本文目录一览：

1、python如何保存从oracle数据库中读取的BLOB文件
2、python往mysql的blob字段写入二进制数据，怎么做
3、怎么用Python脚本怎么从oracle数据库中取出clob数据

python如何保存从oracle数据库中读取的BLOB文件

import cx_Oracle
con = cx_Oracle.connect('username', 'password', 'dsn')
blob_sql = "select column_name from table where clause"
cursor = con.cursor()
cursor.execute(blob_sql)
result = cursor.fetchall()
file = open('file_name', "wb")
file.write(result[0][0].read())  # 可以print查看result的内容，根据实际情况read
file.close()

python往mysql的blob字段写入二进制数据，怎么做

这有什么难的吗？ 你把你的二进制数据可以转成文本串插入，就跟普通的插入一样啊。

import MySQLdb, cPickle
# Connect to a DB, e.g., the test DB on your localhost, and get a cursor
connection = MySQLdb.connect(db="test")
cursor = connection.cursor()
# Make a new table for experimentation
cursor.execute("CREATE TABLE justatest (name TEXT, ablob BLOB)")
try:
    # Prepare some BLOBs to insert in the table
    names = 'aramis', 'athos', 'porthos'
    data = {}
    for name in names:
        datum = list(name)
        datum.sort()
        data[name] = cPickle.dumps(datum, 2)
    # Perform the insertions
    sql = "INSERT INTO justatest VALUES(%s, %s)"
    for name in names:
        cursor.execute(sql, (name, MySQLdb.escape_string(data[name])))
    # Recover the data so you can check back
    sql = "SELECT name, ablob FROM justatest ORDER BY name"
    cursor.execute(sql)
    for name, blob in cursor.fetchall():
        print name, cPickle.loads(blob), cPickle.loads(data[name])
finally:
    # Done. Remove the table and close the connection.
    cursor.execute("DROP TABLE justatest")
    connection.close()

怎么用Python脚本怎么从oracle数据库中取出clob数据

stmt = con.prepareStatement("select attach,fjmc,piid,swsj from receiveFile "); // attach是clolb对象
rs = stmt.executeQuery();
while (rs.next()) {
    java.sql.Blob blob = rs.getBlob(1); // 这一句可获得blob，clob等对象。
    // 然后再把blob转成文件
    File file = new File("G:\\XiangMu_dwoa\\数据库文件资料\\aaa");
    OutputStream fout = new FileOutputStream(file);
    // 下面将BLOB数据写入文件
    byte[] b = new byte[1024];
    int len = 0;
    while ((len = ins.read(b)) != -1) {
        fout.write(b, 0, len);
    }
}

你可以参考一下