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删除数据库名称重复的数据 
 
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DELETE FROM{pre}vodwhere vod_id not in(SELECT vod_id FROM{pre}vodGROUP BY vod_name HAVING COUNT(*)>1)
															
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DELETE FROM{pre}vodwhere vod_id not in(SELECT vod_id FROM{pre}vodGROUP BY vod_name HAVING COUNT(*)>1)
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