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我有4個表如下,我想加入這些表,但查詢花了太長時間執行。請告訴我如何優化這個。 使用子查詢我正在基於輸入的日期範圍創建表試圖做下面多連接mysql查詢執行時間太長
1)
2)I需要以組結果基於銀行然後上區,然後通狀態,這樣我可以過濾結果在前端作爲國家 - >區 - >銀行
3)另外我需要避免一些垃圾數據,我正在使用不喜歡條款。
select substring(a.ifsc,1,4) as code,
s.new_state as state,
s.state_id as stid,
d.new_dist as dist,
b.ifbank as bank,
count(a.amt) as num,
sum(a.amt) as amt from
(SELECT * FROM mtr where orgdate between '$fdate_new' and '$tdate_new')
as a JOIN ifsc b on b.ifscd=a.ifsc
JOIN user c on a.excd=c.mtr
JOIN state_mapping s on b.state=s.org_state
JOIN dist_mapping d on b.dist=d.org_dist
where
s.state_id ='$stid' and
TRIM(d.new_dist) <> '' and
d.new_dist IS NOT NULL
group by bank,dist order by amt desc;
dist_mapping表
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| org_dist | varchar(20) | YES | | NULL | |
| new_dist | varchar(20) | YES | | NULL | |
+----------+-------------+------+-----+---------+-------+
IFSC表
+---------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| ifscd | varchar(11) | NO | PRI | | |
| ifscbr | varchar(40) | YES | | NULL | |
| ifbank | varchar(40) | YES | | NULL | |
| newifsc | varchar(11) | YES | | NULL | |
| dist | varchar(20) | YES | | NULL | |
| state | varchar(20) | YES | | NULL | |
+---------+-------------+------+-----+---------+-------+
state_mapping表
+-----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+-------------+------+-----+---------+-------+
| org_state | varchar(20) | YES | | NULL | |
| new_state | varchar(20) | YES | | NULL | |
| state_id | int(2) | YES | | NULL | |
+-----------+-------------+------+-----+---------+-------+
用戶表
+---------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| excode | int(2) | YES | | NULL | |
| mtr | int(2) | YES | | NULL | |
| exname | varchar(40) | YES | | NULL | |
| country | varchar(10) | YES | | NULL | |
+---------+-------------+------+-----+---------+-------+
mysql> desc mtr;
+---------+---------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+---------------------+------+-----+---------+-------+
| excd | int(2) | NO | PRI | 0 | |
| orgdate | date | YES | | NULL | |
| amt | double(12,2) | YES | | NULL | |
| obank | int(1) | YES | | NULL | |
| brcd | int(5) | YES | | NULL | |
| brname | varchar(40) | YES | | NULL | |
| rname | varchar(40) | YES | | NULL | |
| bname | varchar(40) | YES | | NULL | |
| baddr | varchar(60) | YES | | NULL | |
| mob | varchar(32) | YES | | NULL | |
| ifsc | varchar(12) | YES | | NULL | |
+---------+---------------------+------+-----+---------+-------+
還是查詢花費同一時間,我需要在任何列上創建索引? – Mani