I want to update table2.name (name reference from table1)

I have to two table
table1
id name
1 Tim
2 Ann
3 Demi
table2
cust id
01 1
02 2
table2.id reference from table1
I add column Name in table2
cust id name
01 1
02 2
I want to update table2.name (name reference from table1)
How to update.
:)

SQL> desc dept1
Name                                      Null?    Type
DEPTNO                                             NUMBER(2)
DNAME                                              VARCHAR2(14)
LOC                                                VARCHAR2(13)
SQL> desc emp1
Name                                      Null?    Type
EMPNO                                              NUMBER(4)
ENAME                                              VARCHAR2(10)
JOB                                                VARCHAR2(9)
MGR                                                NUMBER(4)
HIREDATE                                           DATE
SAL                                                NUMBER(7,2)
COMM                                               NUMBER(7,2)
DEPTNO                                             NUMBER(2)
SQL> alter table emp1 add dname varchar2(14);
Table altered.
SQL> update emp1 e set e.dname =
  2  (select d.dname from dept1 d
  3* where d.deptno = e.deptno)
SQL> /
14 rows updated.
SQL> select deptno,dname from dept1
SQL> /
    DEPTNO DNAME
        10 ACCOUNTING
        20 RESEARCH
        30 SALES
        40 MyDept
SQL> select deptno,dname from emp1
SQL> /
    DEPTNO DNAME
        20 RESEARCH
        30 SALES
        30 SALES
        20 RESEARCH
        30 SALES
        30 SALES
        10 ACCOUNTING
        20 RESEARCH
        10 ACCOUNTING
        30 SALES
        20 RESEARCH
        30 SALES
        20 RESEARCH
        10 ACCOUNTING
14 rows selected.
SQL>

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