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  • 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
    


     

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  • 原文地址:https://www.cnblogs.com/zhaoyangjian724/p/3797974.html
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