Oracle PL/SQL/XML/XMLElement

Материал из SQL эксперт
Перейти к: навигация, поиск

Create xml element with xmlelement function

   <source lang="sql">

SQL> CREATE TABLE products(

 2    product_id              NUMBER(6),
 3    name            VARCHAR2(50),
 4    category        VARCHAR2(50),
 5    price      NUMBER(8,2),
 6    min_price       NUMBER(8,2)
 7  );

Table created. SQL> SQL> select xmlelement( "Product",xmlattributes(p.product_id,p.name as "Name"),xmlforest(p.category as "Category",p.price as "price"))

 2  from products p;

no rows selected SQL> SQL> drop table products; Table dropped. SQL> SQL>

 </source>
   
  


XMLElement: output result in XML

   <source lang="sql">

SQL> -- create demo table SQL> create table Employee(

 2    ID                 VARCHAR2(4 BYTE)         NOT NULL,
 3    First_Name         VARCHAR2(10 BYTE),
 4    Last_Name          VARCHAR2(10 BYTE),
 5    Start_Date         DATE,
 6    End_Date           DATE,
 7    Salary             Number(8,2),
 8    City               VARCHAR2(10 BYTE),
 9    Description        VARCHAR2(15 BYTE)
10  )
11  /

Table created. SQL> SQL> -- prepare data SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2               values ("01","Jason",    "Martin",  to_date("19960725","YYYYMMDD"), to_date("20060725","YYYYMMDD"), 1234.56, "Toronto",  "Programmer")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("02","Alison",   "Mathews", to_date("19760321","YYYYMMDD"), to_date("19860221","YYYYMMDD"), 6661.78, "Vancouver","Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("03","James",    "Smith",   to_date("19781212","YYYYMMDD"), to_date("19900315","YYYYMMDD"), 6544.78, "Vancouver","Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("04","Celia",    "Rice",    to_date("19821024","YYYYMMDD"), to_date("19990421","YYYYMMDD"), 2344.78, "Vancouver","Manager")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("05","Robert",   "Black",   to_date("19840115","YYYYMMDD"), to_date("19980808","YYYYMMDD"), 2334.78, "Vancouver","Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("06","Linda",    "Green",   to_date("19870730","YYYYMMDD"), to_date("19960104","YYYYMMDD"), 4322.78,"New York",  "Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("07","David",    "Larry",   to_date("19901231","YYYYMMDD"), to_date("19980212","YYYYMMDD"), 7897.78,"New York",  "Manager")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("08","James",    "Cat",     to_date("19960917","YYYYMMDD"), to_date("20020415","YYYYMMDD"), 1232.78,"Vancouver", "Tester")
 3  /

1 row created. SQL> SQL> SQL> SQL> -- display data in the table SQL> select * from Employee

 2  /

ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION


---------- ---------- --------- --------- ---------- ---------- ---------------

01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6544.78 Tester 04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Tester 06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 7897.78 Manager 08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester

8 rows selected. SQL> SQL> -- XMLElement: transforms data into XML format. SQL> -- The function takes two arguments ?the tag name and the data. Consider this example: SQL> SQL> SELECT xmlelement("Name",first_name), xmlelement("id",id), xmlelement("Date", start_date)

 2  FROM employee;

XMLELEMENT("NAME",FIRST_NAME)


XMLELEMENT("ID",ID)


XMLELEMENT("DATE",START_DATE)


<Name>Jason</Name> <id>01</id> <Date>1996-07-25</Date> <Name>Alison</Name> <id>02</id> <Date>1976-03-21</Date> <Name>James</Name> <id>03</id> <Date>1978-12-12</Date> <Name>Celia</Name> <id>04</id> <Date>1982-10-24</Date> <Name>Robert</Name> <id>05</id> <Date>1984-01-15</Date> <Name>Linda</Name> <id>06</id> <Date>1987-07-30</Date> <Name>David</Name> <id>07</id> <Date>1990-12-31</Date> <Name>James</Name> <id>08</id> <Date>1996-09-17</Date>

8 rows selected. SQL> SQL> SQL> SQL> -- clean the table SQL> drop table Employee

 2  /

Table dropped. SQL> SQL>


 </source>