There is. The common driver is ODBC, however even a common driver needs to be specific to the database you're interacting with. And SQL92 is a standard, namely ISO/IEC 9075:1992, see http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt
You might want to read Understanding Multidatabase APIs and ODBC
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There are two types of vessels, submarines and targets.
