有没有办法使用sql获取最佳记录

Question

In a database with million of records, would it be a possible way to take the best records (ie. rows with the most populated columns)

SEQ_ID | PERSON_ID | GENDER | DOB        | COUNTRY
1      |  A000001  |  Male  | 01-01-1970 | 
2      |  A000001  |        |            | Indonesia

Would it be possible to take the 2 Records to combine it into 1? Eg

SEQ_ID | PERSON_ID | GENDER | DOB        | COUNTRY
1      |  A000001  |  Male  | 01-01-1970 | Indonesia

Answer 1

With your example, you can use aggregation:

select MIN(SEQ_ID), PERSON_ID, MAX(GENDER), MAX(DOB), MAX(COUNTRY)
from t
group by PERSON_ID;

It is not clear if this will work generally on your data, but this does answer the question that you asked. If this doesn't work, you should ask a new question, with more appropriate data and explanation of the logic you want to use.