Dynamic SQL tutorial

I was browsing our repository and i found this code in one of our reports within the data sets. I am assuming this is some sort of  dynamic SQL, could you please show a place where i can learn more. I mean tutorial on the syntax. Thanks in advance for the help.

= "SELECT  SF.GL_REFERENCE, 
                SP.BATCH_NUM,
                SF.ACCOUNT,
                SF.PUBLICATION,
                SF.AMOUNT AS GROSS,
                SF.ENTRY_DATE," & iif(Parameters!DSIServer.Label = "Los Angeles", "0", "SF.NET_AMT") & "  AS NET_AMT," & iif(Parameters!DSIServer.Label = "Los Angeles", "0", "SF.TAXABLE_AMT") & " AS TAXABLE_AMT,
                SF.TRANS_COST AS DELIVERY_FEE,
                SF.TIP,
                SF.CONTRIBUTION AS NIE 
FROM CIRC_RPT.VW_SUBS_FINANCIAL_DRW SF 
    LEFT OUTER JOIN CIRC.SUBS_PAYMENT SP ON  SF.TRANS_NUM = SP.TRANS_NUM 
WHERE SF.ENTRY_DATE BETWEEN TO_DATE('" & Parameters!BeginDate.Value & "', 'MM/dd/yyyy')" & " AND " & "TO_DATE('" & Parameters!EndDate.Value & "', 'MM/dd/yyyy') " & "
   AND PUBLICATION IN ( " & Join(Parameters!Publication.Value, ", ") & ")
   AND SF.GL_REFERENCE IN ('" & Join(Parameters!GLReference.Value, " ',' ") & "')"

]

svk