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！！
