更新新需求-采集
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-- 不符合 ASIN 库的比对维度从 ASIN 切换到 brand:
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-- 1. brand 为空的历史记录在新规则下不再产生、也不再参与比对,直接删除
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-- 2. 存量 brand 统一转小写,与 CollectDataService.normalizeBrand 对齐
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-- (历史数据写入前已经过 trim + 折叠空白,仅缺 lowerCase)
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DELETE FROM biz_invalid_asin_data
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WHERE brand IS NULL
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OR TRIM(brand) = '';
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UPDATE biz_invalid_asin_data
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SET brand = LOWER(TRIM(brand))
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WHERE brand <> LOWER(TRIM(brand));
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