访问 VBA：dao.recordset 与记录集有什么区别？

Question

In Access VBA is there a difference between:

Dim rs   As Recordset
Dim rs   As DAO.Recordset

Answer 1

It depends on the references you have set in the VBA project.

If you haven't changed anything, then there are only DAO recordsets. If there is no chance that ADO will ever be used in that project,

Dim rs As Recordset

is enough to specify a DAO.Recordset . But for clarity it is still recommended to use

Dim rs As DAO.Recordset

But if you have both the Access database engine, and ActiveX Data Objects libraries in your references (see on the right),

then you must use the qualifier to specify what recordset you want (see left). If you just use Dim rs As Recordset here, it will depend on the order of the references, which one is used.

Answer 2

The difference is, that also ADO has a Recordset. Using DAO makes it clear what the object is.