mysqlµÄ sequence µÄÎÊÌâ¡£ÔÚÏߵȴý¡£¡£
ÇëÎÊһϣ¬mysqlµÄsequenceÊÇ×Ô¶¯µÝÔöµÄ£¬²»ÐèÒª½øÐвÙ×÷¡£
ÄÇÎÒÔÚ²åÈëÒ»ÌõÖ÷¼Ç¼µÄʱºò£¬Í¬Ê±Òª¸øÕâ¸öÖ÷¼üµÄÆäËû±í½øÐвåÈëÊý¾Ý¡£Õâʱºò£¬ÎÒ¸ù±¾È¡²»µ½Õâ¸öµÝÔöµÄsequence°¢¡£¡£
Õâ¸öÎÊÌâÔõô½â¾ö°¢¡£¡£
ÄãÊÇÒª¸Õ²åÈëµÄÕâ¸ö×ÔÔöÖµÂð£¿
select last_insert_id();
»ò
select `auto_increment` from information_schema.tables where table_schema='¿âÃû' and table_name='±íÃû'
²åÈëºóÓÃLAST_INSERT_ID()È¡µÃ
ÓÃLAST_INSERT_ID()»á³öÎÊÌâÂ𣿣¿ Êý¾Ý¿âͬʱ²Ù×÷µÄ»°£¬Õâ¸öid»á²»»á±»±ðÈËÇÀµô°¡£¿£¿
²»»á
Ϊʲô°¡£¿£¿
ÓÐÈ˻شðÒ»ÏÂÂð£¿
ÖØµã: ¼ÙÈçÄãʹÓõ¥INSERTÓï¾ä²åÈë¶à¸öÐУ¬ LAST_INSERT_ID() Ö»·µ»Ø²åÈëµÄµÚÒ»ÐвúÉúµÄÖµ¡£ÆäÔÒòÊÇÕâʹÒÀ¿¿ÆäËü·þÎñÆ÷¸´ÖÆÍ¬ÑùµÄ INSERTÓï¾ä±äµÃ¼òµ¥¡£
ÀýÈ磺
mysql> INSERT INTO t VALUES
-> (NULL, 'Mary'), (NULL, 'Jane'), (NULL, 'Lisa');
Query OK, 3 rows affected (0.00 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> SELECT * from t;
+----+------+
| id | name |
+----+------+
| 1 | Bob |
| 2 | Mary |
| 3 | Jane |
| 4 | Lisa |
+----+------+
4 rows in set (0.01 sec)
mysql> SELECT LAST_INSERT_ID();
+------------------+
| LAST_INSERT_ID() |
+------------------+
| &n
Ïà¹ØÎÊ´ð£º
ÎÒ°²×°µÄÊÇappserv-win32-2.4.4a.exe×éºÏ°ü£¬ÎÒÔÚmysqlÖд´½¨ÁËÒ»¸ödb_bookÊý¾Ý¿â,²¢ÔÚdb_bookÊý¾Ý¿âÖд´½¨ÁËÒ»¸ötb_book±í£¬ÎÒÏëдһ¸öphp³ÌÐòÏòtb_book±íÖвåÈëÊý¾Ý£¬¿ÉÊdzöÏÖ¡°Ñ¡ÔñÊý¾Ý¿âʧ°Ü£¡¡±µÄÌáʾ£¬²»ÖªÊÇÊ ......
ÊÇÒ»Ìõ¸üвÙ×÷£º
Java code:
¡¡
private Integer bonus = 0;
public Integer getBonus() {
return bonus;
}
public void setBonus(Integer bonus) {
this.bonus = bonus;
}
String SQL = ......
ÎÒÔÚ³ÌÐòÀïÃæÐ´ÁËÒ»¸ö¼àÌýÆ÷£¬TomcatÆô¶¯µÄʱºò¾Í»áÈ¥¼ì²âÊý¾Ý¿âÊÇ·ñÁ¬½ÓÉÏÁË£¬µ«ÊDZ¨ÁË´í
Access denied for user 'root'@'localhost' (using password: YES)
·ÃÎʱ»¾Ü¾ø£¬ÔõÑùÐ޸ķÃÎÊÓû§µ ......
linuxÉϵÄmysql·þÎñÔÚ½Ú¼ÙÈÕͻȻµ±µô
ÏÖÔÚÕÒÔÒò£¬»³ÒÉÊÇ´ÅÅ̿ռ䲻¹»£¬ÏÖÔÚÐèÒªÕÒµ½È·ÔäµÄÖ¤¾Ý¡£
£±¡¡¾ßÌåÔÚÄĸöÎļþÏ¿ÉÒÔÕÒµ½£¬Ëûµ±µôµÄ¾ßÌåʱ¼äºÍÔÒò£¿
£²¡¡windowsÏÂcÅÌ¿ÉÒÔ±¨´ÅÅ̿ռ䲻¹»µÄÔÒò£¬²» ......
select time from table
time
2009-09-12 12
2009-09-12 13
2009-09-12 14
2009-09-12 15
Ôõô½« ²éѯµÄÊý¾Ý±äΪ
time
2009-09-12 12ʱ
2009-09-12 13ʱ
2009-09-12 14ʱ
......