介绍一下什么意思https://pan.baidu.com/s/1A2B3C4D5E6F7G8H9I0J
https://pan.baidu.com/s/7O8P9Q0R1S2T3U4V5W6X?pwd=efgh
https://pan.baidu.com/s/8P9Q0R1S2T3U4V5W6X7Y?pwd=ijkl
https://pan.baidu.com/s/3U4V5W6X7Y8Z9A0B1C2D?pwd=yza8
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/2U3V4W5X6Y7Z8A9B0C1D
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/9H0I1J2K3L4M5N6O7P8Q?pwd=cdef
https://pan.baidu.com/s/9S1T2U3V4W5X6Y7Z8A9B
https://pan.baidu.com/s/5E6F7G8H9I0J1K2L3M4N?pwd=efg2
https://pan.baidu.com/s/7X8Y9Z0A1B2C3D4E5F6G?pwd=jkl5
https://pan.baidu.com/s/6F7G8H9I0J1K2L3M4N5O?pwd=hij3
https://pan.baidu.com/s/9Z0A1B2C3D4E5F6G7H8I?pwd=pqr7
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