题解 | #用where过滤空值练习#
用where过滤空值练习
http://www.nowcoder.com/practice/08c9846a423540319eea4be44e339e35
SELECT device_id, gender, age, university FROM user_profile WHERE age IS NOT NULL ;
用where过滤空值练习
http://www.nowcoder.com/practice/08c9846a423540319eea4be44e339e35
SELECT device_id, gender, age, university FROM user_profile WHERE age IS NOT NULL ;
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