CREATE TABLE sys_account (
    `id` BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY
  , `username` VARCHAR(255) NOT NULL
  , `account_status` VARCHAR(2) NOT NULL
  , `create_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
  , `created_by` BIGINT NOT NULL
  , `update_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
  , `updated_by` BIGINT DEFAULT NULL
  , `version` BIGINT NOT NULL DEFAULT 0
)