Dank @Jan Sršeň. Als er schlage ich die Abfrage unter:
$query = sprintf("SELECT count(`p`.`user_id`) as `post_cnt`, `w`.`id` as `author`,date_posted from posts as p join writer w on `p`.`user_id` = `w`.`id` where `p`.`user_id` = '$user_id' group by `date_posted`");
und eine JSON-Datei erzeugen:
[{"post_cnt":"3","author":"1001","date_posted":"2017-01-08 14:26:14"},{"post_cnt":"1","author":"1001","date_posted":"2017-01-12 08:37:55"},{"post_cnt":"4","author":"1001","date_posted":"2017-01-12 23:27:23"},{"post_cnt":"1","author":"1001","date_posted":"2017-01-12 23:29:15"},{"post_cnt":"2","author":"1001","date_posted":"2017-01-12 23:30:27"},{"post_cnt":"1","author":"1001","date_posted":"2017-01-12 23:31:04"},{"post_cnt":"1","author":"1001","date_posted":"2017-01-12 23:33:03"}]
ich dann diese Daten in ChartJS verwendet, um ein Liniendiagramm zu generieren!
Vielen Dank!
Stift und Papier? – Strawberry