Question

下面是我的查询：

EXPLAIN SELECT
  SUM(rcr.impressions),
  SUM(rcr.clicks) AS clicks,
  cv.id AS cup_version_id,
  cv.source_id as source_id,
  rcr.date AS date,
  adg.subproduct_type_id
FROM
  report_custom_records AS rcr
    JOIN report_ad_groups AS adg ON (rcr.group_id = adg.ID)
    JOIN ad_campaigns AS cmp ON (adg.campaign_id = cmp.id)
    JOIN campaign_creatives AS cre ON (rcr.creative_id = cre.id)
    JOIN campaign_versions AS cv ON (cre.version_id = cv.id)
WHERE
    cmp.business_id IN (-1,9126,102538)
  AND adg.campaign_id IN (-1,870689,870696,884963,884964,902027,907809,914889,914893,925233,930390,930391,955423,955429,1004323,1004324,1021355,1021356,1078026,1078027)
  AND cast(rcr.date as date) BETWEEN '2018-03-01' AND '2018-10-31'
  AND ((adg.target_type LIKE "%Pre-Roll%"  AND adg.subproduct_type_id IN (2, 4)) OR adg.subproduct_type_id IN (12, 16 , 10 ))
  AND cv.source_id IS NULL
GROUP BY
  cup_version_id, date

如果我将其与日期条件（在date之间使用）一起使用，它将以11644969条记录的处理返回说明输出。但是，如果我不使用日期条件就使用它，它只会返回1584016条记录给我。

仅供参考： 日期字段具有日期数据类型表与联接一起使用，但没有外键

表格：

create table report_custom_records
(
    group_id         varchar(100) default '' not null,
    creative_id        int          default 0  not null,
    tp_creative_id     varchar(20)             not null,
    date               date                    not null,
    impressions        int(8)                  not null,
    clicks             int(8)                  not null,
    cost               float(6, 2)             not null,
    tp_creative_source smallint(6)             not null comment '0 = TD, 1 = DFA',
    primary key (adgroup_id, tp_creative_id, creative_id, date)
);

我在桌子上有下面的索引，这会减慢查询速度吗？

create index adg_id
    on report_creative_records (group_id, date);

create index group_id_2
    on report_creative_records (group_id, creative_id, date);

create index group_id_3
    on report_creative_records (group_id);

create index creative_id
    on report_creative_records (creative_id);

create index date
    on report_creative_records (date);

查询返回的条件之间没有日期的行少于直接选择的行

0 个答案: