How to join two sql tables when the common column has different names but information is the same in both tables

Question

Relatively new to SQL querying. I can successfully get results from a simple query that shows a customer number and a total dollars invoiced sorted highest dollar amount to lowest. I want to also display the customer name. The customer name, [Name], is in another table along with the customer number but the column name for customer number is different, ie. Table 1 is [Bill-to Customer No_] and Table 2 is just [No_]. How would I get the information from Table 2 to display in the same row with the customer number?

Answer 1

SELECT [Bill-to Customer No_], [Invoice Amount] AS amt, [Name]
FROM Table1 t1 JOIN Table2 t2
ON t1.[Bill-to Customer No_] = t2.[No_]
ORDER BY amt DESC;

I haven't grasped your column names yet, but hope you get the idea.

EDIT : (as per your new query)

SELECT [Sell-to Customer No_], [Name], SUM([Amount]) as "Total Dollars Spent" 
FROM [Table 1 - LIVE$Sales Invoice Line] a JOIN [Table 2 - LIVE$Customer] b
ON a.[Sell-to Customer No_] = b.[No_]
WHERE [Source Code] = 'RENTAL' and [Sell-to Customer No_] != 'GOLF' 
GROUP BY [Sell-to Customer No_], [Name]
ORDER BY SUM([Amount]) DESC;

You need to add [Name] to the GROUP BY clause as well. Remember you cannot SELECT a column that's not a part of GROUP BY unless it's being processed by a group function like [Amount] is being processed by SUM().

Answer 2

SELECT 
       [bill-to Customer No_]
       ,customer_name 
FROM table1 AS a 
INNER JOIN table2 AS b on a.[bill-to Customer No_]=b.No_