PLS-00103：出現符號「申報」

Question

我試圖執行或運行以下的PL/SQL腳本：

SET serveroutput on; 

CREATE OR REPLACE PROCEDURE findAvg 
(p_category IN products.category_id% TYPE, c OUT NUMBER) 
AS 
BEGIN 
SELECT NVL ((SELECT AVG(LIST_PRICE) FROM products 
WHERE p_category = category_id), -1) into p_category 
from dual; 
END findAvg; 
DECLARE 
cat products.category_id%TYPE; 
Price products.List_price%TYPE; 
BEGIN 
cat := &p_category; 
findAvg (cat, price); 
if (price = -1) then 
    dbms_output.put_line('Wrong Category '); 
ELSE 
    dbms_output.put_line('the average price for category' || cat || ' is ' || price); 
END IF; 
END; 
/
show errors 

但是當我嘗試運行它，我得到這個錯誤信息（我可以只有在顯示錯誤後才能看到）：

 PLS-00103: Encountered the symbol "DECLARE" 

這個聲明有什麼問題？

Answer 1

你缺少一個「/」的創作過程和匿名塊的運行開始之間吧：

SET serveroutput on; 

CREATE OR REPLACE PROCEDURE findAvg 
(p_category IN products.category_id% TYPE, c OUT NUMBER) 
AS 
BEGIN 
    SELECT NVL(AVG(LIST_PRICE),-1) 
    INTO c 
    FROM products 
    WHERE p_category = category_id; 
END findAvg; 
/

show errors 

DECLARE 
cat products.category_id%TYPE; 
Price products.List_price%TYPE; 
BEGIN 
cat := &p_category; 
findAvg (cat, price); 
if (price = -1) then 
    dbms_output.put_line('Wrong Category '); 
ELSE 
    dbms_output.put_line('the average price for category' || cat || ' is ' || price); 
END IF; 
END; 
/

此外，「顯示錯誤」命令應該只是在創建後運行過程，如上所述，INTO子句應指定OUT參數。