如何在 Python dataframe 中使用 oracle 序列 - ZA7F5F35426B9274113ZB923

Question

I have a sequence in oracle that I want to use to insert my data from a data frame in Python into an oracle database. I have already a sequence in oracle that I want to use.

I have a python data frame below that I want to consider a specific column as "ID" in order to put sequence:

ID	Name	NN
1	Sara	1234
2	Mina	6547

I have already a sequence in oracle which I call "SQ_test"

PS: I found how to create the sequence but I do not know how to use that or use that in my panda's data frame. here is the function that I can use:

def get_change_id():

   id = cursor.var(cx_Oracle.NUMBER)

   sql_query_sq = """
       BEGIN 
          :next_id := SQ_TEST.nextval; 
       END; 
   """

   cursor.execute(sql_query, {"next_id":id})

   change_id = id.getvalue()

   return change_id

Answer 1

I found a way to create a sequence by creating a table, after that whenever I want to insert my, automatically sequences are created and inserted in their column. How: When I create my table when I consider the type of my column, I also write down the sequence creation, Like this:

CREATE TABLE TABLE_NAME
(
 ID NUMBER(38,0) generated by default as identity primary key,
 ...
);

We need to be careful that till we insert the data into a table, the sequence will be continued, but if we want to restart the sequence, we need to drop the table.