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QSqlQuery查询一条记录明显是没有这条记录的,但是query.record().count()返回值为1,再调用query.first()是返回是false。sql语句如下: select id,name from tmp_use where id = 99; 这条sql语句用sqlite管理工具绝对是查不出记录的。奇了怪了!