Trying to tune a SQL statement

Question

Please nee your help
The sql statement below works perfectly and speed fast
SELECT     0,
     :"gloSpaFolioID",
     SPA_ITEM_ID,
     :"Text Box 2",
     :"gloLogin",
     :"gloLogin"
FROM     SPA_ITEM
WHERE     UPC_CODE=:"Text Box 1"
AND     LOCATION=:"gloLocation"
But when append with the insert statement below, it slow down.
Does anyone have an idea on how I could tune this statement?
INSERT     INTO SPA_FOLIO_ITEM
     SPA_FOLIO_ITEM_ID,
     SPA_FOLIO_ID,
     SPA_ITEM_ID,
     QTY,
     CREATE_STAFF_ID,
     CHANGE_STAFF_ID
SELECT     0,
     :"gloSpaFolioID",
     SPA_ITEM_ID,
     :"Text Box 2",
     :"gloLogin",
     :"gloLogin"
FROM     SPA_ITEM
WHERE     UPC_CODE=:"Text Box 1"
AND     LOCATION=:"gloLocation"
Thanks,

Answer 1

The sql statement below works perfectly and speed fastIf the query starts returning rows quickly (like from sql plus) that doesn't mean the entire query is fast.
If I have a 300 million row table and do: select * from huge_table, I will start seeing rows in an instant, but the full table scan takes far longer.