为啥此代码给出错误

Posted 2023-03-28

【中文标题】为啥此代码给出错误

【英文标题】：Why this Code is Giving ERROR为什么此代码给出错误

【发布时间】：2014-12-10 12:21:08

【问题描述】：

我无法使用简单的 SELECT 语句来初始化变量。

DECLARE
A VARCHAR2(10);
BEGIN
A := (SELECT FIRST_NAME FROM FIMS_OWNER.EMPLOYEE_T WHERE WWID = 'NA734');
END;
/

错误：

[Error] Execution (4: 11): ORA-06550: line 4, column 11:
PLS-00103: Encountered the symbol "SELECT" 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 alternat
ORA-06550: line 4, column 76:
PLS-00103: Encountered the symbol ")" when expecting one of the following:

   * & - + ; / at for mod remainder rem <an exponent (**)> and
   or group having intersect minus order start union where
   connect || multiset

如果不可能，有什么替代方法。

PS：我正在使用这样的查询来设置变量（并稍后使用它），我的光标动态获取WWID，然后相应地更改值。

图片：http://i.stack.imgur.com/wzSDk.png

【参考方案1】：

因为在 Oracle 中，您不能将查询分配给变量。但是，您可以查询变量，如 ...

DECLARE
    A VARCHAR2(10);
BEGIN
    SELECT FIRST_NAME
    INTO A
    FROM FIMS_OWNER.EMPLOYEE_T
    WHERE WWID = 'NA734';
END;
/

【参考方案2】：

你的代码应该是

DECLARE
A VARCHAR2(10);
BEGIN
SELECT FIRST_NAME INTO A FROM FIMS_OWNER.EMPLOYEE_T WHERE WWID = 'NA734';
END;

您应该使用 INTO 子句将值选择到变量中