tablename

Answer 2

首先，您需要CAST他们到VARCHAR以允许连接。然后使用RIGHT month来填充值0：

WITH Tbl AS(
    SELECT 2016 AS [year], 4 AS [month] UNION ALL
    SELECT 2014, 5
)
SELECT *,
    CAST([year] AS VARCHAR(4)) + RIGHT('0' + CAST([month] AS VARCHAR(2)), 2)
FROM Tbl

Answer 3

假设两列都是数字类型：

SELECT year, 
       month,
       CAST(year as char(4)) + RIGHT('00' + CAST(month as varchar(2)), 2) as result
FROM YourTable

如何在sql中组合两列

3 个答案: