我们要做一个查询是由6表数据联合显示的,现在有一个表1万多数据,每次刷新都要10多秒才显示,各位帮忙给点建议,怎么做优化好呢?
sql :
SELECT com_cn_user.real_name,com_cn_client.clShortName,com_cn_product.skuNum1,com_cn_product.Arrival_cycle,com_cn_product.Buy,com_cn_chuku_detail.id,com_cn_chuku_detail.sku,com_cn_product.ItemNum,com_cn_product.Color,com_cn_product.model,com_cn_product.Title_CN,com_cn_product.Brand,sum(com_cn_chuku_detail.quantity) as quantity,com_cn_chuku_detail.re
FROM com_cn_chuku
LEFT JOIN com_cn_chuku_detail ON com_cn_chuku.chukuNum = com_cn_chuku_detail.chukuNum
LEFT JOIN com_cn_product ON com_cn_chuku_detail.itemNum = com_cn_product.ItemNum
LEFT JOIN com_cn_supply ON com_cn_supply.syNum = com_cn_product.syNum
LEFT JOIN com_cn_user ON com_cn_user.usernum = com_cn_supply.usernum
LEFT JOIN com_cn_client ON com_cn_client.clNum = com_cn_chuku.clNum
where com_cn_chuku.state=2 and com_cn_chuku.submit_date between '2012-1-1' and '2012-06-15' group by com_cn_product.ItemNum ORDER BY Nullexplain:
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE com_cn_chuku ALL state NULL NULL NULL 177 Using where; Using temporary
1 SIMPLE com_cn_chuku_detail ref chukuNum chukuNum 4 com_backup.com_cn_chuku.chukuNum 47
1 SIMPLE com_cn_product ref ItemNum ItemNum 47 com_backup.com_cn_chuku_detail.itemNum 1
1 SIMPLE com_cn_supply ref syNum syNum 32 com_backup.com_cn_product.syNum 1
1 SIMPLE com_cn_user ref usernum usernum 38 com_backup.com_cn_supply.usernum 1
1 SIMPLE com_cn_client ref clNum clNum 32 com_backup.com_cn_chuku.clNum 2
sql :
SELECT com_cn_user.real_name,com_cn_client.clShortName,com_cn_product.skuNum1,com_cn_product.Arrival_cycle,com_cn_product.Buy,com_cn_chuku_detail.id,com_cn_chuku_detail.sku,com_cn_product.ItemNum,com_cn_product.Color,com_cn_product.model,com_cn_product.Title_CN,com_cn_product.Brand,sum(com_cn_chuku_detail.quantity) as quantity,com_cn_chuku_detail.re
FROM com_cn_chuku
LEFT JOIN com_cn_chuku_detail ON com_cn_chuku.chukuNum = com_cn_chuku_detail.chukuNum
LEFT JOIN com_cn_product ON com_cn_chuku_detail.itemNum = com_cn_product.ItemNum
LEFT JOIN com_cn_supply ON com_cn_supply.syNum = com_cn_product.syNum
LEFT JOIN com_cn_user ON com_cn_user.usernum = com_cn_supply.usernum
LEFT JOIN com_cn_client ON com_cn_client.clNum = com_cn_chuku.clNum
where com_cn_chuku.state=2 and com_cn_chuku.submit_date between '2012-1-1' and '2012-06-15' group by com_cn_product.ItemNum ORDER BY Nullexplain:
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE com_cn_chuku ALL state NULL NULL NULL 177 Using where; Using temporary
1 SIMPLE com_cn_chuku_detail ref chukuNum chukuNum 4 com_backup.com_cn_chuku.chukuNum 47
1 SIMPLE com_cn_product ref ItemNum ItemNum 47 com_backup.com_cn_chuku_detail.itemNum 1
1 SIMPLE com_cn_supply ref syNum syNum 32 com_backup.com_cn_product.syNum 1
1 SIMPLE com_cn_user ref usernum usernum 38 com_backup.com_cn_supply.usernum 1
1 SIMPLE com_cn_client ref clNum clNum 32 com_backup.com_cn_chuku.clNum 2
--
-- 表的结构 `com_cn_chuku`
--CREATE TABLE `com_cn_chuku` (
`chukuNum` int(11) NOT NULL auto_increment,
`usernum` varchar(12) NOT NULL,
`clNum` varchar(12) NOT NULL,
`Lead_single` varchar(15) NOT NULL,
`Lead_Name` varchar(15) NOT NULL,
`state` tinyint(1) NOT NULL,
`shengorder` tinyint(1) NOT NULL,
`submit_date` datetime NOT NULL,
`re` varchar(200) default NULL,
PRIMARY KEY (`chukuNum`),
KEY `usernum` (`usernum`),
KEY `clNum` (`clNum`),
KEY `state` (`state`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=236 ;
EXPLAIN SELECT sum( com_cn_chuku_detail.quantity ) AS quantity
FROM com_cn_chuku_detail
JOIN com_cn_chuku ON com_cn_chuku.chukuNum = com_cn_chuku_detail.chukuNum
WHERE com_cn_chuku.state =2
AND com_cn_chuku.submit_date
BETWEEN '2012-1-1'
AND '2012-06-15'
AND com_cn_chuku_detail.itemNum =1012441
GROUP BY Date( com_cn_chuku.submit_date )
ORDER BY NULL
刚刚建立联合索引。
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE com_cn_chuku ref PRIMARY,state state 1 const 118 Using where; Using temporary
1 SIMPLE com_cn_chuku_detail ref chukuNum,itemNum chukuNum 4 com_backup.com_cn_chuku.chukuNum 47 Using where
EXPLAIN SELECT sum( com_cn_chuku_detail.quantity ) AS quantity
FROM com_cn_chuku_detail
JOIN com_cn_chuku ON com_cn_chuku.chukuNum = com_cn_chuku_detail.chukuNum
WHERE com_cn_chuku.state =2
AND com_cn_chuku.submit_date
BETWEEN '2012-1-1'
AND '2012-06-15'
AND com_cn_chuku_detail.itemNum =1012441
GROUP BY Date( com_cn_chuku.submit_date )
ORDER BY NULL
com_cn_chuku_detail.itemNum =1012441没有加单引号,加了单引号,就OK了。