Ten analysts need the same privileges on the same five tables. Fifty GRANTs is too many, and easy to get wrong when a person joins or leaves.

Group roles

Make one role for the job, give it the privileges, then make people members of it:

CREATE ROLE analysts;                          -- no LOGIN: a group
GRANT SELECT ON orders, order_items TO analysts;
GRANT analysts TO ana, ben;                    -- ana and ben are members

• GRANT role TO role makes the second role a member of the first. It has no ON: you grant a role, not a privilege on a table.
• A member inherits the privileges of the group. ana can read orders with no grant of her own.
• REVOKE analysts FROM ben; removes ben from the group and takes every group privilege away from him.

Check membership and privileges

has_table_privilege counts inherited privileges:

SELECT has_table_privilege('ana', 'orders', 'SELECT');   -- true

pg_has_role(member, group, 'MEMBER') is true when the first role is a member of the second.