very troublesome. Because the database name is also written into the control file and the control file is stored in binary format, you cannot modify the control file content. Assume that you have modified the database name in the parameter file, that is, the value of DB_NAME. But at Oracle startup, because DB_NAME In the parameter file is inconsistent with the database name in the control file, causing database startup failure, a ORA-01103 error is returned.
Database Name
The database name must
1. Get allDatabase Name:(1) Select name from Master. DBO. sysdatabases order by name2. Get all table names:(1) Select name from sysobjects where xtype = 'U' order by nameXtype = 'U': indicates all user tables;Xtype = 's': indicates all system tables;
(2) Select name from sysobjects where type = 'U' and sysstat = '83'
Note: Generally, only type = 'U' is required, but sometimes the system tables are mixed in (I don't know why). After adding the followin
In java, the relationship between file names and class names has the following constraints:
The file name saved in Java must be consistent with the class name.
If there is only one class in the file, the file name must be consistent with the class name
A Java file can contain only one public object file containing more than one class,
The file name must be consistent with the public class name. If
Common array functions in php (5) (obtain the set of key names in the array) and array key namesArray_keys ($ arr, $ search_value, $ strict );
-- Obtains the set of key names in the array.
// The array to be retrieved in parameter 1; the default value of the key to be retrieved in parameter 2 is NULL; and the default value of parameter 3 is false if it is strictly compared (=. Parameter 3 is added in php5
function within the function to be investigated and input a parameter, arguments. callee.Copy codeThe Code is as follows:Function ee (){// ++Var fnname = getFnName (arguments. callee)// ++Alert (fnname)};Ee ();
Instance 3:
Copy codeThe Code is as follows:Function getFuncName (_ callee){Var _ text = _ callee. toString ();Var _ scriptArr = document. scripts;For (var I = 0; I {Var _ start = _ scriptArr [I]. text. indexOf (_ text );If (_ start! =-1){If (/^ function \ s * \ (. * \). * \ r \ n/. test
Php obtains the summary of root domain names, and php obtains the summary of domain names.
The examples in this article summarize how php obtains the root domain name and share it with you for your reference. The specific implementation method is as follows:
If you only get the domain name currently accessing your page, you only need to use the HTTP_HOST function in php. If you want to extract the url root
to avoid the use of reserved words", because the existence of illegal identities should not be facilitated:
First of all, there is a technology-independent aspect: At some point, "actually use the reserved word" will become gossip, right? I've seen a lot of this kind of situation. Since we all know not to use reserved words, why bother?
DBAs or other people who are accustomed to command line, write large amounts of SQL, and occasionally have to pay attention to the field escape, very a
inti,j; - for(i=0; i)Wuyi { the for(j=0;j4; j + +) - { Wu if(s[i].score[j] -) - { Aboutprintf"\n%s failed:", s[i].name); $printf"\nscores:"); - for(j=0;j4; j + +) -printf"%d\t", S[i].score[j]); - Break; A } + } the } -}struct type and Int,char, array and other basic types, is also a C language data type, but this is a custom data type, we can be based on the requirements of various ba
One, configuring DNS and search DomainsSpecially configured DNS The file is/etc/resolv.conf, and we can ifcfg-eth0 the NIC configuration and other configuration files specified in the.Demo Sample:[Email protected] desktop]# cat/etc/resolv.confSearch example.comNameServer 192.168.0.254[Email protected] desktop]#Second, configure host name[Email protected] desktop]# cat/etc/sysconfig/networkNetworking=yesHostname=instructor.example.comNisdomain=notexample[Email protected] desktop]#Third, configure
2.1 obtain the names of all tables in the database.
Sample Data:
Statement:
Select T. Name 'table name' from sysobjects t where objectproperty (T. ID,N 'isusertable') = 1
Or use select name from sysobjects where type = 'U'
Execution result:
2.2 obtain the names of all fields in all tables
Statement:
Select distinct C. Name 'field name'From sysobjectsT, syscolumns CWhere T. ID = C. IDAndObjectproperty (T. I
addition, someone may be looking for a shared Application List. Let's talk about it here.
Obtain the code of the shared application:
/**
Because of this method, the returned packageinfo object is not. But resolveinfo. Therefore, the methods for obtaining images, application names, and package names are different:
Packagemanager pmanager = messagesendactivity. this. getpackagemanager ();
Summary:
How to
The naming rules for files in Unix are not as strict as those in Windows. In other words, the characters that cannot be contained in file names in many Windows operating systems can be used in Unix operating systems. Therefore, some administrators who transfer data from the Windows operating system will feel particularly uncomfortable. Today, I will summarize the differences between the naming rules of the two operating systems to help the Windows Sys
The story about the conflict between function names and library function names.
Try the C ++ template and start a function with a relatively large size, called max.
Then I found a lot of errors.
# Include
Then Error
Think of it as a naming conflict, Orz ....
The second time
Get all parameters and parameter names in the request (parameter names are automatically obtained)-[Java]
There are two ways in the request.Request.getparametermap ();Request.getparameternames ();I want to get it in both ways.1. With Request.getparameternames ();Enumeration Enu=request.getparameternames ();while (Enu.hasmoreelements ()) {String Paraname= (String) enu.nextelement ();System.out.println (paran
1. Set in httpd. conf: ServerName110.110.110.000 # the IP address is the IPNameVirtualHost110.110.110.0002. configure the domain name and second-level domain name # implement second-level domain name authorization: tolowerRewriteMapvhosttxt: kncmsv
1. in httpd. set in conf: ServerName 110.110.110.000 # the IP address is the IP NameVirtualHost 110.110.110.000 you applied. configure domain name and second-level domain name # implement second-level domain name IfModule mod_rewrite.c RewriteMap lowe
Copyright statement: original works can be reproduced. During reprinting, be sure to mark them as hyperlinks.ArticleOriginal publication, author information, and this statement. Otherwise, legal liability will be held. Http://blog.csdn.net/mayongzhan-ma yongzhan, myz, mayongzhanThe writing is a little simple. 1. First Set * .csdn.net to point to your server IP address at the service provider. If not, buy your own CN. 1 RMB. 2. For details about how to set up a VM in Apache, refer to my digest --
In Linux, the database name, table name, column name, And alias are case-sensitive:
1. The database name and table name are case sensitive;
2. Table aliases are case sensitive;
3. The column name and column alias are case-insensitive in all cases;
4. Variable names are case sensitive;
MySQL is case insensitive in Windows.
Therefore, in order to make programs and databases run normally in different operating systems, the best way is to convert th
1. Query all database names in the database: The code is as follows:Copy code SELECT Name FROM Master... SysDatabases order by Name2. Query all the tables in a database: The code is as follows:Copy code SELECT Name FROM SysObjects Where XType = 'U' order by Name3. Query table structure information The code is as follows:Copy code SELECT (case when a. colorder = 1 then d. name else null end) table name,A. colorder Field No., a. na
When you use the dispatch platform today to invoke a method in the bean, you are prompted not to find the bean. It was found that if the name attribute value is not provided on the label, the default bean name starts with lowercase instead of uppercase.Here are the other documents to see:Use filters to customize the scan This is written in the Spring Development manual:3.12.4. Naming the components automatically detectedWhen a component is automatically detected during a scan, its bean name is g
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