我该如何简化这个mysql查询？

Question

I have these 4 queries repeated 3 times for each agent. Is there anyway to simplify/combine these queries? I don't mind using a while loop for the sums. The only thing that changes are the dates.

$john_week_total  = mysql_result(mysql_query("SELECT SUM(tp) FROM info WHERE type='life' AND date >= '$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

You can have multiple SUM aggregators in the field list

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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Your code is vulnerable to injection. You should use properly parameterized queries with PDO or mysqli