CREATE OR REPLACE FUNCTION Jion_String_Comma_f(Input VARCHAR2)
RETURN VARCHAR2
PARALLEL_ENABLE
AGGREGATE USING Jion_String_Comma_f_Tp;
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this is a function my leader write,but i don't understand it ,my leader have travel
,who can explain it to me ,i don't understand Jion_String_Comma_f_Tp at the last ,i not found it at otherwhere.
thank you very much.

For knowing, what these clauses mean, you should consult Oracle documentation. CREATE FUNCTION statement is described in PL/SQL User's Guide and Reference, which is available with other Oracle documentation books e.g. online on http://tahiti.oracle.com/
For 11gR2, it is placed here: http://docs.oracle.com/cd/E11882_01/...e_function.htm

For knowing, how these clauses shall be used, you may use your favourite web search engine to find samples with their usage; it is shown e.g. in this one: http://asktom.oracle.com/pls/asktom/...:2196162600402

By the way, Jion_String_Comma_f_Tp should be user-defined TYPE (as specified in the links above).

3Q very much,i am a chinese students, my english is poor,3Q for solved my problem .