查詢花費過多時間與惱怒性能

Question

1. 我的查詢花費很長的時間1小時左右
2. 它影響着數據庫的性能。
3. 即使解釋計劃也需要很長時間。
4. 請重寫查詢以獲得最佳性能。

查詢：

SELECT Count(*) 
FROM (SELECT paid.keyword_id, 
       paid.keyword_name, 
       stat.orgentrances, 
       keyword.rank1, 
       keyword.rank_check, 
       Sum(paid.clicks)          AS sumclick, 
       Sum(paid.clicks * paid.avg_position)     AS 
       sumclickavgpos, 
       Sum(paid.itemrevenue)        AS sumitem, 
       Sum(paid.cost)          AS sumcost, 
       Sum(paid.transactions)        AS sumtrans, 
       Sum(paid.impressions)        AS 
       sumimpress, 
       IF(Sum(paid.impressions) = 0, 0, Sum(
       paid.impressions * paid.avg_position)/Sum 
               (paid.impressions)) AS 
         sumimpressavgrank, 
       con.item_revenue, 
       con.transactions, 
       keyword.monthly_search_volume 
     FROM `t_keyword_paid_analytics_google_ib` paid 
       LEFT JOIN (SELECT outer_t.keyword_id, 
           Sum(outer_t.item_revenue) AS item_revenue, 
           Sum(outer_t.transactions) AS transactions 
          FROM t_keyword_conversion_ga_ib outer_t 
          WHERE outer_t.own_domain_id = 720 
           AND outer_t.traffic_date >= '2012-12-01' 
           AND outer_t.traffic_date <= '2012-12-31' 
          GROUP BY outer_t.keyword_id) con 
         ON paid.keyword_id = con.keyword_id 
       LEFT JOIN (SELECT outer_t.keyword_id, 
           Sum(outer_t.entrances) AS orgEntrances 
          FROM t_keyword_stat_ga_ib outer_t 
          WHERE outer_t.own_domain_id = 720 
           AND outer_t.traffic_date >= '2012-12-01' 
           AND outer_t.traffic_date <= '2012-12-31' 
           AND (outer_t.medium = 'organic' 
             OR outer_t.medium IS NULL) 
          GROUP BY outer_t.keyword_id) stat 
         ON paid.keyword_id = stat.keyword_id 
       LEFT JOIN `t_managed_keyword_ib` keyword 
         ON keyword.id = paid.keyword_id 
     WHERE paid.own_domain_id = 720 
       AND paid.traffic_date >= '2012-12-01' 
       AND paid.traffic_date <= '2012-12-31' 
       AND (paid.channel IS NULL 
         OR paid.channel = 'Google') 
     GROUP BY paid.keyword_id 
    HAVING paid.keyword_id IS NOT NULL) tempt; 

(outer_t.medium = 'organic' or outer_t.medium is null) after outer_t.own_domain_id = 720 and (paid.channel is null or paid.channel = 'Google') 
after paid.own_domain_id = 720 

表結構：

mysql> show create table t_keyword_paid_analytics_google_ib\G 
*************************** 1. row *************************** 
Table: t_keyword_paid_analytics_google_ib 
Create Table: CREATE TABLE `t_keyword_paid_analytics_google_ib` (
`keyword_name` varchar(255) DEFAULT NULL, 
`id` int(11) NOT NULL, 
`keyword_id` int(11) NOT NULL, 
`target_url_id` int(11) DEFAULT NULL, 
`own_domain_id` int(11) NOT NULL, 
`log_date` date NOT NULL, 
`traffic_date` date NOT NULL, 
`impressions` int(11) DEFAULT NULL, 
`clicks` int(11) DEFAULT NULL, 
`entrances` int(11) DEFAULT NULL, 
`match_type` int(11) DEFAULT NULL COMMENT '1: Phrase, 2: Exact, 3:Broad 4: etc', 
`ad_group_name` varchar(200) DEFAULT NULL, 
`ad_distribution_network` varchar(500) CHARACTER SET latin1 DEFAULT NULL, 
`match_query` varchar(500) CHARACTER SET latin1 DEFAULT NULL, 
`cost` decimal(10,2) DEFAULT NULL, 
`cpm` decimal(10,2) DEFAULT NULL, 
`ctr` decimal(10,2) DEFAULT NULL COMMENT 'percent', 
`cpc` decimal(10,2) DEFAULT NULL, 
`campaign` varchar(200) CHARACTER SET latin1 DEFAULT NULL, 
`keyword_status` tinyint(4) DEFAULT NULL COMMENT '1: Active,2: Approved, 3: Disapproved, 4: Paused , 5:Pending, 6: Failed, 7:etc', 
`ad_group_status` tinyint(4) DEFAULT NULL COMMENT '1:ELIGIBLE; 2=PAUSED;3=LOW_SEARCH_VOLUME;4 =LOW_QUALITY_SCORE; 5=DISAPPROVED; 6=AD_GROUP_PAUSED; 7=etc', 
`max_cpc` decimal(10,2) DEFAULT NULL, 
`quality_score` tinyint(4) DEFAULT NULL, 
`channel` varchar(100) DEFAULT NULL, 
`first_page_cpc` decimal(10,2) DEFAULT NULL, 
`avg_position` decimal(10,2) DEFAULT NULL, 
`itemRevenue` decimal(10,2) DEFAULT NULL, 
`goal1value` decimal(10,2) DEFAULT NULL, 
`goal2value` decimal(10,2) DEFAULT NULL, 
`goal3value` decimal(10,2) DEFAULT NULL, 
`goal4value` decimal(10,2) DEFAULT NULL, 
`transactions` int(10) DEFAULT NULL, 
`goal1completions` int(10) DEFAULT NULL, 
`goal2completions` int(10) DEFAULT NULL, 
`goal3completions` int(10) DEFAULT NULL, 
`goal4completions` int(10) DEFAULT NULL 
) ENGINE=BRIGHTHOUSE DEFAULT CHARSET=utf8 
1 row in set (0.00 sec) 

mysql> show create table t_keyword_conversion_ga_ib\G 
*************************** 1. row *************************** 
Table: t_keyword_conversion_ga_ib 
Create Table: CREATE TABLE `t_keyword_conversion_ga_ib` (
`keyword_name` varchar(255) COLLATE latin1_bin DEFAULT NULL, 
`id` int(11) NOT NULL, 
`own_domain_id` int(11) DEFAULT NULL, 
`keyword_id` int(11) DEFAULT NULL, 
`traffic_date` date DEFAULT NULL, 
`targeturl_id` int(11) DEFAULT NULL, 
`entrance` int(11) DEFAULT NULL, 
`transactions` int(11) DEFAULT NULL, 
`item_revenue` decimal(9,2) DEFAULT NULL, 
`goal1completions` int(11) DEFAULT NULL, 
`goal2completions` int(11) DEFAULT NULL, 
`goal3completions` int(11) DEFAULT NULL, 
`goal4completions` int(11) DEFAULT NULL, 
`goal5completions` int(11) DEFAULT NULL, 
`goal6completions` int(11) DEFAULT NULL, 
`goal7completions` int(11) DEFAULT NULL, 
`goal8completions` int(11) DEFAULT NULL, 
`goal9completions` int(11) DEFAULT NULL, 
`goal10completions` int(11) DEFAULT NULL, 
`goal1Value` decimal(9,2) DEFAULT NULL, 
`goal2Value` decimal(9,2) DEFAULT NULL, 
`goal3Value` decimal(9,2) DEFAULT NULL, 
`goal4Value` decimal(9,2) DEFAULT NULL, 
`goal5Value` decimal(9,2) DEFAULT NULL, 
`goal6Value` decimal(9,2) DEFAULT NULL, 
`goal7Value` decimal(9,2) DEFAULT NULL, 
`goal8Value` decimal(9,2) DEFAULT NULL, 
`goal9Value` decimal(9,2) DEFAULT NULL, 
`goal10Value` decimal(9,2) DEFAULT NULL, 
`medium` varchar(255) COLLATE latin1_bin DEFAULT NULL, 
`source` varchar(255) COLLATE latin1_bin DEFAULT NULL 
) ENGINE=BRIGHTHOUSE DEFAULT CHARSET=latin1 COLLATE=latin1_bin 
1 row in set (0.00 sec) 

請幫我在這裏。

Answer 1

您不指示任何索引。你需要他們來提高性能。

好的，我不明白分號後的部分，所以我會忽略它。

您的整個查詢都會執行一個子選擇的計數（*），但是您在子查詢（調用SUM）中做了一堆聚合，這是數據庫不需要做的工作，所以消除。

你在進一步的子查詢中做了聚合，所以把它剪掉了。

在您的主要子選擇中，您只需執行一個計數（*），您可以選擇不在您組中的字段，這對數據庫不起作用，因此不會影響計數。那。

這使我們像...

select count(*) 
from (select paid.keyword_id 
     from `t_keyword_paid_analytics_google_ib` paid 
     left join 
      (select outer_t.keyword_id 
      from t_keyword_conversion_ga_ib outer_t 
      where ... 
      group by outer_t.keyword_id ) con 
      on paid.keyword_id = con.keyword_id 
     left join 
      (select outer_t.keyword_id 
      from t_keyword_stat_ga_ib outer_t 
      where ... 
      group by outer_t.keyword_id) stat on paid.keyword_id = stat.keyword_id 
     left join `t_managed_keyword_ib` keyword on keyword.id = paid.keyword_id 
    where ... 
    group by paid.keyword_id 
    having paid.keyword_id is not null 
    ) tempt; 

此外，計數可能比選擇更快，你似乎在尋找keyword_id並最終對其計數。如果你能像你一樣算得上，那會比選擇更好。我不確定您是否可以將此應用於此查詢，但請牢記。

Answer 2

你有一些索引添加到您的表，

ALTER TABLE table_name ADD UNIQUE INDEX cate_id(field_name); 

這裏是documentation

在你的情況我想補充索引：因爲你正在參加

paid.keyword_id 
con.keyword_id 
stat.keyword_id 
keyword.id 
paid.keyword_id 

on這些字段