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

MySql´´½¨º¯Êý

Ê×ÏÈÐèÒª²é¿´Ò»Ï´´½¨º¯ÊýµÄ¹¦ÄÜÊÇ·ñ¿ªÆô£º
X:\proper\mysql\bin>mysql -h localhost -u root -p
Enter password: **********
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12 to server version: 5.0.22-community-nt-log
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> show variables like '%func%';
+-----------------------------------------+-------+
| Variable_name                            | Value |
+-----------------------------------------+-------+
| log_bin_trust_function_creators | ON    |
+-----------------------------------------+-------+
1 row in set (0.02 sec)
Èç¹ûValue´¦ÖµÎªOFF£¬ÔòÐ轫Æä¿ªÆô¡£
mysql> set global log_bin_trust_function_creators=1;
´´½¨º¯Êýʱ£¬ÏÈÑ¡ÔñÊý¾Ý¿â£¬
mysql> use xxx;
Database changed
delimiter $$ÊÇÉèÖà $$ΪÃüÁîÖÕÖ¹·ûºÅ£¬´úÌæ·ÖºÅ£¬ÒòΪ·ÖºÅÔÚbegin...endÖлáÓõ½£»
mysql> delimiter $$
mysql> create function test(t varchar(255))
    -> returns varchar(255)
    -> begin
    -> return left(t,1);
    -> end
    -> $$
Query OK, 0 rows affected (0.13 sec)
º¯Êý´´½¨³É¹¦ºóÐè»Ö¸´·ÖºÅΪÃüÁîÖÕÖ¹·ûºÅ¡£
mysql> delimiter ;
²âÊÔ£º
mysql> select test('alpha');
+----------------+
| test('alpha') |
+---------------+
| a                 |
+---------------+
1 row in set (0.02 sec)
ɾ³ýº¯Êý£º
mysql> drop function test;
Query OK, 0 rows affected (0.11 sec)


Ïà¹ØÎĵµ£º

MySQL partition·ÖÇøI

Ò»¡¢        ·ÖÇøµÄ¸ÅÄî
¶þ¡¢        ÎªÊ²Ã´Ê¹Ó÷ÖÇø£¿£¨Óŵ㣩
Èý¡¢        ·ÖÇøÀàÐÍ
ËÄ¡¢        ×Ó·ÖÇø
Îå¡¢        ¶Ô·ÖÇø½øÐÐÐ޸ģ¨Ôö¼Ó¡¢É¾³ý¡¢·Ö½â¡¢ ......

oracleÏòmysqlÒÆÖ²

ÓÐһЩûÓÐʹÓÃÊý¾Ý¿âÖмä¼þµÄÈí¼þ¿ÉÄÜ»áÅöµ½ÔÚ²»Í¬µÄÓ¦Óó¡¾°ÐèÒªÓò»Í¬µÄÊý¾Ý¿â£¬ÕâÑù¿ÉÄܾÍÐèÒª½«Êý¾Ý¿â´úÂë×öÒÆÖ²£¬ÎÒÕâÀïÕûÀíÁËһЩ´Óoracleµ½mysqlµÄÒÆÖ²¹ý³ÌÖеÄ×¢ÒâÊÂÏ
1¡£sequenceÉú³É
¿ÉÒÔÓÃÀàËÆµÄ¶«Î÷À´×ö,ÈçÏ£º  
  create   table   myseq   ( &nb ......

mysql ³£Óú¯Êý

Ò»¡¢³£ÓÃ×Ö·û´®º¯Êý
1.CONCAT(str1,str2,...)
mysql> ? concat;
mysql> SELECT CONCAT('My', 'S', 'QL');
+-------------------------+
| CONCAT('My', 'S', 'QL') |
+-------------------------+
| MySQL        ......

MSSQL ʵÏÖ MySQL µÄ limit ²éѯ·½Ê½

MSSQL ÈçºÎʵÏÖ MySQL µÄ limit ²éѯ·½Ê½
²»ÖªÎªºÎ£¬MSSQL ÖÐûÓÐ limit Õâ¸ö¼«ÎªÖØÒªµÄ²éѯ·½Ê½£¬ÊìϤ MySQL µÄÅóÓѶ¼ÖªµÀ£¬MySQL µÄ limit ¶ÔÓÚʵÏÖ·ÖÒ³ºÍһЩÏÞÖÆ½á¹û¼¯µÄÓ¦ÓÃÖзdz£·½±ã¡£Ã»Óв»Òª½ô£¬ÎÒÃÇ¿ÉÒÔÓÃÆäËû·½·¨´ïµ½Í¬ÑùµÄÄ¿µÄ£¬×Ô¼º¶¯ÊÖ£¬·áÒÂ×ãʳ£¡
Óï·¨£º
Code:
SELECT * from
(
    ......

debianÏÂmysql¶ÔÖÐÎĵÄÖ§³ÖÎÊÌâ

ÐÞ¸Ä /etc/mysql/my.cnf Îļþ£¬
ÔÚ £Ûclient£Ý ϼÓÈë default-character-set=utf8,
ÔÚ   [mysqld] ϼÓÈë default-character-set=utf8,
ÔòÔÚviÀï¿ÉÒÔÕýÈ·µÄÏÔʾÖÐÎÄÁË£¨Ç°ÌáÊÇviҲʹÓÃutf8£©¡£
²»¹ýÔÚ²éѯµÄʱºò£¬½á¹ûÀïµÄÖÐÎÄÈ´»áÏÔʾ³É "?"£¬Õâ¸öÎÊÌâ±È½Ï¼òµ¥µÄ·½·¨Óм¸ÖÖ£¬·Ö±ðÊÇ£º
1.ÔÚ´´½¨Ê ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ