CERT_1以前是varchar(3000),現在的類型是blob類型，做數據庫遷移時，使用導入工具不能直接導入，所以使用SQL，下面是SQL

declare

directions????? BLOB;

amount????????? BINARY_INTEGER;

offset????????? INTEGER;

first_direction VARCHAR2(3000);

more_directions VARCHAR2(3000);

CURSOR c_TB1 Is

(

Select CERT_ID as ids, CERT_1 as blb From uaapra.tb_user_cert tb1 where CERT_1 is not null);

v_ids integer ;

begin

OPEN c_TB1;

LOOP

fetch c_TB1

into v_ids, first_direction;

update tb_user_cert set cert_1? = empty_blob() where cert_id? = v_ids; --更新和新增一樣要將BLOB字段設置為EMPTY_BLOB()

select cert_1? into directions from tb_user_cert where cert_id? = v_ids for update; --一定要用for update鎖住記錄，否則

--DBMS_LOB.OPEN會出錯

DBMS_LOB.OPEN(directions, DBMS_LOB.LOB_READWRITE);

amount := LENGTHB(first_direction); --number of characters to write

--有中文必須用LENGTHB

offset := 1; --begin writing to the first character of the CLOB

DBMS_LOB.WRITE(directions,

amount,

offset,

UTL_RAW.cast_to_raw(first_direction));

--UTL_RAW.cast_to_raw函數將字符串轉換成二進制數

DBMS_LOB.CLOSE(directions);

EXIT WHEN c_TB1%NOTFOUND;

END LOOP;

COMMIT;

CLOSE c_TB1;

end;

總結

以上是生活随笔為你收集整理的oracle将字符串转化为blob,oracle String类型转换成blob类型插入的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。