pushing complete python list to oracle db using cx_Oracle

问题

I have two list having 100 elements in each (say class_db_col, and class_id_col). I want to push all the items in class_db_col list to one column (say class_result) present in oracle DB.

statement = 'update TRANSFERS_TXN_MT set CLASS_RESULT = :1 where id= :2'
for i in range(len(class_db_col)):
     cursor.execute(statement,(class_id_col[i],class_db_col[i]))
conn.commit()

getting this error

ORA-01484: arrays can only be bound to PL/SQL statement

can anyone help me with this problem?

回答1:

If you have an array of tuples you can use cursor.executemany() instead. It looks like you have two parallel arrays which you can create tuples out of via this code:

data = list(zip(class_id_col, class_db_col))

This should result in an array that looks like this:

[(1, 4), (2, 6), ..., (8, 15)]

Then you can use this code:

cursor.executemany("update TRANSFERS_TXN_MT set CLASS_RESULT = :1 where id = :2", data)

来源：https://stackoverflow.com/questions/49315383/pushing-complete-python-list-to-oracle-db-using-cx-oracle

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python