sql语句:
DELETE FROM `phome_ecms_news_index` WHERE `id` IN (SELECT id FROM `phome_ecms_news_data_1` WHERE `newstext`='');
DELETE FROM `phome_ecms_news` WHERE `id` IN (SELECT id FROM `phome_ecms_news_data_1` WHERE `newstext`='');
DELETE FROM `phome_ecms_news_data_1` WHERE `newstext`='';
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