Updating xml clob in oracle

The INSERT INTO purchaseorder VALUES (XMLType(bfilename('XMLDIR', 'SMCCAIN-2002091213000000PDT.xml'), nls_charset_id('AL32UTF8'))); INSERT INTO purchaseorder VALUES (XMLType(bfilename('XMLDIR', 'VJONES-20020916140000000PDT.xml'), nls_charset_id('AL32UTF8'))); SELECT XMLCast(XMLQuery('$p/Purchase Order/Reference' PASSING po.

Example 5-22 extracts the fragments of a document that are identified by an XPath expression.

An XQuery sequence can contain items of any XQuery type, which includes numbers, strings, Boolean values, dates, and various types of XML node ( to decompose the result of an XQuery query to produce virtual relational data. Oracle provides two XQuery engines for evaluating XQuery expressions: one in Oracle XML DB, for use with XML data in the database, and one in Oracle XML Developer's Kit, for use with XML data outside the database.

The XQuery expression used in this example is identical to the one used in Example 5-6; the result of evaluating the XQuery expression is a sequence of table, so the overall SQL-query result set has only ten rows. Similarly, Oracle provides two mid-tier XQJ implementations for accessing these two XQuery engines.

The example uses XQuery Full Text to perform full-text search.

These purchase orders are grouped by customer and counted.

Type it in and press "Enter." Type an "ALTER TABLE" command to add a CLOB item to an existing table, using the following SQL code as a guide: ALTER TABLE your_table ( add big_text_field CLOB ); Press "Enter" to execute the command.

CREATE TABLE purchaseorder_table (reference VARCHAR2(28) PRIMARY KEY, requestor VARCHAR2(48), actions XMLType, userid VARCHAR2(32), costcenter VARCHAR2(3), shiptoname VARCHAR2(48), address VARCHAR2(512), phone VARCHAR2(32), rejectedby VARCHAR2(32), daterejected DATE, comments VARCHAR2(2048), specialinstructions VARCHAR2(2048)); CREATE TABLE purchaseorder_lineitem (reference, FOREIGN KEY ("REFERENCE") REFERENCES "PURCHASEORDER_TABLE" ("REFERENCE") ON DELETE CASCADE, lineno NUMBER(10), PRIMARY KEY ("REFERENCE", "LINENO"), upc VARCHAR2(14), description VARCHAR2(128), quantity NUMBER(10), unitprice NUMBER(12,2)); INSERT INTO purchaseorder_table (reference, requestor, actions, userid, costcenter, shiptoname, address, phone, rejectedby, daterejected, comments, specialinstructions) SELECT t.reference, t.requestor, t.actions, t.userid, t.costcenter, t.shiptoname, t.address, t.phone, t.rejectedby, t.daterejected, t.comments, t.specialinstructions FROM purchaseorder p, XMLTable('/Purchase Order' PASSING p.You typically use XQuery with Oracle XML DB in the following ways. Bell Air Mail 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 ('$p/Purchase Order/Requestor' PASSING po. OBJECT_VALUE AS "p" RETURNING CONTENT) AS VARCHAR2(30)) reference, count(*) FROM purchaseorder po, XMLTable('$p//Line Item[Part/@Id="37429148327"]' PASSING OBJECT_VALUE AS "p") WHERE () = 1 GROUP BY XMLCast(XMLQuery('$p/Purchase Order/Reference' PASSING po.The examples here are organized to reflect these different uses. OBJECT_VALUE AS "p" RETURNING CONTENT) AS VARCHAR2(128)); NAME COUNT(*) -------------------- ---------- Allan D. OBJECT_VALUE AS "p" RETURNING CONTENT) AS VARCHAR2(30)) ORDER BY XMLCast(XMLQuery('$p/Purchase Order/Reference' PASSING po.Oracle's namesake database management system has a data type called a CLOB, or Character Large OBject.Though the standard character data type, called CHAR, has a size limit of 2,000 characters, you can store over 2 billion characters in a CLOB.

Leave a Reply