Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

MySql ¸ñʽ»¯Ê±¼äº¯Êý

 ÕâÀïÊÇÒ»¸öʹÓÃÈÕÆÚº¯ÊýµÄÀý×Ó¡£ÏÂÃæµÄ²éѯѡÔñÁËËùÓмǼ£¬Æädate_colµÄÖµÊÇÔÚ×îºó30ÌìÒÔÄÚ£º
mysql> SELECT something from table
WHERE TO_DAYS(NOW()) - TO_DAYS(date_col) <= 30;
DAYOFWEEK(date)
·µ»ØÈÕÆÚdateµÄÐÇÆÚË÷Òý(1=ÐÇÆÚÌ죬2=ÐÇÆÚÒ», ……7=ÐÇÆÚÁù)¡£ÕâЩË÷ÒýÖµ¶ÔÓ¦ÓÚODBC±ê×¼¡£
mysql> select DAYOFWEEK('1998-02-03');
-> 3
WEEKDAY(date)
·µ»ØdateµÄÐÇÆÚË÷Òý(0=ÐÇÆÚÒ»£¬1=ÐÇÆÚ¶þ, ……6= ÐÇÆÚÌì)¡£
mysql> select WEEKDAY('1997-10-04 22:23:00');
-> 5
mysql> select WEEKDAY('1997-11-05');
-> 2
DAYOFMONTH(date)
·µ»ØdateµÄÔ·ÝÖÐÈÕÆÚ£¬ÔÚ1µ½31·¶Î§ÄÚ¡£
mysql> select DAYOFMONTH('1998-02-03');
-> 3
DAYOFYEAR(date)
·µ»ØdateÔÚÒ»ÄêÖеÄÈÕÊý, ÔÚ1µ½366·¶Î§ÄÚ¡£
mysql> select DAYOFYEAR('1998-02-03');
-> 34
MONTH(date)
·µ»ØdateµÄÔ·ݣ¬·¶Î§1µ½12¡£
mysql> select MONTH('1998-02-03');
-> 2
DAYNAME(date)
·µ»ØdateµÄÐÇÆÚÃû×Ö¡£
mysql> select DAYNAME("1998-02-05");
-> 'Thursday'
MONTHNAME(date)
·µ»ØdateµÄÔ·ÝÃû×Ö¡£
mysql> select MONTHNAME("1998-02-05");
-> 'February'
QUARTER(date)
·µ»ØdateÒ»ÄêÖеļ¾¶È£¬·¶Î§1µ½4¡£
mysql> select QUARTER('98-04-01');
-> 2
WEEK(date)
¡¡
WEEK(date,first)
¶ÔÓÚÐÇÆÚÌìÊÇÒ»ÖܵĵÚÒ»ÌìµÄµØ·½£¬ÓÐÒ»¸öµ¥¸ö²ÎÊý£¬·µ»ØdateµÄÖÜÊý£¬·¶Î§ÔÚ0µ½52¡£2¸ö²ÎÊýÐÎʽWEEK()ÔÊÐí
ÄãÖ¸¶¨ÐÇÆÚÊÇ·ñ¿ªÊ¼ÓÚÐÇÆÚÌì»òÐÇÆÚÒ»¡£Èç¹ûµÚ¶þ¸ö²ÎÊýÊÇ0£¬ÐÇÆÚ´ÓÐÇÆÚÌ쿪ʼ£¬Èç¹ûµÚ¶þ¸ö²ÎÊýÊÇ1£¬
´ÓÐÇÆÚÒ»¿ªÊ¼¡£
mysql> select WEEK('1998-02-20');
-> 7
mysql> select WEEK('1998-02-20',0);
-> 7
mysql> select WEEK('1998-02-20',1);
-> 8
YEAR(date)
·µ»ØdateµÄÄê·Ý£¬·¶Î§ÔÚ1000µ½9999¡£
mysql> select YEAR('98-02-03');
-> 1998
HOUR(time)
·µ»ØtimeµÄСʱ£¬·¶Î§ÊÇ0µ½23¡£
mysql> select HOUR('10:05:03');
-> 10
MINUTE(time)
·µ»ØtimeµÄ·ÖÖÓ£¬·¶Î§ÊÇ0µ½59¡£
mysql> select MINUTE('98-02-03 10:05:03');
-> 5
SECOND(time)
»ØÀ´timeµÄÃëÊý£¬·¶Î§ÊÇ0µ½59¡£
mysql> select SECOND('10:05:03');
-> 3
PERIOD_ADD(P,N)


Ïà¹ØÎĵµ£º

mysqliÓëmysqlÇø±ð

 mysqlÊǷdzּÌÁ¬½Óº¯Êý¶ømysqliÊÇÓÀÔ¶Á¬½Óº¯Êý¡£Ò²¾ÍÊÇ˵
mysqlÿ´ÎÁ´½Ó¶¼»á´ò¿ªÒ»¸öÁ¬½ÓµÄ½ø³Ì¶ømysqli¶à´ÎÔËÐÐmysqli½«Ê¹ÓÃͬһÁ¬½Ó½ø³Ì,´Ó¶ø¼õÉÙÁË·þÎñÆ÷µÄ¿ªÏú
ÓÐЩÅóÓÑÔÚ±à³ÌµÄʱºò£¬Ê¹ÓÃnew mysqli('localhost', usenamer', 'password', 'databasename');×ÜÊDZ¨´í£¬Fatal error: Class 'mysqli' not found in ......

MySQLÊý¾Ý¿âÖеÄShowÃüÁî¾ßÌåÓ÷¨

 MySQLÖÐÓкܶàµÄ»ù±¾ÃüÁshowÃüÁîÒ²ÊÇÆäÖÐÖ®Ò»£¬ÔںܶàʹÓÃÕßÖжÔshowÃüÁîµÄʹÓû¹ÈÝÒײúÉú»ìÏý£¬±¾ÎĻ㼯ÁËshowÃüÁîµÄÖÚ¶àÓ÷¨¡£
a. show tables»òshow tables from database_name; -- ÏÔʾµ±Ç°Êý¾Ý¿âÖÐËùÓбíµÄÃû³Æ¡£
b. show databases; -- ÏÔʾmysqlÖÐËùÓÐÊý¾Ý¿âµÄÃû³Æ¡£
c. show columns from table_nam ......

mysql±äÁ¿ÀàÐÍ

9.3. Óû§±äÁ¿
¿ÉÒÔÏÈÔÚÓû§±äÁ¿Öб£´æÖµÈ»ºóÔÚÒÔºóÒýÓÃËü£»ÕâÑù¿ÉÒÔ½«Öµ´ÓÒ»¸öÓï¾ä´«µÝµ½ÁíÒ»¸öÓï¾ä¡£Óû§±äÁ¿ÓëÁ¬½ÓÓйØ
¡£Ò²¾ÍÊÇ˵£¬Ò»¸ö¿Í»§¶Ë¶¨ÒåµÄ±äÁ¿²»Äܱ»ÆäËü¿Í»§¶Ë¿´µ½»òʹÓᣵ±¿Í»§¶ËÍ˳öʱ£¬¸Ã¿Í»§¶ËÁ¬½ÓµÄËùÓбäÁ¿½«×Ô¶¯ÊÍ·Å¡£
Óû§±äÁ¿µÄÐÎʽΪ@var_name
£¬ÆäÖбäÁ¿Ãûvar_name
¿ÉÒÔÓɵ±Ç°×Ö· ......

java£¨jsp)ʹÓÃMySqlÊý¾Ý¿â,ÖÐÎÄÂÒÂëµÄÍêÕû½â¾ö·½°¸

 java£¨jsp)ʹÓÃMySqlÊý¾Ý¿â,ÖÐÎÄÂÒÂëµÄÍêÕû½â¾ö·½°¸
mysqlÊÇÒ»¸öСÐ͵ĿªÔ´µÄÊý¾Ý¿â£¬ÓÃÀ´×ÔѧһЩ¼¼ÊõÊÇÊ®·Ö·½±ãµÄ¡£µ«Ê¹ÓÃmysql´æ´¢Êý¾Ý£¬Ò²»áÓöµ½Ò»Ð©·Ç³£¶ñÐĵÄÎÊÌ⣬È磺ÖÐÎÄÂÒÂëÎÊÌâ¡¢javaÇý¶¯³ÌÐòÎÞ·¨Ê¹ÓõÄÎÊÌ⣨ÒѾ­½â¾ö£¬Ïê¼û£ºhttp://hi.baidu.com/lauo1988/blog/item/ff0da655bd3e2eceb745ae0b.html)¡£ ......

Ô¶³ÌÁ¬½Ómysql

½â¾ö·½·¨(ת)£º---µ«Ö´ÐеÚÒ»Öְ취ʱ³öÏÖ´íÎ󣬵ڶþÖÖ°ì·¨³É¹¦
1¡£¸Ä±í·¨¡£¿ÉÄÜÊÇÄãµÄÕʺŲ»ÔÊÐí´ÓÔ¶³ÌµÇ½£¬Ö»ÄÜÔÚlocalhost¡£Õâ¸öʱºòÖ»ÒªÔÚlocalhostµÄÄÇ̨µçÄÔ£¬µÇÈëmysqlºó£¬¸ü¸Ä "mysql" Êý¾Ý¿âÀïµÄ "user" ±íÀïµÄ "host" Ï´Ó"localhost"¸Ä³Æ"%"
mysql -u root -pvmwaremysql>use mysql;mysql>update use ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ