mysql - 在查询结果中，防止系列中最后一个数字后面出现逗号

Question

declare @id varchar(500);
set @id=''

select @id =@id+( convert(varchar,business_event_id) +',') 
    from bem.business_event_header substring 
print @id

我不想在最后一个数字后面加逗号。

Answer 1

试试这个:

DECLARE @id VARCHAR(500);

SET @id = '';

SELECT @id = @id+(CONVERT( VARCHAR, business_event_id)+',')
FROM   bem.business_event_header substring;

SELECT @id = SUBSTRING(@id, 1, CHAR_LENGTH
      (@id)-1);

PRINT @id;