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学生上传了网站说是乱码。查了一下手册alter database new character set gbk2312; 大部分显示正确了。还有一小部分不正确。 CHARACTER SET子句用于更改默认的数据库字符集。COLLATE子句用于更改默认的数据库整序。 alter table 的选项比较多。以后在看 本文来自ChinaUnix博客,如果查看原文请点:http://blog.chinaunix.net/u1/57953/showart_1227270.html

by crastyl - MySQL文档中心 - 2008-09-27 15:11:08 阅读(889) 回复(0)

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alter table zhjaaa add (xktx varchar2(1)); 速度很慢啊,一直加不上啊

by zhj9705 - Oracle - 2004-11-16 10:20:38 阅读(700) 回复(3)

Mysql alter TABLE 句法 6.5.4 alter TABLE 句法 添加唯一 alter table justmusic add unique (musicsource) alter TABLE 允许你改变一个现有表的结构。例如,你可以添加或删除列,创建或撤销索引,更改现有列的类型或将列或表自身更名。你也可以改变表的注释和表的类型。查看章节 6.5.3 CREATE TABLE 句法。 如果你使用 alter TABLE 来改变一个列规约,但是 DESCRIBE ...

by militala - MySQL文档中心 - 2009-01-02 22:52:04 阅读(1290) 回复(0)

Table Manipulation Lets say you made your table, and all the data has been added to it. Now you have come across a problem... your limit for characters in that particular column is too small for what you now need. You don't want to have to delete all of this data, yet, you have to change your table some how. Fret no more everyone, you can manipulate your tables that have alr...

by bj2008_0201 - MySQL文档中心 - 2008-09-25 14:14:55 阅读(839) 回复(0)

语法 alter database alter {DATABASE | SCHEMA} [db_name] alter_specification [, alter_specification] ... alter_specification: [DEFAULT] CHARACTER SET charset_name [DEFAULT] COLLATE collation_name alter database更改数据库的全局属性,要得到必须要权限,root不限 ,其他用户用grant添加alter权限alter table语法alter [IGNORE] TABLE tbl_name alter_specification [, alter_specification] ... alter_s...

by crastyl - MySQL文档中心 - 2008-03-01 17:24:53 阅读(1630) 回复(0)

alter table EPM_F_APPLY add foreign key FK_EPM_F_AP_RELATIONS_D_DATE_M (MONTH_ID) references D_DATE_M (MONTH_ID) on delete restrict on update restrict 执行这句话,提示 Error: com.sybase.jdbc3.jdbc.SybSQLException: ASA Error -1000018: The object cannot be opened for DROP or alter. It is already open. -- (db_txnInfo.cxx 710) , SQL State: QDA18, Error Code: 21 这怎么解决?

by R0meal - Sybase - 2007-07-25 20:16:29 阅读(3049) 回复(1)

alter table drop 字段的时候,非常满,add字段却很快,请问有何方法提高drop字段的速度。

by feige1111 - Sybase - 2007-05-15 17:17:35 阅读(1901) 回复(3)

创建两个表, create table ye_x (id number(7), name varchar2(25),constraint ye_x_id_name_pk primary key); create table ye_y (id number(7), name varchar2(25), constraint ye_y_id_name_fk foreign key(id,name) references ye_x(id,name)); 然后 alter table ye_y disable constraint ye_y_id_name_fk cascade ; 然后 alter table ye_y enable constraint ye_y_id_name_fk ;//就会出错, //显示的错误为 cannot valida...

by yeshenghai - Oracle - 2006-07-05 10:46:56 阅读(809) 回复(2)

请教一个关于alter index问题!! 当我在做alter index index_name rebuild tablespace tablespace_name 的命令时,正好有一个用户在insert 那张表,是不是会引起死锁,或者数据库hang住的现象!!! 紧急啊!!!昨天生产库突然hang住了!!!不知道是不是这个原因!!

by zcwolf - Oracle - 2006-05-10 18:17:41 阅读(1469) 回复(5)

1>; alter database acct on datdev1=1000 2>; go Extending database by 512000 pages on disk datdev1 1>; sp_helpdb acct 2>; go name db_size owner dbid created status ------------------------ ------------- ------------------------ ------ -------------- -----...

by Rabbit... - Sybase - 2005-12-27 14:57:16 阅读(3660) 回复(6)

今天刚装了两个SYBASE SERVER,其中一个可以alter table drop column 但另一个SERVER上却只能add column,不能drop column或modify column, 请高手指点一二。

by DNA007 - Sybase - 2005-05-27 16:01:52 阅读(1454) 回复(9)