查询所有列字段
SELECT COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 't_example';
逗号拼接
SELECT GROUP_CONCAT(COLUMN_NAME)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 't_example';
其他拼接符号
SELECT GROUP_CONCAT(COLUMN_NAME SEPARATOR '-')
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 't_example';