如何用sql语句导出csv文件
如题

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set heading off
set termout off
spool c:\table_name.csv
select
col1|| ', '||col2|| ', '||col3 from table_name;
spool off
------解决方案--------------------
在pl/sql 的command window里執行不會有問題的。。。。
sql plus也行...
------解决方案--------------------
PL/SQL can do it, it might look like:

create or replace function dump_csv( p_query in varchar2,
p_separator in varchar2
default ', ',
p_dir in varchar2 ,
p_filename in varchar2 )
return number
AUTHID CURRENT_USER
is
l_output utl_file.file_type;
l_theCursor integer default dbms_sql.open_cursor;
l_columnValue varchar2(2000);
l_status integer;
l_colCnt number default 0;
l_separator varchar2(10) default ' ';
l_cnt number default 0;
begin
l_output := utl_file.fopen( p_dir, p_filename, 'w ' );

dbms_sql.parse( l_theCursor, p_query, dbms_sql.native );

for i in 1 .. 255 loop
begin
dbms_sql.define_column( l_theCursor, i,
l_columnValue, 2000 );
l_colCnt := i;
exception
when others then
if ( sqlcode = -1007 ) then exit;
else
raise;
end if;
end;
end loop;

dbms_sql.define_column( l_theCursor, 1, l_columnValue,
2000 );

l_status := dbms_sql.execute(l_theCursor);

loop
exit when ( dbms_sql.fetch_rows(l_theCursor) <= 0 );
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 := p_separator;
end loop;
utl_file.new_line( l_output );
l_cnt := l_cnt+1;
end loop;
dbms_sql.close_cursor(l_theCursor);

utl_file.fclose( l_output );
return l_cnt;
end dump_csv;
/


You would use that for example like this:

create or replace procedure test_dump_csv
as
l_rows number;
begin
l_rows := dump_csv( 'select *
from all_users
where rownum < 25 ',
', ', '/tmp ', 'test.dat ' );
end;
/


Make sure to read about the INIT.ORA parameters (utl_file_dir) you need to setup
!!!