請解決Oracle存儲過程錯誤

Question

我正在學習oracle，我是初學者。請解決我的以下錯誤。

create or replace 
PROCEDURE SP_SALE_SELECT 
(para1 OUT NVARCHAR2 
, para2 OUT NVARCHAR2 
, action IN NVARCHAR2 
) AS 
BEGIN 
    IF action = 1 then 
    Select * From VI_Sale; 
    Else if action = 2 then 
    Select * From VI_Sale 
    WHERE SaleID = para1; 
    Else if action = 3 then 
    Select * From VI_Sale 
    Where CustomerID = para1; 
    Else if action = 4 then 
    Select * From VI_Sale 
    where SaleID = para1 and CustomerID = para2; 
End if; 
END SP_SALE_SELECT; 

錯誤（20,5）：PLS-00103：出現符號 「SP_SALE_SELECT」 當 需要下列之一：如果

Answer 1

您使用ELSE IF代替ELSEFIF（無空間），所以你正在創建你應該關閉的其他ifs。

create or replace 
PROCEDURE SP_SALE_SELECT 
(para1 OUT NVARCHAR2 
, para2 OUT NVARCHAR2 
, action IN NVARCHAR2 
) AS 
BEGIN 
    IF action = 1 THEN 
    Select * From VI_Sale; 
    ElSEIF action = 2 THEN 
    Select * From VI_Sale 
    WHERE SaleID = para1; 
    ElSEIF action = 3 THEN 
    Select * From VI_Sale 
    Where CustomerID = para1; 
    ELSEIF action = 4 then 
    Select * From VI_Sale 
    where SaleID = para1 and CustomerID = para2; 
End if; 
END; 

Answer 2

將每個Else if更改爲ELSIF。另外，你不能從PL/SQL塊的表中選擇*，你需要選擇一個變量。例如，

create or replace 
PROCEDURE SP_SALE_SELECT 
(para1 OUT NVARCHAR2 
, para2 OUT NVARCHAR2 
, action IN NVARCHAR2 
) AS 
v_col1 VI_Sale.col1%type; 
BEGIN 
    IF action = 1 then 
    Select col1 into v_col1 From VI_Sale; 
    Elsif action = 2 then 
    Select col1 into v_col1 From VI_Sale 
    WHERE SaleID = para1; 
    Elsif action = 3 then 
    Select col1 into v_col1 From VI_Sale 
    Where CustomerID = para1; 
    Elsif action = 4 then 
    Select col1 into v_col1 From VI_Sale 
    where SaleID = para1 and CustomerID = para2; 
End if; 
END SP_SALE_SELECT;