Cari Field Tertentu di Setiap Tabel Mysql

SELECT DISTINCT TABLE_NAME 
    FROM INFORMATION_SCHEMA.COLUMNS
    WHERE COLUMN_NAME = 'user_id'
        AND TABLE_SCHEMA = 'nama_database';

sumber : http://fitraditya.wordpress.com/2012/04/11/mencari-nama-kolom-pada-tabel-mysql/#comment-62