SELECT TRUNC(SYSDATE, 'DD') FROM DUAL;--2017/6/7 --返回当年第一天 SELECT TRUNC(SYSDATE, 'YYYY') FROM DUAL;--2017/1/1 SELECT TRUNC(SYSDATE, 'YYY') FROM DUAL;--2017/1/1 SELECT TRUNC(SYSDATE, 'YY') FROM DUAL;--2017/1/1 SELECT TRUNC(SYSDATE, 'Y') FROM DUAL;--2017/1/1 --...
为数据库表的字段添加描述 comment on column sys_user.user_name is '用户名'; python中将DataFrame数据导入pgsql import psycopg2 from sqlalchemy import create_engine import sqlalchemy account = pd.read_csv('../input/account.csv') dtype_dict = { "together_type" : sqlalchemy.types...