ActiveX Data Objects (ADO):
ActiveX data objects is a Microsoft Application Programming Interface (API) in which the user has the ability of accessing both relational and non-relational data from both Microsoft and any other database providers.
Object Linking and Embedding for Database (OLE-DB):
Object linking and embedding for database is an API of Microsoft which is used for accessing the data of different format in a specified format. It has the ability to access the non-relational data.
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