Suppose I have a table emp that has thousands of lines of data. In this table, I have to get only the employees whose salary is equal.

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  Apparently a very simple problem, but I can't seem to understand.

  Below is a table that contains the user's and LinkId name.

  CREATE TABLE UserLink (UserId NUMBER, LinkId NUMBER );
  ALTER TABLE UserLink ADD PRIMARY KEY (UserId, LinkId);
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  The correct query should output:

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  Here's one way:

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   where not exists (
                    select LINKID from ID_LIST UNPIVOT (LINKID for COL in(a,b))
                    minus
                    select B.LINKID
                      from USERLINK B
                     where B.USERID=a.USERID
                   )
  ;
  

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  Help to extract data Clob to a column in a table that has several lines in a table

  It works for only the first line

  CREATE or REPLACE DIRECTORY XMLDIR AS ' / orabackups';

  Grant read, write on DIRECTORY XMLDIR to the public;

  () dbms_xslprocessor.clob2file

  beef in CLOB,

  XMLDIR IN VARCHAR2,

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  DECLARE

  buf CLOB.

  BEGIN

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  IN buf

  OF H15TEST. H15_STAGE

  where rownum = 1;

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  END;

  /

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  CREATE or REPLACE DIRECTORY XMLDIR AS ' / orabackups';

  Grant read, write on DIRECTORY XMLDIR to the public;

  () dbms_xslprocessor.clob2file

  XData in CLOB,

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  DECLARE

  v_file utl_file.file_type;

  -write a unique to clob

  procedure write_clob (p_content in clob) is

  v_buffer varchar2 (32767).

  V_POSITION pls_integer: = 1;

  v_amount pls_integer: = 32767;

  Start

  loop

  Start

  DBMS_LOB. Read (p_content, v_amount, v_position, v_buffer);

  exception

  When no_data_found then exit;

  end;

  UTL_FILE.put_raw (v_file, utl_raw.cast_to_raw (v_buffer), true);

  V_POSITION: = v_position + v_amount;

  end loop;

  end;

  BEGIN

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  for r in)

  Select h15_doc

  of h15test.h15_stage

  )

  loop

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  end loop;

  UTL_FILE.fclose (v_file);

  END;

  /

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  The document which you are referring?

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