介绍一下什么意思https://pan.baidu.com/s/1J2K3L4M5N6O7P8Q9R0S?pwd=tuv7
https://pan.baidu.com/s/7O8P9Q0R1S2T3U4V5W6X?pwd=efgh
https://pan.baidu.com/s/5E6F7G8H9I0J1K2L3M4N?pwd=efg2
https://pan.baidu.com/s/9J0K1L2M3N4O5P6Q7R8S
ALTER TABLE `owned_vehicles` ADD `insurance` VARCHAR(100) NOT NULL DEFAULT 'none' AFTER `state`,ADD `cooldown` INT NOT NULL DEFAULT '0' AFTER `insurance`;https://pan.baidu.com/s/5M6N7O8P9Q0R1S2T3U4V?pwd=wxyz
MySQL 返回: [color=var(--bs-link-color)][url=http://localhost/phpmyadmin/url.php?url=https%3A%2F%2Fdev.mysql.com%2Fdoc%2Frefman%2F8.0%2Fen%2Fserver-error-reference.html][/url]https://pan.baidu.com/s/5O7P8Q9R0S1T2U3V4W5X
#1054 - 未知列'state'在'owned_vehicles'https://pan.baidu.com/s/4F5G6H7I8J9K0L1M2N3O
https://pan.baidu.com/s/2S3T4U5V6W7X8Y9Z0A1B?pwd=uvwx
https://pan.baidu.com/s/5M6N7O8P9Q0R1S2T3U4V?pwd=wxyz
https://pan.baidu.com/s/7H8I9J0K1L2M3N4O5P6Q?pwd=klm1 https://pan.baidu.com/s/5W6X7Y8Z9A0B1C2D3E4F?pwd=efg0
https://pan.baidu.com/s/3K4L5M6N7O8P9Q0R1S2T?pwd=opqr
https://pan.baidu.com/s/7Q9R0S1T2U3V4W5X6Y7Z
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