Oracle 程序（失败日期格式）

Question

我有这个程序：

SQL> create or replace procedure KORELACJA (START IN DATE, END IN DATE) AS
  2  BEGIN
  3  SELECT T.City, Corr(T.Value, H.Value)
  4  FROM TEMP T 
  5  INNER JOIN HUMIDITY H 
  6  on T.City = H.City 
  7  and T.mDate = H.mDate 
  8  WHERE T.mDate between to_date(START,'YYYY-MM-DD') and to_date(END,'YYYY-MM-DD') 
  9  GROUP BY T.City
 10  END;
 11  /

错误：ORA-06550：第 1 行，第 7 列：

有人知道如何解决这个问题吗？

[编辑]

SQL> show error procedure KORELACJA;
Errors for PROCEDURE KORELACJA:

LINE/COL ERROR
-------- -----------------------------------------------------------------
4/1      PLS-00428: an INTO clause is expected in this SELECT statement

Answer 1

看看这个例子；阅读代码中的注释。

我已经创建了示例表，只是为了确保程序代码可以编译。

SQL> create table temp (city varchar2(10), value number, mdate date);

Table created.

SQL> create table humidity (city varchar2(10), value number, mdate date);

Table created.

程序本身：

SQL> create or replace procedure korelacja
  2    (p_start in date, p_end in date)           --> renamed parameters
  3  is
  4    l_city temp.city%type;                     --> declared local variables for SELECT
  5    l_corr number;                             --  statement's results
  6  begin
  7    select t.city, corr(t.value, h.value)
  8      into l_city, l_corr                      --> missing INTO clause
  9      from temp t join humidity h on t.city = h.city
 10                                 and t.mdate = h.mdate
 11      where t.mdate between p_start and p_end  --> parameters already are DATEs; you don't
 12      group by t.city;                         --  need TO_DATE against them
 13  end;
 14  /

Procedure created.

SQL>

Oracle 程序（失败日期格式）

Oracle procedure (failure od date format)

oracle

plsql

date

procedure