mysqlとphpで異なるユーザーの合計値を取得します

SELECT  MIN(a.ID) ID, a.name, SUM(b.Price) Price
FROM    table1 a
        INNER JOIN table2 b
            ON a.PID = b.PID
GROUP   BY a.Name

• SQLFiddleデモ

出力

╔════╦══════╦═══════╗
║ ID ║ NAME ║ PRICE ║
╠════╬══════╬═══════╣
║  1 ║ ram  ║  4333 ║
║  2 ║ rani ║  2000 ║
╚════╩══════╩═══════╝