Page "Object-relational impedance mismatch" Paragraph 30

Some, however, would point out that this contention is moot due to the fact that: ( 1 ) RDBMSes were never intended to facilitate object modelling, and ( 2 ) SQL generally should only be seen as a " lossy " or " inefficient " interface language when one is trying to achieve a solution for which RDBMSes were not designed.

SQL is very efficient at doing what it was designed to do, namely, to query, sort, filter, and store large sets of data.

Some would additionally point out that the inclusion of OO language functionality in the back-end simply facilitates bad architectural practice, as it admits high-level application logic into the data tier, antithetical to the RDBMS.