What the best table design for item and it's serials ?

Question

I have Item's Table that hold Items meta data
what the solution in the case that i bought 500 Item (Ex: Hard Disk) within different serial no for each item
when  i save this serials will be in one to many ...
when i think in this solution i found that the table have serial no will be in 2 months about 500,000 record
is that best case or there is another solution ?
another one ,
If i have item with multiple colors
best case to save every item with its color as one item  (item_ID,Item_name ,Item_color,....)
or save item in table and colors in table ... and create table to obtain many to many relationship
what the best case and Fastest ?

Answer 1

I have Item's Table that hold Items meta data
what the solution in the case that i bought 500 Item (Ex: Hard Disk) within different serial no for each item
when  i save this serials will be in one to many ...
when i think in this solution i found that the table have serial no will be in 2 months about 500,000 record
is that best case or there is another solution ?
another one ,
If i have item with multiple colors
best case to save every item with its color as one item  (item_ID,Item_name ,Item_color,....)
or save item in table and colors in table ... and create table to obtain many to many relationship
what the best case and Fastest ?
1. I don't think there is any problem in having 1:N relation between ITEM and SERIAL table. That is how relational database works.
2. I will recomend you to use 1:N rather than N:M. For DML operation 1:N has minimum impact when compare to N:M. For instance if the item color field is added in the serial number table, i may need to update multiple rows however if i add the color code
field in item table then i may need to update or insert only one row.
------------------ RECOMENDATION
ITEM
 ITEM_ID int (PK)
 ITEM_NAME VARCHAR(50)
 ITEM_DESCRIPTION VARCHAR(100)
 ITEM_TYPE VARCHAR(10)
 ITEM_CATEGORY VARCHAR(10)
 ITEM_COLOR VARCHAR(10)
SERIAL
 ITEM_ID INT (FK)
 SERIAL_NUM VARCHAR(20) (UNIQUE)
Regards, RSingh