我该如何解决这个 pl/sql 声明错误？

【问题标题】：how can i resolve this pl/sql declare error?我该如何解决这个 pl/sql 声明错误？
【发布时间】：2020-01-08 11:10:35
【问题描述】：

DECLARE
    COUNTING1 NUMBER(1);
BEGIN
    SELECT COUNT(VACATION_REMAINING_COUNT)
    INTO COUNTING1
    FROM VACATION
    WHERE NAME = :P0_VNAME;

    IF COUNTING1 > 0 THEN
        SELECT VACATION_REMAINING_COUNT
        FROM
        (
            SELECT ROW_NUMBER() OVER (ORDER BY CREATED DESC) ROW_ID,
                   V.VACATION_REMAINING_COUNT 
            FROM VACATION V
            WHERE NAME = :P0_VNAME
        )
        WHERE ROW_ID = 1;
    ELSE
        SELECT USER_YEAR_VACATION FROM VA_USER WHERE NAME = :P0_VNAME;
    END IF;
END;

ORA-06550：第 1 行，第 114 列：PLS-00103：在预期以下情况之一时遇到符号“DECLARE”：( - + case mod new not null continue avg count current exists max min prior sql stddev sum variance执行forall合并时间时间戳间隔日期管道

我写了这段 sql 代码。但是发生了错误。请帮帮我..

【问题讨论】：

您的 SELECT 需要一个 INTO 子句。

标签： oracle plsql

【解决方案1】：

您的第二个和第三个SELECT 语句缺少INTO 子句。

但是，我会跳过使用第一个 COUNT 语句，而只是尝试查找最新的行并在出现 NO_DATA_FOUND 异常时捕获它：

DECLARE
  p_vacation_remaining VACATION.VACATION_REMAINING_COUNT%TYPE;
BEGIN
  BEGIN
    SELECT vacation_count_remaining
    INTO   p_vacation_remaining
    FROM   vacation
    WHERE  name = :P0_VNAME
    ORDER BY created DESC
    FETCH FIRST 1 ROW ONLY;
  EXCEPTION
    WHEN NO_DATA_FOUND THEN
      SELECT USER_YEAR_VACATION
      INTO   p_vacation_remaining
      FROM   VA_USER
      WHERE NAME = :P0_VNAME;
  END;

  -- Do something with p_vacation_remaining
  DBMS_OUTPUT.PUT_LINE( p_vacation_remaining );
END;
/

【讨论】：