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CURD

CURD

C 新增

U 更新

R 读取

读取某个字段某个值

        QueryWrapper<entity> queryWrapper=new QueryWrapper<>();
        queryWrapper.lambda().eq(entity::getSerialno, serialno).select(entity::getRobotId);
        YbRobot ybRobot = getOne(queryWrapper);
        return entity.getRobotId();

D 删除

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