[英]convert BLOB to text in sql
I have a field in my database table with data type as BLOB
.How can I view the content as text/string
using a SELECT
query in SQL
. 我的数据库表中有一个字段,数据类型为
BLOB
如何使用SQL
的SELECT
查询将内容视为text/string
。 the content's MIMETYPE
is 'text/xml charset=UTF8'
内容的
MIMETYPE
是'text/xml charset=UTF8'
I tried with this, I'm not sure if im right with the syntax 我试过这个,我不确定我是否正确的语法
SELECT
CAST((SELECT column FROM myTable WHERE ID='56')AS CHAR(10000) CHARACTER SET utf8)
and also 并且
SELECT
CONVERT(VARCHAR(max), CAST((SELECT column FROM myTable WHERE ID='56')
as binary)) from BIZDOCCONTENT
many Thanks 非常感谢
Try: 尝试:
SELECT CONVERT(object USING utf8)
FROM tablename
试试这个查询 -
SELECT CONVERT(column USING utf8) FROM myTable WHERE ID=56
I had the same problem - I just changed the field type in phpmyadmin! 我遇到了同样的问题 - 我刚刚更改了phpmyadmin中的字段类型! And what i see :
而我所看到的:
ALTER TABLE pages
CHANGE content
content
TEXT NULL DEFAULT NULL ALTER TABLE
pages
CHANGE content
content
TEXT NULL DEFAULT NULL
('content' - my field which was in BLOB-type) ('内容' - 我的字段是BLOB类型)
CREATE OR REPLACE FUNCTION HASTANE.getXXXXX(p_rowid in rowid) RETURN VARCHAR2
AS
l_data long;
BEGIN
SELECT XXXXXX INTO l_data FROM XXXXX WHERE rowid = p_rowid;
RETURN substr(l_data, 1, 4000);
END getXXXXXX;
Set your content type in php: 在php中设置您的内容类型:
header("Content-type: image/jpg"); //Send the content Type here.
print $data['blob_data'];
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.