题解 | #用where过滤空值练习#
用where过滤空值练习
https://www.nowcoder.com/practice/08c9846a423540319eea4be44e339e35
select device_id, gender,age,university from user_profile where age is not null;
not null 过滤空值, 其余不多做解释。
用where过滤空值练习
https://www.nowcoder.com/practice/08c9846a423540319eea4be44e339e35
select device_id, gender,age,university from user_profile where age is not null;
not null 过滤空值, 其余不多做解释。
相关推荐