[英]PHP/SQL: Faster Way to Combine Query Results
I'm joining data from two SQL queries and I'm wondering if there is a faster way to do this as a single SQL query because there is a lot of looping involved. 我正在连接来自两个SQL查询的数据,我想知道是否有更快的方法作为单个SQL查询来执行此操作,因为其中涉及很多循环。 I've got two queries that look for different string values in the "option_name" field:
我有两个查询,它们在“ option_name”字段中查找不同的字符串值:
$sql01= "SELECT user_id, option_value FROM wp_wlm_user_options WHERE option_name = 'wpm_login_date' ORDER BY user_id";
$sql02 = "SELECT user_id, option_value FROM wp_wlm_user_options WHERE option_name ='stripe_cust_id' ORDER BY user_id ";
Then I create two arrays: 然后创建两个数组:
//Process the 1st SQL query data into an Array
$result_array01 = array();
$j = 0;
while($r = mysql_fetch_assoc($result01)) {
if(!empty($r['option_value'])){
//User Id and Last Login
$result_array01[$j]['user_id'] = $r['user_id'];
$result_array01[$j]['last_login'] = $r['option_value'];
$j++;
}
}
//Process the 2nd SQL query data into an Array
$result_array02 = array();
$k = 0;
while($s = mysql_fetch_assoc($result02)) {
if(!empty($s['option_value'])){
//User Id and Stripe Customer Id
$result_array02[$k]['user_id'] = $s['user_id'];
$result_array02[$k]['cust_id'] = $s['option_value'];
$k++;
}
}
And finally, I combine the arrays: 最后,我结合数组:
//Combine the SQL query data in single Array
$combined_array = array();
$l = 0;
foreach($result_array01 as $arr01){
// Check type
if (is_array($arr01)) {
//mgc_account_print("hello: " . $arr01['user_id'] . "\r\n");
foreach($result_array02 as $arr02){
// Check type
if (is_array($arr02)) {
//Check if User Id matches
if($arr01['user_id'] == $arr02['user_id']){
//Create Array with User Id, Cust Id and Last Login
$combined_array[$l]['user_id'] = $arr01['user_id'];
$combined_array[$l]['last_login'] = $arr01['last_login'];
$combined_array[$l]['cust_id'] = $arr02['cust_id'];
$l++;
}
}
}
}
}
Why you doing in two different queries? 为什么要在两个不同的查询中执行? Use mysql IN('val', 'val2');
使用mysql IN('val','val2');
$sql01= "SELECT tbl1.user_id, tbl1.option_value FROM wp_wlm_user_options as tbl1 WHERE tbl1.option_name = 'wpm_login_date'
union all
SELECT tbl2.user_id, tbl2.option_value FROM wp_wlm_user_options as tbl2. WHERE tbl2.option_name ='stripe_cust_id' ";
But using OR/AND will your help you in your case , I didnt see at first that you want combined same table. 但是使用OR / AND将在您的情况下为您提供帮助,起初我没有看到您想要组合同一张表。 I didnt delete my answer to help you for another solution
我没有删除答案来帮助您寻求其他解决方案
Also you should use DISTINCT to avoid multiple records. 另外,您应该使用DISTINCT避免出现多个记录。
SELECT DISTINCT USER_ID, OPTION VALUE FROM TABLE
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