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

¸ømysqlÌí¼ÓÒ»¸ö¹ÜÀíÔ±µÄSQLÓï¾ä

insert into mysql.user
SELECT '%', 'admin', PASSWORD('admin'), Select_priv, Insert_priv, Update_priv,
 Delete_priv, Create_priv, Drop_priv, Reload_priv,
 Shutdown_priv,  Process_priv, File_priv, Grant_priv, References_priv,
 Index_priv, Alter_priv, Show_db_priv, Super_priv, Create_tmp_table_priv,
 Lock_tables_priv, Execute_priv, Repl_slave_priv, Repl_client_priv,
 Create_view_priv, Show_view_priv, Create_routine_priv, Alter_routine_priv,
 Create_user_priv, ssl_type, ssl_cipher, x509_issuer, x509_subject,
 max_questions, max_updates, max_connections, MAX_USER_CONNECTIONS
 from mysql.user WHERE user='root';
×î½ü°²×°ÁËÒ»¸ö¶«Î÷, ×Ô´øMYSQL, ²»ÖªµÀROOTÃÜÂë, ²¢ÇÒÏÞÖÆÖ»ÄÜÔÚ±¾µØµÇ¼. ¼ÓÒ»¸öÓû§½øÈ¥ ¸ü·½±ã.


Ïà¹ØÎĵµ£º

Linux»·¾³ÏÂMySQLµÄ°²×°

1¡¢ÏÂÔØMySQLÃâ°²×°°æ/¶þ½øÖưæÈí¼þ£¨²»ÓñàÒ룩
Îļþ¸ñʽ£ºMYSQL-VERSION-OS.tar.gz
 
2¡¢´´½¨MySQL×飬½¨Á¢MySQLÓû§²¢¼ÓÈëµ½mysql×éÖÐ
£¨²»Í¬°æ±¾µÄUnixÖУ¬groupaddºÍuseraddµÄÓï·¨¿ÉÄÜ»áÉÔÓв»Í¬¡££©
#groupadd mysql
#useradd -g mysql mysql
 
3¡¢½øÈëĿ¼/usr/local£¬½âѹËõÃâ°²×°°æ£¬²¢ÔÚ ......

SQL²Ù×÷È«¼¯

ת×ÔCSDNÂÛ̳£ºchaihuoniu
ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾ ......

join ºÍ UnionºÍSQL Union All µÄÇø±ð


SQL UNION ²Ù×÷·û
UNION ²Ù×÷·ûÓÃÓںϲ¢Á½¸ö»ò¶à¸ö SELECT Óï¾äµÄ½á¹û¼¯¡£
Çë×¢Ò⣬UNION ÄÚ²¿µÄ SELECT Óï¾ä±ØÐëÓµÓÐÏàͬÊýÁ¿µÄÁС£ÁÐÒ²±ØÐëÓµÓÐÏàËÆµÄÊý¾ÝÀàÐÍ¡£Í¬Ê±£¬Ã¿Ìõ SELECT Óï¾äÖеÄÁеÄ˳Ðò±ØÐëÏàͬ¡£
SQL UNION Óï·¨
SELECT column_name(s) from table_name1
UNION
SELECT column_name(s) from table_na ......

SQLÓï¾äÖÐNULLµÄÕæÊµº¬Òå

NULL£¬±íʾ²»Ã÷È·¡¢Î´ÖªµÄÁÐÖµ
²âÊÔ±í£ºtestnull(id varchar(32))
Êý¾Ý¿â£ºSybase ASA11.0
ÐÐÊý¾Ý(''), (NULL)
Êý¾Ý¿âÑ¡ÏîansinullΪtrue(Ò²ÊÇASAÊý¾Ý¿âµÄĬÈÏÑ¡Ïî)ʱ£¬
select * from testnull where id = null
select * from testnull where id != null
½á¹û¾ùΪ¿Õ
select * from testnull where id is null
½á¹ ......

JAVAͨ¹ýODBCÁ´½ÓSQL SERVER

/**
 * @author ºýÍ¿¹í
 * ÔÚ½¨Á¢Á¬½Ó֮ǰÐèҪһЩ׼±¸¹¤×÷£º
 * ÔÚ¿ØÖÆÃæ°åÉÏͨ¹ý“¹ÜÀí¹¤¾ß”µÄ“Êý¾ÝÔ´(ODBC)”´ò¿ª“ODBCÊý¾ÝÔ´¹ÜÀíÆ÷”¶Ô»°¿ò£¬
 * µ¥»÷“ϵͳDSN”Ñ¡Ï£¬È»ºóµ¥»÷“Ìí¼Ó”°´Å¥£¬µÃµ½“´´½¨Êý¾ÝÔ´”¶Ô»°¿ò£¬
......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ