How to restrict special characters for a specific column

Question

Dear gurus,
i have a table emp with a field field_1
in this particular field_1 is an address column where data can be like '12 st first floor' but suppose mistakenly user has entered the data as '12 st first floor & ' it should be restricted (not using trigger but can this be possible by using constraints )so for this how can we restrict the special characters not to get entered into the column.
regards,
friend

Answer 1

Another way of doing it.
drop table test_table;
create table test_table (col varchar2(50));
alter table test_table add constraint chk_address check (NOT regexp_like(col, '[[:punct:]]+'));
insert into test_table
(select  'some text' col from dual);
1 rows inserted.
insert into test_table
(select  'some text!' col from dual);
Error starting at line 20 in command:
insert into test_table
(select  'some text!' col from dual)
Error report:
SQL Error: ORA-02290: check constraint (FDL_DEV.CHK_ADDRESS) violated
02290. 00000 -  "check constraint (%s.%s) violated"
*Cause:    The values being inserted do not satisfy the named check
*Action:   do not insert values that violate the constraint.
insert into test_table
(select  'some text House#32' col from dual);
Error starting at line 23 in command:
insert into test_table
(select  'some text House#32' col from dual)
Error report:
SQL Error: ORA-02290: check constraint (FDL_DEV.CHK_ADDRESS) violated
02290. 00000 -  "check constraint (%s.%s) violated"
*Cause:    The values being inserted do not satisfy the named check
*Action:   do not insert values that violate the constraint.
insert into test_table
(select  'some text
(with new line)' col from dual);
Error starting at line 26 in command:
insert into test_table
(select  'some text
(with new line)' col from dual)
Error report:
SQL Error: ORA-02290: check constraint (FDL_DEV.CHK_ADDRESS) violated
02290. 00000 -  "check constraint (%s.%s) violated"
*Cause:    The values being inserted do not satisfy the named check