Oracle IF/ELSE语句

Question

我正在使用Oracle SQL Developer在Oracle12c中编写过程。我需要做的是检查一张表以查看是否存在记录。如果确实如此，那么我需要对其进行编辑。如果没有，那么我需要添加它。

所以，我的 “伪” 逻辑将是这个样子：

If (Select * from MyTable where MyValue = 0) has more than one record, then 
    This will be an EDIT line of code 
else 
    This will be an ADD line of code 
end 

我怎么会写在Oracle SQL Developer中？

编辑：

目前我的代码看起来是这样的，我需要添加一块要更新的记录。如果Line_ID存在，我需要更新记录。如果不是，我需要添加它。

create or replace PROCEDURE CST_WRITE_FEEDBACK (
v_AuditID IN NUMBER, 
v_BenefitID IN NUMBER, 
v_Network1 IN VarChar, 
v_Network2 IN VarChar, 
v_Network3 IN VarChar, 
v_Network4 IN VarChar, 
v_Issue1 IN NUMBER, 
v_Issue2 IN NUMBER, 
v_Issue3 IN NUMBER, 
v_Issue4 IN NUMBER, 
v_Resolution1 IN NUMBER, 
v_Resolution2 IN NUMBER, 
v_Resolution3 IN NUMBER, 
v_Resolution4 IN NUMBER, 
v_Status IN NUMBER, 
v_Comment IN VarChar, 
v_LineID IN NUMBER, 
v_EmpID IN NUMBER 
) 
AS 
BEGIN 

IF 

    INSERT INTO F_AUDIT_LINE ("AUDIT_ID", "BENEFIT_ID", "NETWORK", "NETWORK2", "NETWORK3", "NETWORK4", 
    "ISSUE_ID", "ISSUE_ID2", "ISSUE_ID3", "ISSUE_ID4", 
    "RESOLUTION_ID", "RESOLUTION_ID2", "RESOLUTION_ID3", "RESOLUTION_ID4", 
    "LINE_STATUS") 
    VALUES (v_AuditID, v_BenefitID, v_Network1, v_Network2, v_Network3, v_Network4, 
    v_Issue1, v_Issue2, v_Issue3, v_Issue4, 
    v_Resolution1, v_Resolution2, v_Resolution3, v_Resolution4, 
    v_Status 
); 

END CST_WRITE_FEEDBACK; 

Answer 1

declare 
    i number; 
begin 
    Select count(*) into i from MyTable where MyValue = 0; 
If (i > 0) then 
    update ... 
else 
    insert ... 
end; 
/

但是在留言中提到你可以拥有它：

merge into MyTable m 
using (select v_AuditID, v_BenefitID, v_Network1, v_Network2, _Network3, _Network4, 
       v_Issue1, v_Issue2, v_Issue3, v_Issue4, 
       v_Resolution1, v_Resolution2, v_Resolution3, v_Resolution4, v_Status 
     from dual) d 
on (d.MyValue = m.Myvalue) 
when matched then 
    update set .. 
when not matched then 
    insert ... 

如果您提供的程序代码，我们可以为您扩展命令。