如何根据使用oracle的当前时间显示“GOOD MORNING”或“GOOD AFTERNOON”或“GOOD NIGHT”

Question

如何根据当前时间显示“GOOD MORNING”或“GOOD AFTERNOON”或“GOOD NIGHT”

Answer 1

DECLARE  CURSOR CR从DUAL中选择SYSDATE;

BEGIN

FOR IN IN CR LOOP

IF TO_CHAR（I.SYSDATE，'HH24'）＆gt; = 0 AND TO_CHAR（SYSDATE，'HH24'）＆lt; 12 THEN

Dbms_output.put_line(' GOOD MORNING');

ELSIF TO_CHAR（I.SYSDATE，'HH24'）＆gt; = 12 AND TO_CHAR（SYSDATE，'HH24'）＆lt; 18 THEN

Dbms_output.put_line('GOOD EVENING ');

ELSE

Dbms_output.put_line('GOOD NI8 '); 

结束IF;

END LOOP;

END;