[英]Combining if statements and multiple sql queries into one query
我有一台服务器,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,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;
}
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,否则将被视为 0。
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