INSERT INTO ....多行......在重复键

Question

我有一个网站的电子商务网站有一个价格表，看起来像这样一个MySQL数据库：

priceid (int, PK, AI) 
productid (int) 
membershipid (int) 
price (decimal(12,2)) 
quantity (int) 

这使得项目有不同程度的的定价要么基于membershipid或quantity（但这里的价值将永远是1）。

我需要与源表中更新此类似：

productid (int,PK) 
price1 (int) 
price2 (int) 
price3 (int) 

我不知道如何插入数据：

COLS:[productid, price, membershipid, quantity][priceid] 
ROWS:[productid, price1, 1, 1][n] 
ROWS:[productid, price2, 2, 1][n] 
ROWS:[productid, price3, 5, 1][n] 

（ N =新插入的ID，或PK更新，如果它已经存在）

我知道下面的代码将无法正常工作，但基本上，我需要做的是这样的：

INSERT INTO mysql.pricing 
    (prouductid, membershipid, quantity, price) 
SELECT productid, 1, 1, price1 from mysql.source 'row n 
SELECT productid, 2, 1, price2 from mysql.source 'row n+1 
SELECT productid, 5, 1, price3 from mysql.source 'row n+2 
ON DUPLICATE KEY UPDATE productid = VALUES(productid),membershipid = VALUES(membership), quantity = VALUES(quantity), price = VALUES(price); 

我需要三个不同的行，每行都有相同的[productid]，但不同[priceid，membershipid，price]。

我已经搜索了答案，一直在桌子上撞了我的头几天。 任何想法？任何帮助将大大赞赏。

Answer 1

You have mentioned priceid (int, PK, AI)- You can use on duplicate key update in  primary key but not on Auto Increment. 

There are two ways to solve this: 
Remove only Auto Increment from priceid and set the field as  (productid,membershipid,pricenumber) eg: 
Membershipid = 2 
productid = 33 
price1 = 11 
price2 = 12 
price3 = 13 
**priceid will be** 
33211 (price 1) 
33212 (price 2) 
33213 (price 3) 

This will always be unique...(for primary key), updating the following info. 
for memebershipid 2 , productid 33, price1 = 25, price2 = 28, price3 = 30 

insert will be as follows (priceid,membershipid,productid,price,quantity) 

replace into mysql.pricing values(33211,33,2,25,1);
replace into mysql.pricing values(33222,33,2,28,1);
replace into mysql.pricing values(33233,33,2,30,1);

if the price2 has been changed from 28 to 29 you insert statment will be like this. 

replace into mysql.pricing values(33222,33,2,29,1);

(using replace instead of insert for update incase of already existing primary key) 

or 

other way is add another column in you mysql.pricing table with datetime, and priceid  will be primarykey & autoincrement 

mysql table columns 
priceid (int, PK, AI),productid (int),membershipid (int) price(decimal(12,2)),quantity  (int),insert_date (datetime) 

Above insert can be inserted as following using now() function (which returns current  date& time) 

insert into mysql.pricing values(33,2,25,1,now());
insert into mysql.pricing values(33,2,28,1,now());
insert into mysql.pricing values(33,2,30,1,now());

updating price2 (it will always be insert) 

insert into mysql.pricing values(33,2,29,1,now());

make all fetch result based on max insert_date(datetime field) for respective  membershipid,price1/price2.. 
Hope this solves your problem.