Why is my SQL query for months and year so slow? - php

Question

I have about 4000 dates in my database table. From this data I would need the total count that has the same month and year in an array with year and the month and total result. The array must look like this: $ year ['year'] [strftime ('% Y', $ application ['crdate'])] ['month'] [$ i] = intval ($ application ['erg']);
Rendered like that example:
[year, month jan (01), month feb (02), ...]
With data:
[2016, 0, 0, 0, 4, 0, 9, 0, 0, 0, 0, 0, 2]
I have the following code to do this, but it needs to load forever with 4000 records. Why is it so slow and how can I speed it up?
$year = array();
$where_month = false;
if($this->request->hasArgument('time')) {
$von = $this->request->getArgument('time')['von'];
$bis = $this->request->getArgument('time')['bis'];
$von_jahr = strftime('%Y',strtotime($von));
$bis_jahr = strftime('%Y',strtotime($bis));
$von_englisch_format = strftime('%Y-%m-%d',strtotime($von));
$bis_englisch_format = strftime('%Y-%m-%d',strtotime($bis));
$von_stamp = strtotime($von);
$bis_stamp = strtotime($bis);
$where_month = true;
}
for($i = 1; $i <= 12; $i++) {
if ($i <= 9) {
$i = '0' . $i;
}
$select_fields = 'T1.*';
$from_table = ' datas T1';
if($where_month) {
$where_clause = 'DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%Y") >= "'.$von_jahr.'" AND DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%Y") <= "'.$bis_jahr.'"';
} else {
$where_clause = '';
}
$groupBy = '';
$orderBy = 'crdate ASC';
$limit = '';
$erg = 0;
$result = $GLOBALS['TYPO3_DB']->exec_SELECTquery($select_fields, $from_table, $where_clause, $groupBy, $orderBy, $limit);
foreach($result as $bewerbung) {
$year['jahr'][strftime('%Y', $bewerbung['crdate'])]['monat'][$i] = 0;
$select_fields = '*, count(*) AS erg';
$from_table = ' datas T1';
if($where_month == false) {
$where_clause = 'DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%Y") = "' . strftime('%Y', $bewerbung['crdate']) . '" AND DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "' . $i . '"';
} else {
$where_clause = '(DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%Y-%m-%d") BETWEEN "'.$von_englisch_format.'" AND "'.$bis_englisch_format.'") AND DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%Y") = "' . strftime('%Y', $bewerbung['crdate']) . '" AND DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "' . $i . '"';
}
$groupBy = '';
$orderBy = 'crdate ASC';
$limit = '';
$result = $GLOBALS['TYPO3_DB']->exec_SELECTquery($select_fields, $from_table, $where_clause, $groupBy, $orderBy, $limit);
foreach ($result as $bewerbung) {
if (intval($bewerbung['erg']) >= 1) {
$year['jahr'][strftime('%Y', $bewerbung['crdate'])]['monat'][$i] = intval($bewerbung['erg']);
}
}
}
}

Answer 1

my new solution looks like this:
$select_fields = 'T1.*, DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%Y") AS "jahr",
COUNT( CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "01"
THEN 1
ELSE NULL
END
) AS "januar",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "02"
THEN 1
ELSE NULL
END
) AS "februar",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "03"
THEN 1
ELSE NULL
END
) AS "maerz",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "04"
THEN 1
ELSE NULL
END
) AS "april",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "05"
THEN 1
ELSE NULL
END
) AS "mai",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "06"
THEN 1
ELSE NULL
END
) AS "juni",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "07"
THEN 1
ELSE NULL
END
) AS "juli",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "08"
THEN 1
ELSE NULL
END
) AS "august",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "09"
THEN 1
ELSE NULL
END
) AS "september",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "10"
THEN 1
ELSE NULL
END
) AS "oktober",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "11"
THEN 1
ELSE NULL
END
) AS "november",
COUNT(
CASE
WHEN DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%m") = "12"
THEN 1
ELSE NULL
END
) AS "dezember"';
$from_table = ' tx_lemmbewerberportal_domain_model_bewerbungen T1';
$where_clause = '';
$groupBy = 'DATE_FORMAT(FROM_UNIXTIME(T1.crdate), "%Y")';
$orderBy = 'crdate ASC';
$limit = '';
$erg = 0;
$result = $GLOBALS['TYPO3_DB']->exec_SELECTquery($select_fields, $from_table, $where_clause, $groupBy, $orderBy, $limit);
$i = 0;
foreach ($result as $row) {
$year[$i]['jahr'] = $row['jahr'];
$year[$i]['01'] = $row['januar'];
$year[$i]['02'] = $row['februar'];
$year[$i]['03'] = $row['maerz'];
$year[$i]['04'] = $row['april'];
$year[$i]['05'] = $row['mai'];
$year[$i]['06'] = $row['juni'];
$year[$i]['07'] = $row['juli'];
$year[$i]['08'] = $row['august'];
$year[$i]['09'] = $row['september'];
$year[$i]['10'] = $row['oktober'];
$year[$i]['11'] = $row['november'];
$year[$i]['12'] = $row['dezember'];
$i++;
}
return $year;
Within a second, the data is loaded. Thank you anyway. :-)