Newbie: PL/SQL, combining values of columns of different recordings?
HelloI want to extract a certain number of documents and then combine the value of one of their columns in a single record.
Leash so tell the following sql statement returns multiple records:
Select NAME, ADDRESS from userstable where ADDRESS = 'N6 0JG.
What I get in return is a file that looks like this
John Jack Jane Florian William Ann Helena, N6 0JG
Note that the name of each must come from another record and then get concatenated into one record for the output.
Thank you
J
Hello
Since you already have it in a cursor, we will just add another and make the two loops.
First let's make a cursor to address list
cursor c_address is
Select distinct ADDRESS
of userstable;
Now, let's make another slider that will loop through all the names to each address. I guess that your table contains multiple addresses. Note You can pass parameters to the cursor.
cursor c_names (p_addr in varchar2) is
Select NAME, ADDRESS
of userstable when the ADDRESS = p_addr;
Now we can put it all together. You can do everything you need with the result. I just stuck to a release on the subject.
DECLARE
CURSOR c_address
IS
SELECT DISTINCT address
Of userstable;
CURSOR c_names (p_addr IN VARCHAR2)
IS
SELECT NAME, address
Of userstable
WHEN address = p_addr;
v_namelist VARCHAR2 (2000); -Do this as large as you want
BEGIN
FOR x IN c_address
LOOP
FOR y IN c_names (x.address)
LOOP
-make a list of names with spaces
v_namelist: = v_namelist | ' ' || y.NAME;
END LOOP;
-Add address and a comma at the end of the list
v_namelist: = v_namelist | ', ' || x.Address;
Dbms_output.put_line ('v_namelist =' | v_namelist);
END LOOP;
END;
Tags: Database
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