Extensions to SQL Standards The XML driver uses SQL grammar that is compliant with entry level ANSI SQL-92. The following table summarizes significant extensions to the grammar. Table 64. SQL Extensions Entry Level ANSI SQL-92 Extension Relevant Standard or Convention Aliasing table references Intermediate level ANSI SQL-92 ANSI date, time, and timestamp literals Intermediate level ANSI SQL-92 Dynamic parameter specification Full level ANSI SQL-92 GUID literals COM Hex string literals Full level ANSI SQL-92 Left Outer Joins Intermediate level ANSI SQL-92 ODBC escape support ODBC 3.0 Scalar functions ODBC 3.0