PLS-00103：遇到以下符号之一时出现符号：

Question

看起来没问题，但得到异常请纠正我。

declare 
    var_number number; 

begin 
    var_number := 10; 

    if var_number > 100 then 
     dbms_output.put_line(var_number||' is greater than 100'); 
    elseif var_number < 100 then 
     dbms_output.put_line(var_number||' is less than 100'); 
    else 
     dbms_output.put_line(var_number||' is equal to 100'); 
    end if; 

end; 

例外：

ORA-06550: line 8, column 8: 
PLS-00103: Encountered the symbol "VAR_NUMBER" when expecting one of the following: 
    := . (@ % ; 
ORA-06550: line 13, column 4: 
PLS-00103: Encountered the symbol ";" when expecting one of the following: 
    if 

Answer 1

为Oracle PL/SQL的关键词是 “ELSIF”（没有额外的 “E”），而不是ELSEIF（是的，混乱的和愚蠢的）

declare 
    var_number number; 
begin 
    var_number := 10; 
    if var_number > 100 then 
     dbms_output.put_line(var_number||' is greater than 100'); 
    elsif var_number < 100 then 
     dbms_output.put_line(var_number||' is less than 100'); 
    else 
     dbms_output.put_line(var_number||' is equal to 100'); 
    end if; 
end; 

Answer 2

begin 
    var_number := 10; 

    if var_number > 100 then 
     dbms_output.put_line(var_number||' is greater than 100'); 
    else if var_number < 100 then 
     dbms_output.put_line(var_number||' is less than 100'); 
    else 
     dbms_output.put_line(var_number||' is equal to 100'); 
    end if; 
end if; 

Answer 3

IF声明具有以下形式PL/SQL：

IF THEN 
IF THEN ELSE 
IF THEN ELSIF 

您已使用根据PL/SQL错误的elseif。这需要用ELSIF来代替。

所以你的代码应该像这样出现。

declare 
     var_number number; 
    begin 
     var_number := 10; 
     if var_number > 100 then 
      dbms_output.put_line(var_number ||' is greater than 100'); 
--elseif should be replaced with elsif 
     elsif var_number < 100 then 
      dbms_output.put_line(var_number ||' is less than 100'); 
     else 
      dbms_output.put_line(var_number ||' is equal to 100'); 
     end if; 
    end;