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我有以下从表单获取数据的 PHP 代码，以及需要 15 分钟以上才能完成的 MySQL 查询。它需要更快。我想知道我是否忽略了使用 PHP 变量和 MySQL 查询的任何最佳实践，和/或查询结构本身是否对完成所需的不可接受的时间长度负责。

查询的基本目的是统计选民 PK 作为选票 FK 出现的次数，如果计数超过预定义的数量（百分比基于最终计算PHP 条件语句，以及过滤掉 2004 年以后所有内容的查询部分）。

voters 表有 100 万行，而 votes 表有 700 万行，两个 CountyEMSID 键都已编入索引，但是我不允许更改表结构，并且只能从中读取数据，而不会写入数据。任何有关如何加快速度的建议或建议将不胜感激！

另外，对这篇文章感到抱歉：P

/* ========== GET VALUES ========== */
if (isset($_GET["StreetName"])) { $searchStreetName = $_GET["StreetName"]; } else { $searchStreetName = "%"; }
if (isset($_GET["City"])) { $searchCity = $_GET["City"]; } else { $searchCity = "%"; }
if (isset($_GET["Zip"])) { $searchZip = $_GET["Zip"]; } else { $searchZip = "%"; }
if (isset($_GET["DOBY"])) { $searchDOBY = $_GET["DOBY"]; } else { $searchDOBY = "%"; }
if (isset($_GET["DOBM"])) { $searchDOBM = $_GET["DOBM"]; } else { $searchDOBM = "%"; }
if (isset($_GET["DOBD"])) { $searchDOBD = $_GET["DOBD"]; } else { $searchDOBD = "%"; }
if (isset($_GET["Gender"])) { $searchGender = $_GET["Gender"]; } else { $searchGender = "%"; }
if (isset($_GET["Party"])) { $searchParty = $_GET["Party"]; } else { $searchParty = "%"; }
if (isset($_GET["ED"])) { $searchED = $_GET["ED"]; } else { $searchED = "%"; }
if (isset($_GET["AD"])) { $searchAD = $_GET["AD"]; } else { $searchAD = "%"; }
if (isset($_GET["CD"])) { $searchCD = $_GET["CD"]; } else { $searchCD = "%"; }
if (isset($_GET["CO"])) { $searchCO = $_GET["CO"]; } else { $searchCO = "%"; }
if (isset($_GET["SD"])) { $searchSD = $_GET["SD"]; } else { $searchSD = "%"; }
if (isset($_GET["CC"])) { $searchCC = $_GET["CC"]; } else { $searchCC = "%"; }
if (isset($_GET["VoterActivity"])) { $searchVoterActivity = (($_GET["VoterActivity"] / 100) * 18); } else { $searchVoterActivity = "0"; }

/* ========== GET DATA ========== */
$sql = "SELECT voters.*, COUNT(votes.CountyEMSID) AS 'activity'
FROM voters INNER JOIN votes ON voters.CountyEMSID = votes.CountyEMSID
WHERE voters.StreetName LIKE '$searchStreetName%'
AND voters.City LIKE '$searchCity%'
AND voters.Zip LIKE '$searchZip%'
AND voters.DOBY LIKE '%$searchDOBY'
AND voters.DOBM LIKE '%$searchDOBM'
AND voters.DOBD LIKE '%$searchDOBD'
AND voters.Gender LIKE '$searchGender%'
AND voters.Party LIKE '$searchParty%'
AND voters.ED LIKE '%$searchED'
AND voters.AD LIKE '%$searchAD'
AND voters.CD LIKE '%$searchCD'
AND voters.CO LIKE '%$searchCO'
AND voters.SD LIKE '%$searchSD'
AND voters.CC LIKE '%$searchCC'
AND votes.ElectionDateY >= 2004
AND (
votes.ElectionType = 'GE'
OR votes.ElectionType = 'PR'
OR votes.ElectionType = 'PP'
)
GROUP BY votes.CountyEMSID
HAVING COUNT(votes.CountyEMSID) >= '$searchVoterActivity'
ORDER BY voters.LastName, voters.FirstName, voters.DOBY, voters.DOBM, voters.DOBD ASC
LIMIT $start, $limit";

/* ========== CREATE TABLE ========== */
CREATE TABLE voters (
    CountyEMSID varchar(9) NOT NULL,
    LastName varchar(30) NOT NULL,
    FirstName varchar(30) NOT NULL,
    MiddleInitial varchar(1) NOT NULL,
    NameSuffix varchar(4) NOT NULL,
    HouseNumber varchar(10) NOT NULL,
    HouseNumberSuffix varchar(10) NOT NULL,
    ApartmentNumber varchar(15) NOT NULL,
    StreetName varchar(50) NOT NULL,
    City varchar(40) NOT NULL,
    Zip varchar(5) NOT NULL,
    ZipCode4 varchar(4) NOT NULL,
    MailingAddress1 varchar(50) NOT NULL,
    MailingAddress2 varchar(50) NOT NULL,
    MailingAddress3 varchar(50) NOT NULL,
    MailingAddress4 varchar(50) NOT NULL,
    DOBY varchar(4) NOT NULL,
    DOBM varchar(2) NOT NULL,
    DOBD varchar(2) NOT NULL,
    Gender varchar(1) NOT NULL,
    Party varchar(3) NOT NULL,
    Other varchar(30) NOT NULL,
    ED varchar(3) NOT NULL,
    AD varchar(2) NOT NULL,
    CD varchar(2) NOT NULL,
    CO varchar(2) NOT NULL,
    SD varchar(2) NOT NULL,
    CC varchar(2) NOT NULL,
    RegY varchar(4) NOT NULL,
    RegM varchar(2) NOT NULL,
    RegD varchar(2) NOT NULL,
    Status varchar(2) NOT NULL,
    VoterType varchar(1) NOT NULL,
    StatusChangeY varchar(4) NOT NULL,
    StatusChangeM varchar(2) NOT NULL,
    StatusChangeD varchar(2) NOT NULL,
    LastVoted varchar(4) NOT NULL,
    Telephone varchar(12) NOT NULL,
    KEY CountyEMSID (CountyEMSID)
)

/* ========== CREATE TABLE ========== */
CREATE TABLE votes (
    CountyEMSID varchar(9) NOT NULL,
    County varchar(2) NOT NULL,
    AD varchar(2) NOT NULL,
    ED varchar(3) NOT NULL,
    Party varchar(3) NOT NULL,
    ElectionDateY varchar(4) NOT NULL,
    ElectionDateM varchar(2) NOT NULL,
    ElectionDateD varchar(2) NOT NULL,
    ElectionType varchar(2) NOT NULL,
    VoterType varchar(1) NOT NULL,
    KEY CountyEMSID (CountyEMSID)
)
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1 回答 1

3

表面上看起来很简单：您需要使用索引。我在您的架构转储中看不到任何内容。

于 2012-05-03T00:14:31.923 回答