25 lines
592 B
MySQL
25 lines
592 B
MySQL
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/*
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数据库回滚脚本 - 恢复联络单号和件号合并
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执行日期: 2026-02-04
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目的: 如果需要回滚，删除ContactNumber和ItemNumber字段
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影响表: scandata
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*/
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USE fullautowaterpressure;
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-- 1. 删除索引
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DROP INDEX IF EXISTS `idx_contact_number` ON `scandata`;
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DROP INDEX IF EXISTS `idx_item_number` ON `scandata`;
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-- 2. 删除新增字段
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ALTER TABLE `scandata`
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DROP COLUMN IF EXISTS `ContactNumber`,
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DROP COLUMN IF EXISTS `ItemNumber`;
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-- 3. 验证回滚
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DESCRIBE `scandata`;
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-- 4. 显示回滚后的数据
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SELECT * FROM `scandata` ORDER BY Id DESC LIMIT 10;
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