ACC2000: Can't Create Relationship with Multiple-Field Primary Key
ID: Q208353
|
The information in this article applies to:
Novice: Requires knowledge of the user interface on single-user computers.
SYMPTOMS
When you try to create a relationship that enforces referential integrity,
and the relationship involves a multiple-field primary key, you may receive
the following error:
No unique index found for referenced field of primary table.
CAUSE
The order of the primary key fields in Design view of the table is
different from the order of the fields in the PrimaryKey index.
RESOLUTION
There are two ways to work around this error:
- Reorder the PrimaryKey fields in the index so that they appear in the same order as they do in Design view of the table.
-or-
- Order the field names in the Relationships dialog box to match the order of the field names in the PrimaryKey index.
STATUS
Microsoft has confirmed this to be a problem in the Microsoft products listed
at the beginning of this article.
MORE INFORMATION
Steps to Reproduce Problem
Creating the Tables
- Create a new table in Design view.
- Add the following fields to the table:
Table:
------------------
Field Name: A
Data Type: Text
Field Name: B
Data Type: Text
- Highlight both fields.
- On the Edit menu, click Primary Key.
- On the View menu, click Indexes.
- Change the order of the fields in the PrimaryKey index so that B is in the first row, and A is in the second row:
Index Name Field Name Sort Order
------------------------------------
PrimaryKey B Ascending
A Ascending
- Close the Indexes dialog box.
- Save the table as tblOne and close it.
- Repeat steps 1 and 2.
- Save the table as tblTwo and close it. You do not need to create a
primary key index on this table.
Creating the Relationships
- Open the Relationships window by clicking Relationships on the Tools menu.
- On the Relationships menu, click Show Table. Add the tblOne table and the tblTwo table to the Relationships window.
- Highlight fields A and B in the tblOne table by holding down the SHIFT key while you click both fields, and then release the SHIFT key.
- Drag the highlighted fields A and B from the tblOne table to the tblTwo table to open the Relationships dialog box.
- Select fields A and B from the tblTwo table in the Related Table/Query column, so that the Relationships dialog box looks as follows:
Table/Query: tblOne Related Table/Query: tblTwo
-------------------------------------------------
A A
B B
- Click Enforce Referential Integrity.
- Click the Create button. Note that the error message appears.
- Click Cancel in the Relationships dialog box, and then close the Relationships window. You do not need to save your changes.
REFERENCES
For more information about referential integrity, click Microsoft Access Help on the
Help menu, type "What is Referential Integrity" in the Office Assistant or the Answer Wizard,
and then click Search to view the topic.
Additional query words:
index multiple field primary key prb pra
Keywords : kberrmsg kbdta RltRef
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbbug