我的数据库中有逗号分隔的字段 base_users
。如何查询以计算该组的 totaluser
?如果数据不在逗号分隔字段中,我可以毫无问题地计算 totaluser
。
SELECT COUNT(base_u_id) AS totaluser
FROM base_users
WHERE base_u_group =".$row['base_gp_id']."
1)base_users |base_u_id | base_u_name | base_u_group | ------------------------------------------ | 1 | username1 | 1, 2, 4 | | 2 | username2 | 3 | | 3 | username3 | 3, 4 | | 4 | username4 | 1, 4 | 2)base_groups | base_gp_id | base_gp_name | ------------------------------ | 1 | group1 | | 2 | group2 | | 3 | group3 | | 4 | group4 | | 5 | group5 |
From the sample database above, my expected result will be:
Total User of group1 = 2
Total User of group2 = 1
Total User of group3 = 2
Total User of group4 = 3
Total User of group5 = 0
这是我目前尝试过的:
<?php
$getUser = base_executeSQL("SELECT * FROM base_users");
while($row_getUser = base_fetch_array($getUser))
{
$explodeData = explode(", ",$row_getUser['base_u_group']);
foreach($explodeData as $data)
{
$getUserGroupSQL = base_executeSQL("SELECT COUNT(base_u_id) AS totaluser FROM base_users as user, base_groups as gp WHERE gp.base_gp_id ='".$data."' ");
while($UserGroupProfile_row = base_fetch_array($getUserGroupSQL))
if (base_num_rows($getUserGroupSQL)!= 0)
$totaluser = $UserGroupProfile_row["totaluser"];
elseif (base_num_rows($getUserGroupSQL)== 0)
$totaluser = 0;
}
}
?>
最佳答案
使用以下逻辑:只是提示
$group = array(1=>0,2=>0,3=>0,4=>0,5=>0);
$base_u_group = array('1,2,4','3','3,4','1,4');
foreach($base_u_group as $gr) {
$split = explode(',', $gr);
if (!empty($split)) {
foreach($split as $val) {
if ($val) {
$group[$val] = $group[$val] + 1;
}
}
}
}
var_dump($group);
关于php - 计算逗号分隔值的用户数,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30231626/