SQL——将两列合并成一列

将两列合并连接成一列，需要注意的是列的格式必须是NVARCHAR或者VARCHAR类型

SELECT ','+Convert(NVARCHAR(30), call_uuid, 0 ) +','+agent_code 
as PerDateFROM cc_log_call_eco where agent_code='1001'

	PerDate
1	,980408102500000,1001
2	,980414313125000,1001
3	,980415770937500,1001
4	,980416111875000,1001