Question

我有一个服务器，它限制了你每小时可以进行的sql查询的数量，所以我试图找到一种方法将我的所有3个if语句和sql查询组合成一个sql查询，并且我想知道这是否可能？请看一下我的代码：

$text1 = "one";
$text2 = "two";
$text3 = "three";

$data = SELECT text FROM tableName WHERE 
text LIKE '%$text1%' AND
text LIKE '%$text2%' AND
text LIKE '%$text3%' order by rand() limit 1;

if ($data == null) {
$data = SELECT text FROM tableName WHERE 
text LIKE '%$text1%' AND
text LIKE '%$text2%' order by rand() limit 1;
}

if ($data == null) {
$data = SELECT text FROM tableName WHERE 
text LIKE '%$text1%' order by rand() limit 1;
}

Answer 1

SELECT text,
((text LIKE '%$text1%') + (text LIKE '%$text2%') + (text LIKE '%$text3%')) as `matches` 
FROM tableName 
HAVING `matches` > 0
ORDER BY `matches` DESC, rand() LIMIT 1

这应该按匹配数对值进行排序，因为每个表达式在匹配时将被视为整数1，否则为0。

将if语句和多个sql查询组合到一个查询中

1 个答案: