How to query a MYSQL database for all values within an array -

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i have mysql database with users , activity table. user table containing user info , activity table containing messages users activity on site (similar facebooks news feed).

within users table have stored array of friends commas separated string. (friend_list)

i trying select using mysql joins messages friends in friends list , current user , order them activity timestamp.

i thinking this...

$query=mysql_query("select * users,activity users.user=activity.user or //### activity.user equal 1 of users.friend_list array values ### order activity.timestamp")or die(mysql_error());

its tough 1 describe. hope it.

i dont know syntax compare activity.user against array of values (users.friend_list)

its simple when know how. ideas on fantastic.

fix database schema. mysql has no notion of "array of values". should use tables, columns , rows describe data , relationships between entities.

you create friends table can store ids of 2 people being friends. it's matter of doing join.

create table friends (     user1 integer not null,     user2 integer not null,     primary key (user1, user2) );

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