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1.向blob字段插入文本 INSERT INTO lobdemo ( key , clob_col, blob_col, bfile_col) VALUES (51, 'This is another character literal' , HEXTORAW( 'ABABABABABABABABABAB' ), NULL );
2.更新blob字段文本 UPDATE peoplesoft SET SUPPLIER_ID = HEXTORAW( 'CDCDCDCDCDCDCDCDCDCDCDCD' ) where rownum =2;
update PEOPLESOFT_1M set supplier_id = utl_raw.cast_to_raw(vendor_id) ;
3.向blob字段插入文件 CREATE TABLE yuser (ID number,photo BLOB);
create or replace directory images as '/test' ;
declare
l_bfile bfile;
l_blob blob;
begin
insert into yuser(ID,photo) values (1,empty_blob())
return photo into l_blob;
l_bfile:=bfilename( 'IMAGES' , 'test.doc' ); --IMAGES 是上面创建目录的大写
dbms_lob. open (l_bfile,dbms_lob.file_readonly);
dbms_lob.loadfromfile(l_blob,l_bfile,dbms_lob.getlength(l_bfile));
dbms_lob. close (l_bfile);
commit ;
end ;
/
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update的方式
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declare l_bfile bfile;
l_blob blob;
begin
update yuser set photo = empty_blob() where id = 2
return photo into l_blob;
l_bfile:=bfilename( 'IMAGES' , 'PS.pdf' );
dbms_lob. open (l_bfile,dbms_lob.file_readonly);
dbms_lob.loadfromfile(l_blob,l_bfile,dbms_lob.getlength(l_bfile));
dbms_lob. close (l_bfile);
commit ;
end ;
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00_yatou