php - 我怎样才能简化这个 mysql 查询？

Question

我为每个代理重复了 3 次这 4 个查询。有没有办法简化/合并这些查询？我不介意使用 while 循环求和。唯一改变的是日期。

$john_week_total  = mysql_result(mysql_query("SELECT SUM(tp) FROM info WHERE type='life' AND date >= '$monday' AND rvp ='john smith'"),0);
$john_month_total = mysql_result(mysql_query("SELECT SUM(tp) FROM info WHERE type='life' AND date >= '$this_month' AND rvp ='john smith'"),0);
$john_year_total  = mysql_result(mysql_query("SELECT SUM(tp) FROM info WHERE type='life' AND date >= '$this_year' AND rvp ='john smith'"),0);
$john_total       = mysql_result(mysql_query("SELECT SUM(tp) FROM info WHERE type='life' AND rvp ='john smith'"),0);

Answer 1

字段列表中可以有多个SUM聚合器

SELECT
    SUM(IF(date >= '$monday' AND rvp = 'john smith'), tp, 0) AS john_week_total
    SUM(IF(date >= '$this_month' AND rvp = 'john smith'), tp, 0) AS john_month_totalo
    -- etc.
FROM
    info
WHERE
    type = 'life'

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您的代码容易受到注入(inject)攻击。您应该对 PDO 或 mysqli 使用正确的参数化查询