青云翻译

Contact more of a relational database, means of access (lowest layer), the sql server, my sql (middle layer) and orcale db2 (highest layer)

Comparison of relational database we contact more, referring to access (the Lowest layer), SQL Server, and my SQL (middle layer) and orcale, DB2 (Highest layer)

The relational database we contact quite many, refer is access (Lowest layer), sql server, my sql (middle layer) and orcale, DB2 (Highest layer)

The relational database we have contact with some more, this means that the access layer (Lowest), SQL Server, My SQL (middle layer), and orcale DB Highest layer (2)

Comparison of relational database we contact more, referring to access (the Lowest layer), SQL Server, and my SQL (middle layer) and orcale, DB2 (Highest layer)