GRANT UPDATE ON demo TO demo_role; --赋予demo_role demo表的update权限
GRANT SELECT ON ALL TABLES IN SCHEMA PUBLIC to demo_role; --赋予demo_role所有表的SELECT权限
GRANT ALL ON demo TO demo_role; --赋给用户所有权限
GRANT SELECT ON demo TO PUBLIC; --将SELECT权限赋给所有用户
原文：https://www.cnblogs.com/qianxunman/p/14805135.html