set serveroutput on
declare
month int:=10;
begin
if month>=0 and month<=3 then
dbms_output.put_line('这是春季');
elsif month>=4 and month<=6 then
dbms_output.put_line('这是夏季');
elsif month>=7 and month<=9 then
dbms_output.put_line('这是秋季');
elsif month>=10 and month<=12 then
dbms_output.put_line('这是冬季');
else
dbms_output.put_line('月份非法');
end if;
end;
输出:
这是冬季