Selceting and updating records oracle

For this reason, it is Note: As mentioned in "Conventions", many examples in this book show results in pretty-printed form to promote readability, even when the results of the operation would not be pretty-printed in reality.The XPath language is a W3C Recommendation for navigating XML documents. It provides a rich set of operations that walk this tree and apply predicates and node-test functions.SELECT extract(OBJECT_VALUE, '/Purchase Order/Reference') "REFERENCE" FROM purchaseorder WHERE exists Node(OBJECT_VALUE, '/Purchase Order[Special Instructions="Expedite"]') = 1; REFERENCE ------------------------------------------------------------ attempts to determine the proper return type from the XML schema associated with the document, or from other information such as the SQL/XML view.

INSERT INTO xml_table VALUES (XMLType(bfilename('XMLDIR', 'purchase Order.xml'), nls_charset_id('AL32UTF8'))); 1 row created. SELECT OBJECT_VALUE FROM purchaseorder WHERE exists Node(OBJECT_VALUE, '/Purchase Order[Special Instructions="Expedite"]') = 1; OBJECT_VALUE ---------------------------------------------------------------------------------- cannot, because it returns a scalar value (number).SELECT extract Value(OBJECT_VALUE, '/Purchase Order/Reference') REFERENCE, extract Value(value(li), '/Line Item/@Item Number') LINENO, extract Value(value(li), '/Line Item/Description') DESCRIPTION FROM purchaseorder, table(XMLSequence(extract(OBJECT_VALUE, '//Line Item'))) li WHERE exists Node(OBJECT_VALUE, '/Purchase Order[Reference="DAUSTIN-20021009123335811PDT"]') = 1 AND ROWNUM There are several SQL functions that you can use to update XML data incrementally — that is, to replace, insert, or delete XML data without replacing the entire surrounding XML document.This is also called to insert or delete XML data by replacing a parent node in its entirety; this will work, but it is less efficient than using one of the other functions, which perform more localized updates.how can u print even rows by this syntax which u r given above it absolutely wrong.Pretty-printing of results has a performance cost in result size and processing time, because it requires building a full DOM and retaining or generating appropriate whitespace formatting information.Answer: Talking of “even or odd rows” is meaningless in Oracle until you have ordered the rows.Oracle does not store rows in a specific order – the order has to come from the query.SELECT reference, userid, shiptoname, specialinstructions FROM purchaseorder_table; REFERENCE USERID SHIPTONAME SPECIALINSTRUCTIONS -------------------------------- -------- ------------------------------------------------ ------------------- SBELL-2002100912333601PDT SBELL Sarah J. SELECT reference, lineno, upc, description, quantity FROM purchaseorder_lineitem; REFERENCE LINENO UPC DESCRIPTION QUANTITY ------------------------- ------ ------------ ---------------------------------- -------- SBELL-2002100912333601PDT 1 715515009058 A Night to Remember 2 SBELL-2002100912333601PDT 2 37429140222 The Unbearable Lightness Of Being 2 SBELL-2002100912333601PDT 3 715515011020 Sisters 4 3 rows selected.() = 1 GROUP BY extract Value(OBJECT_VALUE, '/Purchase Order/Reference') ORDER BY extract Value(OBJECT_VALUE, '/Purchase Order/Reference'); REFERENCE COUNT(*) -------------------------------- ---------- AWALSH-20021009123337303PDT 1 AWALSH-20021009123337954PDT 1 DAUSTIN-20021009123337553PDT 1 DAUSTIN-20021009123337613PDT 1 LSMITH-2002100912333722PDT 1 LSMITH-20021009123337323PDT 1 PTUCKER-20021009123336291PDT 1 SBELL-20021009123335771PDT 1 SKING-20021009123335560PDT 1 SMCCAIN-20021009123336151PDT 1 SMCCAIN-20021009123336842PDT 1 SMCCAIN-2002100912333894PDT 1 TFOX-2002100912333681PDT 1 TFOX-20021009123337784PDT 3 WSMITH-20021009123335650PDT 1 WSMITH-20021009123336412PDT 1 16 rows selected.SELECT extract Value(OBJECT_VALUE, '/Purchase Order/Reference') REFERENCE, extract Value(OBJECT_VALUE, '/Purchase Order/*//User') USERID, CASE WHEN exists Node(OBJECT_VALUE, '/Purchase Order/Reject/Date') = 1 THEN 'Rejected' ELSE 'Accepted' END "STATUS", extract Value(OBJECT_VALUE, '//Date') STATUS_DATE FROM purchaseorder WHERE exists Node(OBJECT_VALUE,'//Date') = 1 ORDER BY extract Value(OBJECT_VALUE,'//Date'); REFERENCE USERID STATUS STATUS_DATE -------------------------------- -------- -------- ------------ VJONES-20020916140000000PDT SVOLLMAN Accepted 2002-10-11 SMCCAIN-2002091213000000PDT SKING Rejected 2002-10-12 2 rows selected.DECLARE x Node XMLType; v Text VARCHAR2(256); v Reference VARCHAR2(32); CURSOR get Purchase Order(reference IN VARCHAR2) IS SELECT OBJECT_VALUE XML FROM purchaseorder WHERE exists Node(OBJECT_VALUE, '/Purchase Order[Reference="'

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