请解决Oracle存储过程错误

Question

我正在学习oracle，我是初学者。请解决我的以下错误。

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; 

错误（20,5）：PLS-00103：出现符号 “SP_SALE_SELECT” 当 需要下列之一：如果

Answer 1

您使用ELSE IF代替ELSEFIF（无空间），所以你正在创建你应该关闭的其他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

将每个Else if更改为ELSIF。另外，你不能从PL/SQL块的表中选择*，你需要选择一个变量。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;