结合两个 phpmysql 查询

Question

我想结合这两个 php mysql 查询并希望得到一个结果集数组。 第一个查询给出所有成员和 postby 相关的帖子，第二个查询给出所有与管理员相关的帖子，member_id 为 0，post_by 为 0，admin_id 不是 0，super_admin_post 0。

数据库：
1) wall_post_master 这是我的第一个数据库字段。
wp_id, wp_cat_id, wl_text, wp_img, datetime, displevel, mg_id, member_id, family_id, @987654334 @、post_by、photo_id、post_category、generation_id、visible_to、highlight、super_admin_post

2) admin_user_master 这是我的第二个数据库字段。
user_id, family_id, first_name, last_name, password, email_id, user_level

这里显示墙贴数据的条件：
1）如果 mg_id 退出时有多个 member_id 与逗号相关。
2）如果 visible_to 退出时有多个 member_id 与逗号相关。
3)如果 member_id 以当前 member_id 退出。
4)如果 member_id 在 post_by 中退出。
5）如果 member_id 为 0 且 post_by 为 0 且 super_admin_post = 0 则我想显示为管理员帖子。

第一个查询：

$grpsearch = "";
foreach ($arrseltran as $grpid) {
    $grpsearch .= " OR ( FIND_IN_SET('" . $grpid . "', wp.mg_id) AND displevel = 3)";
}
if($time == ""){ $time .= " WHERE"; }else{ $time .=" AND"; }
$time .= "
    wp.family_id = " . $_SESSION['logft']['family_id'] . " AND
    wp.post_category = 0 AND  
    ( 
        wp.member_id = " . $_SESSION['logft']['member_id'] . " OR 
        wp.post_by = " . $_SESSION['logft']['member_id'] . " OR 
        FIND_IN_SET('" . $_SESSION['logft']['member_id'] . "', wp.visible_to) " . $grpsearch . " OR 
        displevel = 1 
    )";

$timeline = "SELECT wp.*, 
wp.member_id, 
wp.datetime AS TimeSpent,
wp_cat.font_color,
photo.photo_path, 
mm.first_name,
mm.middle_name,
mm.last_name,
mm1.first_name AS to_first_name,
mm1.middle_name AS to_middle_name, 
mm1.last_name AS to_last_name
FROM wall_post_master wp 
INNER JOIN 
    wallpost_cat_master wp_cat ON wp_cat.wp_cat_id = wp.wp_cat_id
INNER JOIN 
    member_master mm ON mm.member_id = (CASE WHEN (wp.post_by = 0) THEN wp.member_id ELSE wp.post_by END)
INNER JOIN 
    member_master mm1 ON mm1.member_id = wp.member_id
LEFT JOIN 
    photo_master photo ON photo.photo_id = mm.photo_id
" . $time ." ORDER BY Timespent DESC";

第二次查询：

$timeline1 = "SELECT wpa.*, 
wpa.family_id, 
wpa.datetime AS TimeSpent,
wp_cat.font_color,
wpa.wp_img,
c.family_id,
c.family_name,
c.editor_photo,
aum.first_name,
aum.last_name
FROM wall_post_master wpa 
INNER JOIN 
    wallpost_cat_master wp_cat ON wp_cat.wp_cat_id = wpa.wp_cat_id
INNER JOIN 
    config c ON c.family_id = wpa.family_id
INNER JOIN
    admin_user_master aum ON aum.family_id = wpa.family_id
where 
    aum.user_level = 1 and 
    wpa.admin_id <> 0 and 
    wpa.family_id='".$_SESSION['logft']['family_id']."' and 
    wpa.member_id=0 and 
    wpa.post_by=0  and 
    wpa.super_admin_post=0 
ORDER 
  BY Timespent DESC";

Answer 1

使用Join本身的概念

select a.col1,a.col2,b.col1,b.col3 from first_table as a, second_table as b where a.col1=condition and b.col1=condition

Answer 2

你可以使用mysqli函数：

mysqli_multi_query()

或

mysqli::multi_query()

http://php.net/manual/en/mysqli.multi-query.php

来自链接的完整示例：

<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query  = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

/* execute multi query */
if ($mysqli->multi_query($query)) {
    do {
        /* store first result set */
        if ($result = $mysqli->store_result()) {
            while ($row = $result->fetch_row()) {
                printf("%s\n", $row[0]);
            }
            $result->free();
        }
        /* print divider */
        if ($mysqli->more_results()) {
            printf("-----------------\n");
        }
    } while ($mysqli->next_result());
}

/* close connection */
$mysqli->close();
?>
Procedural style

<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");

/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

$query  = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";

/* execute multi query */
if (mysqli_multi_query($link, $query)) {
    do {
        /* store first result set */
        if ($result = mysqli_store_result($link)) {
            while ($row = mysqli_fetch_row($result)) {
                printf("%s\n", $row[0]);
            }
            mysqli_free_result($result);
        }
        /* print divider */
        if (mysqli_more_results($link)) {
            printf("-----------------\n");
        }
    } while (mysqli_next_result($link));
}

/* close connection */
mysqli_close($link);
?>

Answer 3

如果您匹配两个查询中所选字段的名称，您也可以使用 UNION

http://dev.mysql.com/doc/refman/5.0/en/union.html

http://www.mysqltutorial.org/sql-union-mysql.aspx