[Oracle 学习] Oracle中将查询语句执行结果导入文本文件
1 创建directory
create or replace directory DIR
as 'd:\temp';
为用户赋予该directory的权限
create or replace directory DIR
as 'd:\temp';
为用户赋予该directory的权限
grant all on directroy dir to public;
2 创建函数function
create or replace function tofile(p_query in varchar2,
p_separator in varchar2,
p_dir in varchar2,
p_filename in varchar2)
return number
is
l_cursor integer default dbms_sql.open_cursor;
l_output utl_file.file_type;
l_columnValue varchar2(2000);
l_status integer;
l_colCnt number default 0;
l_separator varchar2(10) default '';
l_cnt number default 0;
rec_tab dbms_sql.desc_tab;
col_num number;
begin
l_output := utl_file.fopen( p_dir,p_filename,'w' );
dbms_sql.parse( l_cursor ,p_query, dbms_sql.native );
p_separator in varchar2,
p_dir in varchar2,
p_filename in varchar2)
return number
is
l_cursor integer default dbms_sql.open_cursor;
l_output utl_file.file_type;
l_columnValue varchar2(2000);
l_status integer;
l_colCnt number default 0;
l_separator varchar2(10) default '';
l_cnt number default 0;
rec_tab dbms_sql.desc_tab;
col_num number;
begin
l_output := utl_file.fopen( p_dir,p_filename,'w' );
dbms_sql.parse( l_cursor ,p_query, dbms_sql.native );
/*写入该SQL查询结果的列名,以空格隔开*/
dbms_sql.describe_columns(l_cursor,l_colCnt,rec_tab);
col_num := rec_tab.first;
if( col_num is not null) then
loop
utl_file.put( l_output , l_separator||rec_tab(col_num).col_name);
col_num := rec_tab.next(col_num);
l_separator :=' ';
EXIT WHEN (col_num IS NULL);
end loop;
end if;
utl_file.new_line( l_output );
dbms_sql.describe_columns(l_cursor,l_colCnt,rec_tab);
col_num := rec_tab.first;
if( col_num is not null) then
loop
utl_file.put( l_output , l_separator||rec_tab(col_num).col_name);
col_num := rec_tab.next(col_num);
l_separator :=' ';
EXIT WHEN (col_num IS NULL);
end loop;
end if;
utl_file.new_line( l_output );
/*写入SQL查询结果的列值*/
for i in 1.. l_colCnt loop
dbms_sql.define_column( l_cursor , i,
l_columnValue,2000);
end loop;
l_status :=dbms_sql.execute(l_cursor);
loop
exit when ( dbms_sql.fetch_rows( l_cursor ) <= 0 );
l_separator :='';
for i in 1 .. l_colCnt loop
dbms_sql.column_value( l_cursor ,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;
for i in 1.. l_colCnt loop
dbms_sql.define_column( l_cursor , i,
l_columnValue,2000);
end loop;
l_status :=dbms_sql.execute(l_cursor);
loop
exit when ( dbms_sql.fetch_rows( l_cursor ) <= 0 );
l_separator :='';
for i in 1 .. l_colCnt loop
dbms_sql.column_value( l_cursor ,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_cursor );
utl_file.fclose( l_output );
return l_cnt;
end tofile;
utl_file.fclose( l_output );
return l_cnt;
end tofile;
3 创建执行该function的存储过程procedure
create or replace procedure test_tofile
as
l_rows number;
l_filename varchar2(100);
v_sql varchar2(100);
l_temp varchar2(100);
begin
v_sql := 'select to_char(sysdate,''yyyymmdd'') from dual';
as
l_rows number;
l_filename varchar2(100);
v_sql varchar2(100);
l_temp varchar2(100);
begin
v_sql := 'select to_char(sysdate,''yyyymmdd'') from dual';
EXECUTE IMMEDIATE v_sql
INTO l_temp;
INTO l_temp;
l_filename := 'dbperform_'|| l_temp || '.txt';
l_rows := tofile( 'SELECT fs.tablespace_name TABLESPACE_NAME,
df.totalspace TABLESPACE_TOTAL_SIZE,
(df.totalspace - fs.freespace) MB_USED,
fs.freespace MB_FREE,
round(100 * (fs.freespace / df.totalspace),2) PCT_FREE
FROM
(SELECT tablespace_name, ROUND(SUM(bytes) / 1048576) TotalSpace FROM dba_data_files GROUP BY tablespace_name ) df,
(SELECT tablespace_name, ROUND(SUM(bytes) / 1048576) FreeSpace FROM dba_free_space GROUP BY tablespace_name ) fs
WHERE df.tablespace_name = fs.tablespace_name(+)
order by PCT_FREE ASC',
',', 'DIR', l_filename );
l_rows := tofile( 'SELECT fs.tablespace_name TABLESPACE_NAME,
df.totalspace TABLESPACE_TOTAL_SIZE,
(df.totalspace - fs.freespace) MB_USED,
fs.freespace MB_FREE,
round(100 * (fs.freespace / df.totalspace),2) PCT_FREE
FROM
(SELECT tablespace_name, ROUND(SUM(bytes) / 1048576) TotalSpace FROM dba_data_files GROUP BY tablespace_name ) df,
(SELECT tablespace_name, ROUND(SUM(bytes) / 1048576) FreeSpace FROM dba_free_space GROUP BY tablespace_name ) fs
WHERE df.tablespace_name = fs.tablespace_name(+)
order by PCT_FREE ASC',
',', 'DIR', l_filename );
dbms_output.put_line(l_rows);
end;
end;
/*这里的'DIR'指明了directory dir,不过,由于是在WINDOWS环境,需要大写该directory名*/
4 调用该存储过程
4 调用该存储过程
SQL>exec test_tofile();