-- 修复乱码标题：将 Lead 表中含 U+FFFD 的标题替换为从 PowerChina API 获取的干净版本

-- 先查看当前乱码记录
SELECT '当前乱码记录:' as info;
SELECT id, noticeId, substr(title, 1, 70) as title_trunc FROM Lead WHERE title LIKE '%' || char(65533) || '%';

-- 批量更新
UPDATE Lead SET title = '中国电建重庆工程有限公司兰州新区大数据产业园（二期）项目110kV变配电工程电缆安装施工项目工器具采购项目公开谈判采购公告'
WHERE id = (SELECT id FROM Lead WHERE title LIKE '%兰州新区大数据产业园%' AND title LIKE '%' || char(65533) || '%' LIMIT 1);

UPDATE Lead SET title = '中国电建山东电建一公司海阳核电核能供热银粉漆、醇酸磁漆等采购项目公开竞价采购公告'
WHERE id = (SELECT id FROM Lead WHERE title LIKE '%海阳核电核能供热%' AND title LIKE '%' || char(65533) || '%' LIMIT 1);

UPDATE Lead SET title = '中国电建上海电建公司福建电建上海新能源申能光明长江养殖场 55.8兆瓦渔光互补光伏发电项目EPC总承包箱变采购项目标前公示'
WHERE id = (SELECT id FROM Lead WHERE title LIKE '%上海新能源申能%' AND title LIKE '%' || char(65533) || '%' LIMIT 1);

UPDATE Lead SET title = '中国电建山东电建一公司北方公司黑龙江哈尔滨哈一热项目钢骨架复合管采购项目公开竞价采购公告'
WHERE id = (SELECT id FROM Lead WHERE title LIKE '%黑龙江哈尔滨%' AND title LIKE '%' || char(65533) || '%' LIMIT 1);

UPDATE Lead SET title = '中国电建水电七局三峡枢纽新通道山体排水洞及施工支洞工程柴油采购项目公开询比采购公告'
WHERE id = (SELECT id FROM Lead WHERE title LIKE '%柴油%' AND title LIKE '%' || char(65533) || '%' LIMIT 1);

UPDATE Lead SET title = '中国电建山东电建一公司西北公司新疆喀什煤电项目安全省力型盖板采购项目公开竞价采购公告'
WHERE id = (SELECT id FROM Lead WHERE title LIKE '%新疆喀什%' AND title LIKE '%' || char(65533) || '%' LIMIT 1);

UPDATE Lead SET title = '中国电建重庆工程公司重庆公司重庆电厂2×660MW机组增设启动锅炉改造工程支吊架采购项目公开谈判采购公告'
WHERE id = (SELECT id FROM Lead WHERE title LIKE '%重庆电厂%' AND title LIKE '%' || char(65533) || '%' LIMIT 1);

-- 验证修复结果
SELECT '修复后:' as info;
SELECT id, noticeId, substr(title, 1, 70) as title_trunc FROM Lead WHERE title LIKE '%' || char(65533) || '%';
SELECT '剩余乱码记录数:' as info;
SELECT COUNT(*) FROM Lead WHERE title LIKE '%' || char(65533) || '%';