python pandas 读取execl指定类型插入Oracle 或mysql

1、pandas指定类型插入Oracle数据库

import pandas as pd
import sqlalchemy.types as type
from connet_ora import connet_oracle

# 链接Oracle
engine = connet_oracle()

df = pd.read_excel('./gzyh/生产规则编号.xls',dtype=str)
# data.to_csv("./data/df.csv")
print(df.head())
# 空值处理
# df[df=='nan'] = None
# df.fillna('',inplace=True)
print(df.shape)
data:pd.DataFrame = df.copy()

# 指定字段类型插入
col_type:dict = {'SUB_FETR_ID':type.VARCHAR(11),'EXSQL':type.VARCHAR(2000)}
data.to_sql('t1d_fetr_sql_20220629', con=engine,if_exists='replace',index=False,chunksize=1000,dtype=col_type)