VARCHAR2字段关联

SQL> create table a1(id int,name varchar2(10));

Table created.

SQL> create table a2(id int,name varchar2(10));

Table created.

SQL> insert into a1 values(1,'a');

1 row created.

Commit complete.

SQL> insert into a2 values(100,'a'||CHR(13));

1 row created.

SQL> COMMIT;

Commit complete.

SQL> SELECT * FROM A1;

	ID NAME
---------- ----------
	 1 a

SQL> SELECT * FROM A2;

	ID NAME
---------- ----------
       100 a

SQL> SELECT DUMP(NAME) FROM A1;

DUMP(NAME)
--------------------------------------------------------------------------------
Typ=1 Len=1: 97

Typ=1 Len=1: 97

SQL> select length(name) from a1;

LENGTH(NAME)
------------
	   1

--------------------------------------------------------------------------------
SQL> select dump(name) from a2;

DUMP(NAME)

Typ=1 Len=2: 97,13

SQL> select length(name) from a2;

LENGTH(NAME)
------------
	   2

SQL>
SQL>
SQL> select * from a1,a2
  2  where a1.name=a2.name;

no rows selected

SQL> select * from a1,a2
  2   where a1.name=replace(a2.name,CHR(13),'');

	ID NAME 	      ID NAME
---------- ---------- ---------- ----------
	 1 a		     100 a