The CData JDBC Driver for Sage 300 supports standard SQL joins like the following examples.

Inner Join

An inner join selects only rows from both tables that match the join condition:

SELECT * FROM OEInvoices INNER JOIN OEInvoices_InvoiceDetails ON OEInvoices.InvoiceUniquifier=OEInvoices_InvoiceDetails.InvoiceUniquifier

Left Join

A left join selects all rows in the FROM table and only matching rows in the JOIN table:

SELECT * FROM OEInvoices LEFT JOIN OEInvoices_InvoicePaymentSchedules ON OEInvoices.InvoiceUniquifier=OEInvoices_InvoicePaymentSchedules.InvoiceUniquifier