XMLType 测试记录

-- 创建表
CREATE TABLE employee_xml (emp_id NUMBER PRIMARY KEY,emp_data XMLType
);-- 插入数据
INSERT INTO employee_xml VALUES (1, XMLType(
'<?xml version="1.0" encoding="UTF-8"?>
<employee><personal_info><name>李四</name><age>30</age><email>lisi@company.com</email></personal_info><work_info><department>研发部</department><position>高级工程师</position><salary>80000</salary><hire_date>2020-01-15</hire_date></work_info><skills><skill>Java</skill><skill>Oracle</skill><skill>Python</skill></skills>
</employee>'));-- 查询员工信息
SQL> SELECT 2      e.emp_id,3      x.name,4      x.department,5      x.salary6  FROM employee_xml e,7      XMLTable('/employee'8          PASSING e.emp_data9          COLUMNS 10              name VARCHAR2(50) PATH 'personal_info/name',11              department VARCHAR2(50) PATH 'work_info/department',12              salary NUMBER PATH 'work_info/salary'13      ) x;EMP_ID NAME                                               DEPARTMENT                                             SALARY
---------- -------------------------------------------------- -------------------------------------------------- ----------1 李四                                             研发部                                               80000set linesize 300
col name for a10
col department for a30
col salary for a40
SELECT emp_id,EXTRACTVALUE(emp_data, '/employee/personal_info/name') as name,EXTRACTVALUE(emp_data, '/employee/work_info/department') as department,EXTRACTVALUE(emp_data, '/employee/work_info/salary') as salary
FROM employee_xml;SQL> set linesize 300
SQL> col name for a10
SQL> col department for a30
SQL> col salary for a40
SQL> SELECT 2      emp_id,3      EXTRACTVALUE(emp_data, '/employee/personal_info/name') as name,4      EXTRACTVALUE(emp_data, '/employee/work_info/department') as department,5      EXTRACTVALUE(emp_data, '/employee/work_info/salary') as salary6  FROM employee_xml;EMP_ID NAME       DEPARTMENT                     SALARY
---------- ---------- ------------------------------ ----------------------------------------1 ??????     ?????????                      80000-- 使用XMLTable查询技能列表
SELECT e.emp_id,s.skill_name
FROM employee_xml e,
XMLTable('/employee/skills/skill'PASSING e.emp_dataCOLUMNS skill_name VARCHAR2(50) PATH '.'
) s;SQL> SELECT 2      e.emp_id,3      s.skill_name4  FROM employee_xml e,5  XMLTable('/employee/skills/skill'6      PASSING e.emp_data7      COLUMNS skill_name VARCHAR2(50) PATH '.'8  ) s;EMP_ID SKILL_NAME
---------- --------------------------------------------------1 Java1 Oracle1 PythonSQL>