SQLColumn[...] represents a column in an SQL table.
SQLServerLaunch[{name -> location, ...}] launches a database server that hosts access to the databases specified in the parameters.
GetJavaException[] returns the Java Exception object that was thrown in the most recent call from Mathematica to Java.
LoadedJavaObjects[] returns a list of the Java objects that have been sent to Mathematica (and not yet released with ReleaseJavaObject).
UseFrontEnd[expr] evaluates expr in an environment where the kernel can make use of the services of the notebook front end.
$FrontEndInitializationFunction is a function that you can assign to execute when the front end link is first established by ConnectToFrontEnd[].
MLINK getMathLink (WolframLibraryData libData) gets a MathLink connection to use for evaluations in Mathematica.
int MTensor_clone (MTensor f, MTensor *t) is a library callback function that puts a clone of f into *t.
mcomplex*MTensor_getComplexData (MTensor t) gets an array of the data elements of an MTensor of complex type.
mint*MTensor_getIntegerData (MTensor t) gets an array of the data elements of an MTensor of integer type.