foreign key error in sql

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foreign key error in sql

create table matchdetails(mid varchar2(10),mdate date,team1 varchar2(10),team2 varchar2(10), stadium varchar2(10),city varchar2(10),mom varchar2(10),primary key(mid,mdate);

->the match tablle is created

create table batsman(mid varchar2(10),pid varchar2(10),runs varchar2(10),balls varchar2(10), fours varchar2(10),sixes varchar2(10),primary key(mid.pid), foreign key(mid) references matchdetails(mid));

->for the above batsman table it shows error on foreign key can any one tell me plz how to reference matchdetails

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