在ms访问中获取表的外键约束列表

Question

我正在尝试使用关系窗口来查看MS Access数据库中表之间的关系。我隐藏了所有其他表，并在其中一个表中发现了一个外键，它看起来应该链接到另一个表，其中有一个主键——我需要追踪的信息。

有没有办法在Access中列出表上现有的外键约束，就像MySQL中的SHOW CREATE table语法一样？

Answer 1

DAO和ADOSchemas中的tabledef集合将显示外键。

Dim tdf As TableDef
Dim db As Database
Dim ndx As Index
Set db = CurrentDb
For Each tdf In db.TableDefs
    For Each ndx In tdf.Indexes
        If ndx.Foreign = True Then
            Debug.Print tdf.Name, ndx.Name
            For Each fld In ndx.Fields
                Debug.Print fld.Name
            Next
        End If
    Next
Next

关系

Dim rel As DAO.Relation
Dim db As Database
Set db = CurrentDb
For Each rel In db.Relations
    Debug.Print rel.Name, rel.ForeignTable
    For Each fld In rel.Fields
        Debug.Print fld.Name
    Next
Next

ADOSchema

Dim cn As ADODB.Connection
Dim rs As ADODB.Recordset
Set cn = CurrentProject.Connection
Set rs = cn.OpenSchema(adSchemaForeignKeys)
Do While Not rs.EOF
    For i = 0 To rs.Fields.Count - 1
        Debug.Print rs.Fields(i).Name & ":- " & rs.Fields(i)
    Next
    rs.MoveNext
Loop

最后，还有一个隐藏的系统表：

SELECT * FROM MSysRelationships