For PL/SQL 1)Create Directory Where BLOB resides. create or replace directory temp as '/oradata2'; -- if the directory name you created not qoted, then you can only use upper case to refer it. -- create or replace directory temp as 'xxxx', the temp d
BFILE 二进制文件,存储在数据库外的操作系统文件,只读的.把此文件当二进制处理. BLOB 二进制大对象.存储在数据库里的大对象,一般是图像声音等文件. CLOB 字符型大对象.一般存储大数量文本信息.存储单字节,固定宽度的数据. NCLOB 字节字符大对象.存储单字节大块,多字节固定宽度,多字节变宽度数据 BFILE The BFILE data type enables access to binary file LOBs that
DBMS_LOB包的使用 1. dbms_lob.append( dest_lob IN OUT NOCOPY BLOB, src_lob IN BLOB) dbms_lob.append( dest_lob IN OUT NOCOPY CLOB CHARACTER SET ANY_CS, src_lob IN CLOB CHRACTER SET dest_lob%CHARSET); 将源LOB变量的内容添加到目标LOB变量的尾部. 示例:dest_lob
在使用Oralce时,直接取出 CLOB 到 CHAR 转换或 BLOB 到 RAW 转换时,会出现ORA-22835的异常,以下是个人的解决方案 create or replace Function BlobToVarchar (Blob_In In Blob) Return clob Is V_Varchar ); V_Varchar1 ); V_Start Pls_Integer :; V_Buffer Pls_Integer :; Begin If Dbms_Lob.Getlength(
在Oracle中,存储在LOB中数据称为LOB的值,如使用Select 对某一LOB字段进行选择,则返回的不是LOB的值,而是该LOB字段的定位器(可以理解为指向LOB值的指针).如执行如下的SQL语句: DELCARE AUDIO_INFO BLOB: BENGIN SELECT audio INTO AUDIO_INFO FROM view_sites_info WHERE site_id=100;
博客:blog.shinelee.me | 博客园 | CSDN Blob作用 据Caffe官方描述: A Blob is a wrapper over the actual data being processed and passed along by Caffe, and also under the hood provides synchronization capability between the CPU and the GPU. Mathematically, a blob is