mysql - Dynamically added column to sql results -


enter image description here

i'd have sql results containing dynamically added fields. picture attached explains aim at.

as far i've made below, yet doesn't work.

select s.num, s.name ( select g.grade g.subject grades g g.student = s.id ) students s;

note want have column name corresponding value of column subject. have no idea how it.

you need construct dynamic sql prepared statements.

http://blog.sqlauthority.com/2014/06/20/mysql-dynamic-sql-with-execute-and-prepare-statements/

the columns come "as history" ... "as math"

as far nulls common outer join action


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