FMDB删除前50条数据的写法

删除前50条数据web delete from tab where (select count(Id) from tab)> 50 and Id in (select Id from tab order by Id ASC limit 50); 换成相应的数量便可，若想删除50条以后的数据，用这个：sql delete from tab where (select count(Id) from t

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