Below is the full list of values for the ActiveQueryBuilderX.SQLSyntax property ("xs" constants).
Long aqbSyntax_xsAuto = 0x00000002
Long aqbSyntax_xsUniversal = 0x00000004

Long aqbSyntax_xsSQL89 = 0x00000001
Long aqbSyntax_xsSQL92 = 0x00000000
Long aqbSyntax_xsSQL2003 = 0x00000003

Long aqbSyntax_xsMSSQL7 = 0x0000000A
Long aqbSyntax_xsMSSQL2000 = 0x0000000B
Long aqbSyntax_xsMSSQL2005 = 0x0000000C
Long aqbSyntax_xsMSSQL2008 = 0x0000000D
Long aqbSyntax_xsMSSQL2012 = 0x0000000E

Long aqbSyntax_xsMySQL3 = 0x00000014
Long aqbSyntax_xsMySQL40 = 0x00000015
Long aqbSyntax_xsMySQL41 = 0x00000016
Long aqbSyntax_xsMySQL5 = 0x00000017

Long aqbSyntax_xsPGSQL = 0x0000001E

Long aqbSyntax_xsSQLite = 0x00000028

Long aqbSyntax_xsOracle7 = 0x00000032
Long aqbSyntax_xsOracle8i = 0x00000033
Long aqbSyntax_xsOracle9i = 0x00000034
Long aqbSyntax_xsOracle10g = 0x00000035
Long aqbSyntax_xsOracle11g = 0x00000036

Long aqbSyntax_xsInformixDS8 = 0x0000003C
Long aqbSyntax_xsInformixDS9 = 0x0000003D
Long aqbSyntax_xsInformixDS10 = 0x0000003E
Long aqbSyntax_xsInformixDS11 = 0x0000003f

Long aqbSyntax_xsJet3 = 0x00000046
Long aqbSyntax_xsJet4 = 0x00000047
Long aqbSyntax_xsAccess97 = 0x00000048
Long aqbSyntax_xsAccess2000 = 0x00000049
Long aqbSyntax_xsAccessXP = 0x0000004A
Long aqbSyntax_xsAccess2003 = 0x0000004B

Long aqbSyntax_xsFirebird1 = 0x00000050
Long aqbSyntax_xsFirebird1_5 = 0x00000051
Long aqbSyntax_xsFirebird2 = 0x00000052

Long aqbSyntax_xsInterbase = 0x0000005A

Long aqbSyntax_xsSybaseASA = 0x00000064
Long aqbSyntax_xsSybaseASE = 0x00000065

Long aqbSyntax_xsDB2 = 0x0000006E

Long aqbSyntax_xsTeradata = 0x00000078

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