Question

I am new to SQL , I have been looking for on line resources but have not find anything yet to solve my problem. Basically i have three tables below:

 ORDERTBL(ORDERID,ORDERDATE,ORDERSTATUS),
 PRODUCT(PRODUCTID,PRODUCT_NAME),
 ORDERLINKPRODUCTS(ORDERID,PRODUCTID,QUANTITY,ORDERLINKPRODUCTID)

I want to get all the product name from the products tables for a specific order which i should query from ORDERLINKPRODUCTS since it contains all the orders.

for instance please find test data available in 3 tables:

Table ORDERTBL:

ORDERID=1,ORDERDATE= 24May, ORDERSTATUS=Process

Table PRODUCTS:

    PRODUCID =1  PRODUCT_NAME = spoon    PRODUCID =2  PRODUCT_NAME = soap

Table :ORDERLINKPRODUCTS:

ORDERID=1 PRODUCTID = 1 QUANTITY=3  ORDERLINKPRODUCTID=1    ORDERID=1 PRODUCTID = 2 QUANTITY=1  ORDERLINKPRODUCTID=2

I am trying to make a select statements that display all the product name of an order. For instance display all product name of orderid=1 which will return spoon,soap.

Any suggestion how to do it please?

Thanks in advance.

Answer 1

You should use JOIN keyword in SQL to join the three tables to be able to access PRODUCTNAME and show that table data. More about Join clause

SELECT prod.PRODUCT_NAME 
            FROM ORDERTBL ord 
            INNER JOIN ORDERLINKPRODUCTS link ON ord.ORDERID = link.ORDERID
            INNER JOIN PRODUCT prod ON link.PRODUCTID = prod.PRODUCTID  
            WHERE ord.ORDERID = 1

SQLfiddle Demo