我正在使用此代码计算所有数字。我在所有表格中添加了价格/数字（10）
$SQL = "SELECT p1 + p2 + p3 + p4 - p0 as total_price from table WHERE id = '1'";
此查询对我有用，首先对所有表格求和p1 = 10 + p2 = 10 .....结果40减去p0 = 2总价格38。
但我想从所有列中减去p0，如
＆＃34; p1 = 10＆＃34; - ＆＃34; p0 = 2＆＃34; = 8
＆＃34; p2 = 10＆＃34; - ＆＃34; p0 = 2＆＃34; = 8
＆＃34; p3 = 10＆＃34; - ＆＃34; p0 = 2＆＃34; = 8
＆＃34; p4 = 10＆＃34; - ＆＃34; p0 = 2＆＃34; = 8和和p1 + p2 + p3 + p4最终结果= 32
答案 0 :(得分：1)
你可以(p1 + p2 + p3 + p4) - 4 * p0。顺便说一句4 * 8 = 32