mysql - best way to combine two tables that have same columns and different values -
i have problem finding best way combine 2 of tables in sql.
have 2 user-feature tables below same columns different values:
2 table represent user-feature profile of user , generate different sources need combine single user-feature table , dont know if data user(i) table1 more authentic or table2.
think best way combine 2 table?
example should use mean value or max-min or there better way?
table1: user feature1 feature2 2 8 b 4 3 c 1 6
table2:
user feature1 feature2 3 6 b 2 4 c 4 8
you're going have @ code uses these tables , see how differs
maybe 1 table isn't used more
maybe 1 table setting user interface features , other setting data processing features (in case make 1 table called features 4 columns called uifeature1, uifeature2, dpfeatire1, dpfeature2
essentially here have asked question no 1 on internet can answe you; you're going have research yourself
Comments
Post a Comment