授权用户myuser在模式myschema 单表的所有权限

 GRANT ALL ON TABLE "myschema"."mytable" to "myuser";

 授权用户myuser在模式myschema 单表的查询权限

 GRANT SELECT ON TABLE "myschema"."mytable" to "myuser";

授权用户myuser 在模式myschema 所有表的查询权限

GRANT SELECT ON ALL TABLES IN SEHEMA  myschema TO myuser ；

授权用户myuser在模式myschema 所有表的所有权限

方法1.GRANT SELECT, INSERT, UPDATE, DELETE, REFERENCES, TRIGGER, TRUNCATE ON ALL TABLES IN SEHEMA  myschema TO myuser ；

方法2.GRANT ALL ON ALL TABLES IN SCHEMA myschema TO myuser ;

收回数据库 ythgisdb  public权限

revoke connect on database ythgisdb from public; 

赋予用户数据库ythgisdb的连接权限

 grant connect on database ythgisdb to user01;