1、纵向列出所有字段

SELECT COLUMN_NAME  FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'tablename';

2、横向列车所有字段，以‘，’分隔

SELECT STUFF((SELECT ', ' + column_name
              FROM information_schema.columns
              WHERE table_name = 'tablename'
              FOR XML PATH('')), 1, 2, '') AS all_columns