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The JDBC API provides a call-level API for SQL-based database access.
JDBC technology allows you to use the Java programming language to exploit "Write Once, Run Anywhere" capabilities for applications that require access to enterprise data.
There are options to change this behavior such that While SQLAlchemy directly supports emitting CREATE and DROP statements for schema constructs, the ability to alter those constructs, usually via the ALTER statement as well as other database-specific constructs, is outside of the scope of SQLAlchemy itself.
While it’s easy enough to emit ALTER statements and similar by hand, such as by passing a string to construct, it’s a common practice to automate the maintenance of database schemas in relation to application code using schema migration tools.
The section below highlights the key JDBC features of 12c.