SELECT COLUMN_NAME "字段名称", COLUMN_TYPE "字段类型", CHARACTER_MAXIMUM_LENGTH "字段最大长度", IF( EXTRA = "auto_increment", CONCAT( COLUMN_KEY, "(", IF ( EXTRA = "auto_increment", "自增长", EXTRA ), ")" ), COLUMN_KEY ) "主外键", IS_NULLABLE "空标识", COLUMN_COMMENT "字段说明" FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '库名' AND TABLE_NAME = '表名';