bridge names

"> property="id" column="order_id"/> property="orderNo" column="order_no"/> property="price" column="order_price"/> id="getOrder2" parameterType="int" resultMap="getOrder2Map"> SELECT * FROM orders WHERE order_id=#{id} Resultmap: Encapsulating Some mapping relationships ID: specifically for primary key Result: For general fields Test @Test public void test2(){ SqlSessionFactory factory = MybatisUtils.getFactory(); SqlSession sess

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

the current database name dbname. Then query the table name (add the second top N number from 0 to traverse the current database table name) ID =-735 union select, (select top 1 name from sysobjects where xtype = u and name not in (select top 0 name from sysobjects where xtype = u, 6, 7, 8 from sysobjects If you want to query the table names of other databases, you can also do this: ID =-735 union select 1, 2, (select top 1 name from [dbname] .. syso

table does not exist.Description Alter Table Change the definition of an existing table. Add Column Format and Create Add a new column to the table with the same syntax as the table. / Field. Alter Column Form allows you / Set or delete the default value in the field ). Note that the default value is only valid for newly inserted rows. The rename clause can change a table or column without affecting any data in the relevant table. / Field name. Therefore, tables or columns

Mysql adds columns, modifies column names, column attributes, deletes columns, and mysql column names.Mysql modifies the table name, column name, column type, adds a table column, and deletes a table column.Alter table test rename test1; -- modify the table nameAlter table test add column name varchar (10); -- add a table columnAlter table test drop column name; -- delete a table columnAlter table test modify address char (10) -- modify the table colu

This article mainly introduces the use of PHP to convert uppercase names to underline division naming, this article explains some not accustomed to capitalization style naming methods such as Pascal name, hump naming method to convert the method, the need for friends can refer to the next Sometimes it is necessary to convert the uppercase of a string into _+ lowercase, and when the variable is named, it will run into this problem, directly on the co

default value of NULL and the following values are desirable. Value Description Column to rename. Database user-defined databases. This option is required to rename the database. Index user-defined indexes. OBJECT is the type of item that is tracked in sysobjects. For example, object can be used to rename constraints (CHECK, FOREIGN key, Primary/unique key), user tables, views, stored procedures, triggers, and rules. Userdatatype the user-defined data type that is added by executing the sp_addt

Objectiveor do you write an automated packaging script today that takes you to get the last file name from the path name. Here is a record of the implementation process. Of course, in the end I will also give the official practice. (PS: Very awkward, only to realize that the bash shell has ready-made functions) Get file nameSuppose the given path name is: /tmp/csdn/zhengyi/test/zhengyi.txt awk Solutionuse "/" to make the separator, and then print out the last part. The implemen

Get all column names in a temporary table select name from tempdb.dbo.syscolumns where id=object_id( '#TempTB') To determine whether a specified column name exists in a temporary table If Col_length (' tempdb.dbo. #TempTB ', ' columnName ') is not null print ' exists ' else print ' does not exist ' The above is the entire content of this article, I hope the content of this article for everyone's study or work can bring some help, but al

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