Multiple Select with .NET

Hi, i need query a batch of multiple Select's in .NET and fill dataset in only one call to selectcommand with odbc, but i got error of ';'.

Example:

SELECT * FROM OINV; SELECT * FROM INV1;

The error:

[SAP AG][LIBODBCHDB32 DLL][HDBODBC32] Syntax error or access violation;257 sql syntax error: incorrect syntax near ";"

Thanks.