將table內容輸出為csv檔案

1、建立 directory

create or

replace

directory

tt as

'c:\'

;select *

from

dba_objects do

where

do.object_type

like

'%dir%'; --- 查詢目錄是否建立成功

2、輸出指令碼：來自asktom**

create or replace procedure dump_table_to_csv(p_tname    in

varchar2,
p_dir      
invarchar2,
p_filename 
in varchar2) authid current_user /*
<<<== if you want... runs as "invoker" and runs with roles 
*/is
l_output      utl_file.file_type;
l_thecursor   integer 
default
dbms_sql.open_cursor;
l_columnvalue varchar2(
4000
);  l_status      integer;
l_query       varchar2(
1000) default
'select * from ' ||p_tname;

l_colcnt      number := 0
;  l_separator   varchar2(1);
l_desctbl     dbms_sql.desc_tab;
begin
l_output := utl_file.fopen(p_dir, p_filename, 'w'
);  execute immediate 
'alter session set nls_date_format=
''dd-mon-yyyy hh24:mi:ss'''
;  dbms_sql.parse(l_thecursor, l_query, dbms_sql.native);
dbms_sql.describe_columns(l_thecursor, l_colcnt, l_desctbl);
for i in
1.. l_colcnt loop
utl_file.put(l_output,
l_separator || '
"' || l_desctbl(i).col_name || '"'
);    dbms_sql.define_column(l_thecursor, i, l_columnvalue, 
4000
);    l_separator := ','
;  end loop;
utl_file.new_line(l_output);
l_status :=dbms_sql.execute(l_thecursor);
while (dbms_sql.fetch_rows(l_thecursor) > 0
) loop
l_separator := ''
;    
for i in
1.. l_colcnt loop
dbms_sql.column_value(l_thecursor, i, l_columnvalue);
utl_file.put(l_output, l_separator ||l_columnvalue);
l_separator := ','
;    end loop;
utl_file.new_line(l_output);
end loop;
dbms_sql.close_cursor(l_thecursor);
utl_file.fclose(l_output);
execute immediate 
'alter session set nls_date_format=
''dd-mon-yy'''
;exception
when others then
execute immediate 
'alter session set nls_date_format=
''dd-mon-yy'''
;    raise;
end;

3、執行

sql> exec dump_table_to_csv(p_tname =>'test',p_dir =>'tt',p_filename => 'tt.csv' );

pl/sql procedure successfully completed

由於utl_file.fopen(p_dir, p_filename, 'w') 儲存過程要求p_dir必須為大寫字元，所以這裡要注意，如果不是全大寫，會出現

ora-29280: invalid directory path 錯誤

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