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mysql> select now();
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1.2 »ñµÃµ±Ç°ÈÕÆÚ+ʱ¼ä£¨date + time£©º¯Êý£ºsysdate()
sysdate() ÈÕÆÚʱ¼äº¯Êý¸ú now() ÀàËÆ£¬²»Í¬Ö®´¦ÔÚÓÚ£ºnow() ÔÚÖ´ÐпªÊ¼Ê±Öµ¾ÍµÃµ½ÁË£¬ sysdate() ÔÚº¯ÊýÖ´ÐÐʱ¶¯Ì¬µÃµ½Öµ¡£¿´ÏÂÃæµÄÀý×Ó¾ÍÃ÷°×ÁË£º
mysql> select now(), sleep(3), now();
+---------------------+----------+---------------------+
| now() | sleep(3) | now() |
+---------------------+----------+---------------------+
| 2008-08-08 22:28:21 | 0 | 2008-08-08 22:28:21 |
+---------------------+----------+---------------------+
mysql> select sysdate(), sleep(3), sysdate();
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| sysdate() | sleep(3) | sysdate() |
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| 2008-08-08 22:28:41 | 0 | 2008-08-08 22:28:44 |
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mysql> select curdate();
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current_date()
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3. »ñµÃµ±Ç°Ê±¼ä£¨time£©º¯Êý£ºcurtime()
mysql> select curtime();
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