Sql 从结果中删除第一个逗号

如果我运行这个查询，我将以，01，03，05，29，35的形式返回输出

那个么，有并没有任何方法可以使用上面的查询去掉第一个逗号。所以结果应该是01、03、05、29、35，请尝试：

DECLARE @WithdrawnClasses VARCHAR(MAX) = ''
SELECT @WithdrawnClasses = COALESCE(@WithdrawnClasses + ', ', '') + fcd.ClassNbr
FROM XR.FrmCM9Details fcd
INNER JOIN XR.FrmCM9 fc ON fcd.FrmCM9FK = fc.Id
AND fc.FrmMstFK = '00775549-4EB9-478B-AFD5-5667BD9AA7EE'
SELECT @WithdrawnClasses

或者删除变量

@drawinnclasses

select @WithdrawnClasses =STUFF(@WithdrawnClasses , 1, 1, '')

DECLARE @WithdrawnClasses VARCHAR(MAX)
SELECT 
  @WithdrawnClasses = COALESCE(@WithdrawnClasses + ', ', '') + fcd.ClassNbr
FROM XR.FrmCM9Details fcd
INNER JOIN XR.FrmCM9 fc ON fcd.FrmCM9FK = fc.Id
  AND fc.FrmMstFK = '00775549-4EB9-478B-AFD5-5667BD9AA7EE'

SELECT @WithdrawnClasses=SUBSTRING(@WithdrawnClasses,1,LEN(@WithdrawnClasses)-1)