oracel中的表匯出csv檔案

1.定義儲存過程

create or replace procedure sql_to_csv

( p_query in varchar2, -- plsql文
p_dir in varchar2, -- 匯出的檔案放置目錄
p_filename in varchar2 -- csv名
) is
l_output utl_file.file_type;
l_thecursor integer default dbms_sql.open_cursor;
l_columnvalue varchar2(4000);
l_status integer;
l_colcnt number := 0;
l_separator varchar2(1);
l_desctbl dbms_sql.desc_tab;
p_max_linesize number := 32000;
begin
--open file
l_output := utl_file.fopen(p_dir, p_filename, 'w', p_max_linesize);
--define date format
execute immediate 'alter session set nls_date_format=''yyyy-mm-dd hh24:mi:ss''';
--open cursor
dbms_sql.parse(l_thecursor, p_query, dbms_sql.native);
dbms_sql.describe_columns(l_thecursor, l_colcnt, l_desctbl);
--dump table column name
for i in 1 .. l_colcnt loop
utl_file.put(l_output,l_separator || '"' || l_desctbl(i).col_name || '"'); --輸出表字段
dbms_sql.define_column(l_thecursor, i, l_columnvalue, 4000);
l_separator := ',';
end loop;
utl_file.new_line(l_output); --輸出表字段
--execute the query statement
l_status := dbms_sql.execute(l_thecursor);
--dump table column value
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 || '"' ||
trim(both ' ' from replace(l_columnvalue, '"', '""')) || '"');
l_separator := ',';
end loop;
utl_file.new_line(l_output);
end loop;
--close cursor
dbms_sql.close_cursor(l_thecursor);
--close file
utl_file.fclose(l_output);
exception
when others then
raise;
end;

create or replace directory out_path as '目標路徑';

例如sql>create or replace directory out_path as 'd:\';

通過查詢語句查出需要執行的儲存過程的語句

select 'exec sql_to_csv(''select * from ' ||t.table_name ||''',''out_path''' || ',''ods_mds.' || t.table_name ||'.csv'');' from user_tables t where t.table_name='表名'

select 'exec sql_to_csv(''select * from ' ||t.table_name ||''',''out_path''' || ',''' || t.table_name ||'.csv'');' from user_tables t where t.table_name='position_20170912';

exec sql_to_csv('select * from position_20170912','out_path','position_20170912.csv');

4.執行對應的過程語句

sql> exec sql_to_csv('select * from position_20170912','out_path','position_20170912.csv');

pl/sql procedure successfully completed

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