整理数据需要准备的SQL语句
删除某些字段数据:
UPDATE table set mobile=NULL,phone=NULL,contactor=NULL,legal_person=NULL
删除没有电话的数据:
DELETE FROM alibaba WHERE LENGTH(mobile)<=10 AND LENGTH(phone)<=6
添加字段:
alter table MTO_POSTS add KEYWORDS varchar(50) after STATUS;
根据某个字段,删除单表重复数据:
DELETE FROM alibaba_new WHERE memberid IN (SELECT * FROM (SELECT memberid FROM alibaba_new GROUP BY memberid HAVING COUNT(memberid) > 1) t1)
AND Id NOT IN (SELECT * FROM (SELECT MIN(Id) FROM alibaba_new GROUP BY memberid HAVING COUNT(memberid) > 1) t2)
MYSQL把一张表的数据批量复制到另外一张表:
insert into alibaba_new_one select * from alibaba_new where company_url not LIKE 'https://www.1688.com%'
删除2个表的重复数据
delete from alibaba_new where memberid in (select memberid from alibaba)
新建表:
CREATE TABLE `alibaba_new_one` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`company_name` varchar(100) DEFAULT NULL,
`company_url` varchar(150) NOT NULL,
`memberid` varchar(50) DEFAULT NULL,
`is_cxt` varchar(20) DEFAULT NULL,
`contactor` varchar(50) DEFAULT NULL,
`phone` varchar(50) DEFAULT NULL,
`mobile` varchar(30) DEFAULT NULL,
`fax` varchar(30) DEFAULT NULL,
`address` varchar(150) DEFAULT NULL,
`product` varchar(255) DEFAULT NULL,
`business_scope` varchar(255) DEFAULT NULL,
`business_model` varchar(50) DEFAULT NULL,
`legal_person` varchar(50) DEFAULT NULL,
`reg_no` varchar(30) DEFAULT NULL,
`reg_date` varchar(30) DEFAULT NULL,
`company_type` varchar(20) DEFAULT NULL,
`update_on` datetime DEFAULT NULL,
`remark` varchar(10) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `index_url` (`company_url`) USING BTREE,
KEY `index_remark` (`remark`) USING BTREE,
KEY `index_memberid` (`memberid`) USING BTREE,
KEY `index_address` (`address`) USING BTREE
) ENGINE=MyISAM AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
把新表按注册日期排序插入新建的表:
insert into alibaba_new_bak(company_name,company_url,memberid,is_cxt,contactor,phone,mobile,fax,address,product,business_scope,business_model,legal_person,reg_no,reg_date,company_type,update_on,remark)
SELECT company_name,company_url,memberid,is_cxt,contactor,phone,mobile,fax,address,product,business_scope,business_model,legal_person,reg_no,reg_date,company_type,update_on,remark FROM alibaba_new ORDER BY reg_date DESC
把新表按网址类型插入新建的表:
insert into alibaba_new_one(company_name,company_url,memberid,is_cxt,contactor,phone,mobile,fax,address,product,business_scope,business_model,legal_person,reg_no,reg_date,company_type,update_on,remark)
SELECT company_name,company_url,memberid,is_cxt,contactor,phone,mobile,fax,address,product,business_scope,business_model,legal_person,reg_no,reg_date,company_type,update_on,remark FROM alibaba_new
where company_url not LIKE 'https://www.1688.com%'
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