About warehouse management system

Question

Hi All,
I want to make a small system managing our stocks in warehouse, but I don't know how to make a warehouse system, what table should I have?
I think I need to have at least:
. items
. inventory
and if one supplier sent some items to us, you know, the warehouse system is like a double record system, since stocks didn't get reased, it just moved from one place to another.
Any clue?
thanks.

Answer 1

Hi all,
I have created the following simple example for my problem, hope this will help you better understanding my situation, a little bit of explanation:
the business process is like this:
We have a warehouse which will hold all materials(items), some items we produced from raw material, some items we buy from suppliers, so I created an 'items' table for all the items we have. and then I created a 'stocks' table for current stock qty of each items, then I have created a 'stock_in' table, which will handle the input of stocks, maybe I can seperate that in type of table in different areas, like, for items purchased from outside, I will have a table purchase_stock_in table, which will against a table of purchase_orders, that is, if one supplier sent 100 item a, then stocks will increase by 100, and the purchase_orders related to that transcation will decrease by 100, if the purchase order qty is total 200, the we have a stock of 100, and remain 100 undelivered by our supplier. that is just an example, for items we produced by ourself, we can have another in type of table, let's say it is called an manufacturing_stock_in table, wich will against our production orders, if we have a production order total qty 300 for item b, make by work center A ( or dept A), then if they sent 100 in stocks, then stocks of b increased by 100, and production order related decreased by 100, the we have item b stock qty 100, and still 200 under production.
so the situation is stocks table, stock_in transactions( goods receipt), stock_out(goods_issue), simple enough. so I created the following tables:
CREATE TABLE  "ITEMS"
   (     "ITEM_ID" NUMBER(6,0) NOT NULL ENABLE,
     "ITEM_NO" VARCHAR2(30) NOT NULL ENABLE,
     "ITEM_NAME" VARCHAR2(100) NOT NULL ENABLE,
     "COLUMN1" VARCHAR2(20),
      CONSTRAINT "ITEMS_PK" PRIMARY KEY ("ITEM_ID") ENABLE,
      CONSTRAINT "ITEMS_ITEM_NO_UK1" UNIQUE ("ITEM_NO") ENABLE
CREATE TABLE  "STOCKS"
   (     "STOCK_ID" NUMBER(6,0) NOT NULL ENABLE,
     "ITEM_NO" VARCHAR2(30) NOT NULL ENABLE,
     "QTY" NUMBER(6,2),
     "UNIT" VARCHAR2(10),
     "LAST_UPDATE" DATE,
     "UPDATE_BY" VARCHAR2(30),
      CONSTRAINT "STOCKS_PK" PRIMARY KEY ("STOCK_ID") ENABLE,
      CONSTRAINT "STOCKS_ITEM_NO_UK1" UNIQUE ("ITEM_NO") ENABLE
CREATE TABLE  "STOCK_INS"
   (     "IN_DOC_ID" NUMBER(6,0) NOT NULL ENABLE,
     "ITEM_NO" VARCHAR2(30),
     "REF_DOC_NO" VARCHAR2(30),
     "QTY" NUMBER(6,2),
     "IN_DATE" DATE,
      CONSTRAINT "STOCK_INS_PK" PRIMARY KEY ("IN_DOC_ID") ENABLE,
      CONSTRAINT "STOCK_INS_UK1" UNIQUE ("ITEM_NO", "REF_DOC_NO", "IN_DATE") ENABLE
CREATE TABLE  "STOCK_OUTS"
   (     "OUT_DOC_ID" NUMBER(6,0) NOT NULL ENABLE,
     "ITEM_NO" VARCHAR2(30),
     "REF_DOC_NO" VARCHAR2(30),
     "QTY" NUMBER(6,2),
     "OUT_DATE" DATE,
      CONSTRAINT "STOCK_OUTS_PK" PRIMARY KEY ("OUT_DOC_ID") ENABLE,
      CONSTRAINT "STOCK_OUTS_UK1" UNIQUE ("ITEM_NO", "REF_DOC_NO", "OUT_DATE") ENABLE
ALTER TABLE  "STOCKS" ADD CONSTRAINT "STOCKS_ITEM_NO_FK1" FOREIGN KEY ("ITEM_NO")
       REFERENCES  "ITEMS" ("ITEM_NO") ENABLE;ALTER TABLE  "STOCK_INS" ADD CONSTRAINT "STOCK_INS_ITEM_NO_FK1" FOREIGN KEY ("ITEM_NO")
       REFERENCES  "ITEMS" ("ITEM_NO") ENABLE;my question is how to show the current stock_qty? that is, if I input 100 stocks, should I use a trigger deduct the purchase_order_qty, and increase the stocks qty?
how to do it? how to update the tables.
if there's one transaction, if I don't use any means of updating the underlying tables, let's say we have 3 tables in paper ledgers, then I will have to input this data manually in two places, that is for purchasing, I will have to input a transaction deducting the purchase_orders table. and then I input a record of this transaction by increasing the stocks table?
it is like you are transfering your money from account A to account B, any kind of software like Quicken will enable you to input in one place, then it will automatically showup in another place to, also true for deleting, updating, etc.
Should I use triggers or procedures implementing the insert/update/delete transactions of related two tables? how?
any clue?
Thanks!
Peter Yawei .Zhang
Edited by: Yawei Zhang on Aug 12, 2011 9:58 PM
Edited by: BluShadow on 12-Aug-2011 15:06
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