DbType映射关系

                        
AnsiString:VarChar
Binary:VarBinary
Byte:TinyInt
Boolean:Bit
Currency:Money
Date:DateTime
DateTime:DateTime
Decimal:Decimal
Double:Float
Guid:UniqueIdentifier
Int16:SmallInt
Int32:Int
Int64:BigInt
Object:Variant
Single:Real
String:NVarChar
Time:DateTime
AnsiStringFixedLength:Char
StringFixedLength:NChar
Xml:Xml
DateTime2:DateTime2
DateTimeOffset:DateTimeOffset

\DataBase\SqlServer\SqlMapping.cs
GetDBType
DatatypeMap.cfg
ValueType
\AiExpressionTurn\Base\AiExpressionWriterSql.cs
VisitConstant