Combine fields from multiple tables in Access query

microsoft accessquery

As an example, I have two queries in Access. The first outputs two columns: 

| Cust ID | Revenue 1 |
|    A    |     5     |
|    B    |    10     |

The second query is similar:

| Cust ID | Revenue 2 |
|    B    |     8     |
|    C    |     9     |

I want to create a query that will combine these first two queries:

| Cust ID | Revenue 1 | Revenue 2 |
|    A    |     5     |      0    |
|    B    |     10    |      8    |
|    C    |     0     |      9    |

But because A is not in the second query, and C is not in the first, this is the result I'm getting:

| Cust ID | Revenue 1 | Revenue 2 |
|    B    |     10    |      8    |

I have a master table of all Cust IDs that exist. How can I write a query that will enter 0 for any value not found (in this case, 0 for A,Rev 2 and C, Rev 1)?

Best Answer

What you are looking for is an Outer Join. The default is to do an Inner Join. This little question describes the difference very nicely:

https://stackoverflow.com/questions/38549/sql-difference-between-inner-and-outer-join/38578#38578

Of course, that depicts it with generic SQL - not sure how that relates to Access at all.

The Microsoft page for Outer Joins in Access is here: http://office.microsoft.com/en-us/access-help/creating-an-outer-join-query-in-access-HA001034555.aspx

It should tell you all you need to know.

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