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Editorial Team
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Asked: 2026-05-27T10:30:38+00:00

I need to Join 3 tables in SQL Server. Those 3 tables have basically

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I need to Join 3 tables in SQL Server. Those 3 tables have basically this schema:

   Users                Items                     UsersItems
+--------+    +--------+-------------+    +--------+--------+-------+
| UserID |    | ItemID | Description |    | UserID | ItemId | Value |
+--------+    +--------+-------------+    +--------+--------+-------+
|   1    |    |   1    |    desc1    |    |   1    |    1   |   1   |
|   2    |    |   2    |    desc2    |    |   1    |    2   |   2   |
|  ...   |    |  ...   |    desc3    |    |   2    |    2   |   1   |
|   n    |    |   n    |    desc4    |    |   n    |    1   |   1   |
+--------+    +--------+-------------+    +--------+--------+-------+

As you can see both Users and Items can grow indefinitely and UsersItems is used to express the relation between those two, also including a Value column.

I need a query to retrieve all users, and for each user I need all the items with it’s corresponding Value.

If the relation doesn’t exist in UsersItems then Null (or a default value) should be returned for that row’s Value column.

The expected query result should be:

             ResultSet
    +--------+--------+-------+
    | UserID | ItemID | Value |
    +--------+--------+-------+
    |   1    |   1    |   1   |
    |   1    |   2    |   2   |
    |   1    |   n    |  NULL |
    |   2    |   1    |  NULL |
    |   2    |   2    |   1   |
    |   2    |   n    |  NULL |
    |   n    |   1    |   1   |
    |   n    |   n    |  NULL |
    +--------+--------+-------+
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1 Answer

  1. Editorial Team

    Okay, since there are several answers that I think aren’t correct, I’ll post what I think the answer is:

    SELECT Users.UserID,
       Items.Description,
       UsersItems.Value
FROM
       Users
CROSS JOIN
       Items
LEFT JOIN
       UsersItems
ON
       Users.UserID = UsersItems.UserID
AND
       Items.ItemID = UsersItems.ItemID

    I’m inferring from your comment about nulls that you want to see all Items againsts all Users, with the Value from the UsersItems table where it exists.

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