php - 如何将这两个查询合并为一个？

Question

$a = mysql_query("SELECT COUNT(*) as `count_1` FROM `table_1` WHERE `this_1` = '1'");
$b = mysql_fetch_assoc($a);

$c = mysql_query("SELECT COUNT(*) as `count_2` FROM `table_1` WHERE `this_2` = '1'");
$d = mysql_fetch_assoc($c);

Answer 1

使用 UNION ALL 使其成为单个查询:

SELECT COUNT(*) as count_1 FROM table_1 WHERE this_1 = '1'
UNION ALL
SELECT COUNT(*) as count_2 FROM table_1 WHERE this_2 = '1'

So that would result in

$a = mysql_query("...the complete query from above...");