Find out how many times the string occurs

Hi all
I need to find how many times part of the chain occurs by using SQL and PLSQL.

Example:
How many 'e' in this statement 'Oracle Developer'

or

length (str) - length (replace (str, 'e'))

as in

SQL> with test as
  2  (select 'Oracle Developer' str from dual
  3  )
  4  select str
  5       , length (str) - length (replace (str, 'e'))
  6    from test
  7  ;

STR              LENGTH(STR)-LENGTH(REPLACE(STR,'E'))
---------------- ------------------------------------
Oracle Developer                                    4

Tags: Database

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