我正在开发一个项目,在那里我获得了一个SQL文件来生成数据库和一些示例值.其中一个字段(HTMLContent)是类型blob,插入其中的值在表单中X'<long-string-of-numbers-and-letters>'.
领先的'X'意味着什么?
CREATE TABLE `advertDOM` (
`id` int(11) NOT NULL,
`HTMLContent` blob COMMENT 'DOM data to be displayed on screen',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `advertDOM` (`id`, `HTMLContent`)
VALUES
(1,X'3C646976206964203D2022636F6E74656E742220636C617373203D202266756C6C73637265656E2D6C616E647363617065223E0A20203C646976206964203D202277312D636F6E7461696E6572223E0A202020207B77317D0A20203C2F6469763E0A3C2F6469763E'),
(2,X'3C646976206964203D2022636F6E74656E742220636C617373203D202274776F2D77696E646F772D6C616E647363617065223E0A20203C646976206964203D202277312D636F6E7461696E6572223E0A202020207B77317D0A20203C2F6469763E0A20203C646976206964203D202277322D636F6E7461696E6572223E0A202020207B77327D0A20203C2F6469763E0A3C2F6469763E'),
(3,X'3C646976206964203D2022636F6E74656E742220636C617373203D202266756C6C73637265656E2D706F727472616974223E0A20203C646976206964203D202277312D636F6E7461696E6572223E0A202020207B77317D0A20203C2F6469763E0A3C2F6469763E'),
(4,X'3C646976206964203D2022636F6E74656E742220636C617373203D202274776F2D77696E646F772D706F727472616974223E0A20203C646976206964203D202277312D636F6E7461696E6572223E0A202020207B77317D0A20203C2F6469763E0A20203C646976206964203D202277322D636F6E7461696E6572223E0A202020207B77327D0A20203C2F6469763E0A3C2F6469763E');
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