sql) 我想输出字符串

Question

CREATE OR REPLACE PROCEDURE
pr(  v IN VARCHAR2 )  is
begin
     dbms_output.put(v);
end;
/

CREATE OR REPLACE 
PROCEDURE prt
(  n IN number )  
is
i number :=0;
begin
  LOOP
    i := i+1;
    exit when i=n ;
    pr(i);      
  END LOOP;
  pl(''); --dbms_output.new_line;
END;
/

set serveroutput on

exec prt(5);CREATE OR REPLACE PROCEDURE
pr(  v IN VARCHAR2 )  is
begin
     dbms_output.put(v);
end;
/

CREATE OR REPLACE 
PROCEDURE prt
(  n IN number )  
is
i number :=0;
begin
  LOOP
    i := i+1;
    exit when i=n ;
    pr(i);      
  END LOOP;
  pl(''); --dbms_output.new_line;
END;
/

set serveroutput on

exec prt(5);

该代码旨在仅输出输入的数字，但我想输出一个字符串而不是数字。所以我尝试用代码 pr(i||abc'); 创建它。但我遇到了一个错误。如果您能告诉我如何更正它以便我可以输出文本，我将不胜感激。

Answer 1

你有一个“错误”？哪个错误？我没有：

SQL> CREATE OR REPLACE PROCEDURE pr (v IN VARCHAR2)
  2  IS
  3  BEGIN
  4     DBMS_OUTPUT.put_line (v);
  5  END;
  6  /

Procedure created.

SQL> CREATE OR REPLACE PROCEDURE prt (n IN NUMBER)
  2  IS
  3     i  NUMBER := 0;
  4  BEGIN
  5     LOOP
  6        i := i + 1;
  7        EXIT WHEN i = n;
  8        pr (i);
  9     END LOOP;
 10  END;
 11  /

Procedure created.

SQL> EXEC prt(5);
1
2
3
4

PL/SQL procedure successfully completed.

SQL>

---

连接的'abc'：

SQL> CREATE OR REPLACE PROCEDURE prt (n IN NUMBER)
  2  IS
  3     i  NUMBER := 0;
  4  BEGIN
  5     LOOP
  6        i := i + 1;
  7        EXIT WHEN i = n;
  8        pr (i || 'abc');       --> concatenated abc
  9     END LOOP;
 10  END;
 11  /

Procedure created.

SQL> EXEC prt(5);
1abc
2abc
3abc
4abc

PL/SQL procedure successfully completed.

SQL>