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<>'null';
这里的年龄是字符串,需要带' ',不然会报错
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<>'null';
这里的年龄是字符串,需要带' ',不然会报错
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