oracle pl/sql 输入错误

Question

代码：

DECLARE
 N NUMBER :=&N;
BEGIN
 DBMS_OUTPUT.PUT_LINE(N);
END;

错误：

ORA-06550：第 2 行，第 12 列：PLS-00103：遇到符号“&” 预期以下情况之一时：

( - + case mod new not null continue avg count current 存在 max min prior sql stddev sum variance 执行 forall 合并 时间 时间戳 间隔 日期 管道

Answer 1

你需要做的：

SET DEFINE ON

我认为您正在使用 SQL Developer 之类的 GUI 客户端，并且您没有定义。 & 用于替换变量。

在 SQL 开发人员中：

SET serveroutput ON
SET define OFF
DECLARE
  N NUMBER :=&N;
BEGIN
  DBMS_OUTPUT.PUT_LINE(N);
END;
/

Error starting at line : 8 in command -
DECLARE
  N NUMBER :=&N;
BEGIN
  DBMS_OUTPUT.PUT_LINE(N);
END;
Error report -
ORA-06550: line 2, column 14:
PLS-00103: Encountered the symbol "&" when expecting one of the following:

   ( - + case mod new not null <an identifier>
   <a double-quoted delimited-identifier> <a bind variable>
   continue avg count current exists max min prior sql stddev
   sum variance execute forall merge time timestamp interval
   date <a string literal with character set specification>
   <a number> <a single-quoted SQL string> pipe
   <an alternatively-quoted string literal with character set specification>
   <an alternatively
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:

开启定义，然后重试：

SQL> SET serveroutput ON
SQL> SET DEFINE ON
SQL> DECLARE
  2    N NUMBER :=&N;
  3  BEGIN
  4    DBMS_OUTPUT.PUT_LINE(N);
  5  END;
  6  /
Enter value for n: 10
old   2:   N NUMBER :=&N;
new   2:   N NUMBER :=10;
10

PL/SQL procedure successfully completed.

SQL>