1、创建存储过程

CREATE OR REPLACE PROCEDURE SQL_TO_CSV

(

P_QUERY IN VARCHAR2, -- PLSQL文

P_DIR IN VARCHAR2, -- 导出的文件放置目录

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 || '"'); --输出表字段

DBMS_SQL.DEFINE_COLUMN(L_THECURSOR, I, L_COLUMNVALUE, 4000);

L_SEPARATOR := ',';

END LOOP;

UTL_FILE.NEW_LINE(L_OUTPUT); --输出表字段

--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;

/

2、创建 directory目录

create or replace directory OUT_PATH as '/expdp_dir';

3、拼接出导出的语句

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'

如果复杂的sql 语句可以创建出一张临时表，在把临时表导出来

例如： create table a as select * from bb ,cc where bb.id=cc.id;

直接导出临时表a即可；

4、执行导出csv的语句

EXEC sql_to_csv('select * from A','OUT_PATH','ODS_MDS.A.csv');

成功完成  end！！