oracle中如何从包含键值对结构的表中获取值

Question

I have a table with the below structure i want to get the name and address values based on id value.

i tried with below query but it didn't work.

select name,address from details where c_id=111
table name=**details**

c_id   key    value
111    name   abc
111    email  add@gmail.com
111    address  h.no 22,hyderabad
222    name    raj
222    email   xyz@yahoo.com
222    address h.no 24,india

Answer 1

You could use subqueries to get result sets for names and addresses, and then join them:

SELECT name, address
FROM   (SELECT c_id, value AS name
        FROM   details
        WHERE  key = 'name') n
JOIN   (SELECT c_id, value AS address
        FROM   details
        WHERE  key = 'address') a ON n.c_id = a.c_id