SELECT and list children and parent - alternative [duplicate] - mysql

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Closed 10 years ago.
Possible Duplicate:
SELECT and list children and parent
I received this answer from xception:
https://stackoverflow.com/a/12770593/445820
Unfortunately, GROUP_CONCAT isn't the solution for me and the other question is too extended, therefore I am re-asking this question.
I need an alternative to that query with subqueries. Since I'm not good enough with queries, this task is beyond my abilities too.
Help please.
Here is the code:
// Prepare query
$columns = "c.rule_id, c.rule_title, GROUP_CONCAT(r.rule_description ORDER BY r.rule_position ASC SEPARATOR '~sep~') AS rule_desc, ";
$columns .= "GROUP_CONCAT(r.parse_bbcode ORDER BY r.rule_position ASC SEPARATOR '~sep~') AS bbcode, ";
$columns .= "GROUP_CONCAT(r.parse_links ORDER BY r.rule_position ASC SEPARATOR '~sep~') AS links, ";
$columns .= "GROUP_CONCAT(r.parse_smilies ORDER BY r.rule_position ASC SEPARATOR '~sep~') AS smilies";
$sql_array = array(
'SELECT' => $columns,
'FROM' => array(RULES_TABLE => 'c'),
'LEFT_JOIN' => array(
array(
'FROM' => array(RULES_TABLE => 'r'),
'ON' => 'r.parent_id = c.rule_id',
),
),
'WHERE' => 'c.parent_id = 0 AND r.public = 1',
'GROUP_BY' => 'c.rule_id',
'ORDER_BY' => 'c.cat_position',
);
$sql = $db->sql_build_query('SELECT', $sql_array);
$result = $db->sql_query($sql);
$cat_count = 1;
$alpha_count = 'abcdefghijklmnopqrstuvwxyz';
while ($row = $db->sql_fetchrow($result))
{
$template->assign_block_vars('rules', array(
'RULE_CATEGORY' => $row['rule_title'],
'ROW_COUNT' => $cat_count,
));
$rules_ary = explode('~sep~', $row['rule_desc']);
$parse_bbcode = explode('~sep~', $row['bbcode']);
$parse_links = explode('~sep~', $row['links']);
$parse_smilies = explode('~sep~', $row['smilies']);
$counter = 0;
foreach ($rules_ary as $key => $rule)
{
$uid = $bitfield = $options = '';
generate_text_for_storage($rule, $uid, $bitfield, $options, $parse_bbcode[$key], $parse_links[$key], $parse_smilies[$key]);
$template->assign_block_vars('rules.rule', array(
'RULE_DESC' => generate_text_for_display($rule, $uid, $bitfield, $options),
'ALPHA_COUNT' => $alpha_count{$counter},
));
$counter++;
}
$cat_count++;
}
$db->sql_freeresult($result);
Some of the functions might be unknown to you. FYI this is phpBB related code.
Sorry for not adding the code in the first time.

Answer 1

// Prepare query
$columns = "c.rule_id, c.rule_title, r.rule_description AS rule_desc, ";
$columns .= "r.parse_bbcode AS bbcode, ";
$columns .= "r.parse_links AS links, ";
$columns .= "r.parse_smilies AS smilies";
$sql_array = array(
'SELECT' => $columns,
'FROM' => array(RULES_TABLE => 'c'),
'LEFT_JOIN' => array(
array(
'FROM' => array(RULES_TABLE => 'r'),
'ON' => 'r.parent_id = c.rule_id',
),
),
'WHERE' => 'c.parent_id = 0 AND r.public = 1',
'ORDER_BY' => 'c.cat_position',
);
$sql = $db->sql_build_query('SELECT', $sql_array);
$result = $db->sql_query($sql);
$cat_count = 0;
$alpha_count = 'abcdefghijklmnopqrstuvwxyz';
$prev_rule_id = 0;
$r_rule_titles = array();
$rule_id = null;
while ($row = $db->sql_fetchrow($result))
{
if( $rule_id != $row['rule_id'] ) {
$rule_id = $row['rule_id'];
$cat_count++;
$counter = 0;
$template->assign_block_vars('rules', array(
'RULE_CATEGORY' => $row['rule_title'],
'ROW_COUNT' => $cat_count,
));
}
$uid = $bitfield = $options = '';
generate_text_for_storage($row['rule_desc'], $uid, $bitfield, $options, $row['bbcode'], $row['links'], $row['smilies']);
$template->assign_block_vars('rules.rule', array(
'RULE_DESC' => generate_text_for_display($row['rule_desc'], $uid, $bitfield, $options),
'ALPHA_COUNT' => $alpha_count{$counter},
));
$counter++;
}
$db->sql_freeresult($result);