S (Sno,sname,sdd,sage)Sno,sname,sdd,sageEach representative of the school number, learningMember's name, affiliation, student's ageC (Cno,cname)Cno,cnameRepresent the course number, the course name, respectivelySC (Sno,cno,score)Sno,cno,scoreRepresenting the school number,of the ElectiveCourse number, learning scoreThe data for the three tables are as follows:Problem:Use standard SQL nested statements to query the name and affiliation of the student taking a
// Obtain all field names BOOL GetFields (CACCADO ado) {CString SQL = _ T ("SELECT TOP 1 * FROM tableName"); ado. openRecordset (SQL); ADODB: _ RecordsetPtr rs = ado. getRecordsetPtr (); UINT64 colnum = rs-> GetFields ()-> Count; CString fieldname = _ T (""); for (long I = 0; I
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This article is from the "walker" blog, please be sure to keep this source http://walkerqt.blog.51cto.com/1310630/12814
nsarray*familynames=[[nsarrayalloc]initwitharray:[uifontfamilynames]]; nsarray*fontnames;nsintegerindfamily,indfont ;for (indfamily=0;indfamily Get all font names for iOS
Using unityengine;using system.collections;using system.collections.generic;using System.IO;Else{getobjectnametoarrayvoid Start () {//textasset[] texts = loadasset Unity3d returns all file names under this path according to the directory path under the specified assets
To display the table name of a specified database in mysql, the method is very simple. mysql provides a showtables command, which returns a data. Let's take a look at my details.
To display a table name of a specified database in mysql, the method is very simple. mysql provides a show tables command, which returns a piece of data. Let's take a look at my details.
To display a table name of a specified database in mysql, the method is simple. mysql provides a show tables command, which ret
Today in the image training to find the need to put a lot of pictures to process and then read into the classifier, originally written in C + +, the results found and will not, so I use back to my favorite C #, the result is great.The code below, simple and rude, more beautiful than the online C + + syntaxusingSystem;usingSystem.IO;namespaceconsoleapplication{classProgram {Static voidMain (string[] args) { Try { string[] Txtfiles = Directory.GetFiles ("F:\\ve
#include #include std::vectorchar* dirname){DIR *dp;structdirent* dirp;std::vectorif((dp = opendir(dirname)) == NULL){printf("this dir maybe not exist");}while((dirp = readdir(dp)) != NULL){filename_vector.push_back(dirp->d_name);}closedir(dp);returnfilename_vector;}Get all file names under a directory in Windows
1.for in loop and using the hasOwnProperty method1 varJsonObject1 = {2"Name": "Xiaoming",3"Age": 294 },5 varKEYS1 = [];6 for(varP1inchJsonObject1) {7 if(Jsonobject1.hasownproperty (p1))8 Keys1.push (p1);9 }Tenalert (KEYS1);If you do not use hasOwnProperty, adding your own attributes to object will also output1Object.prototype.test = "I am Test";2 varJsonobject = {3"Name": "Xiaoming",4"Age": 295 },6Keys = [];7 for(varPinchjsonobject)8 Keys.pus
/*dynamically change the column name of a table to lowercase*/SelectConcat_ws ("','ALTER TABLE', A.table_name,'Modify',Lower(A.column_name),' ', A.column_type, Case whenA.is_nullable= 'NO' Then 'Not null' Else NULL End, Case whenA.column_default is NULL Then NULL whenA.column_default= "' Then 'default" '" whenA.column_default is not NULL andA.data_typeinch('bigint','int','decimal') ThenConcat_ws ("','default', A.column_default) whenA.column_default is not N
Mysql returns the names of all tables in a database, and the column name data type remarks bitsCN. comdesc table name;
Show columns from table name;
Describe table name;
Show create table name;
Use information_schema
Select * from columns where table_name = 'Table name ';
By the way:
Show databases;
You can also
Use information_schema
Select table_schema, table_name from tables where table_schema = 'da
Note: Source Network
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> -- ========================================================== ============================== -- Lists All SQL Server tables, field names, primary keys, types, lengths, decimal places, and other information. -- Run in the query analyzer. -- ========================================
In windows, how does one use the doscommand to obtain the names of all files in a folder in batches? The following is a small Editor for you to operate.
1. Start --> Run --> Enter cmd and press enter to enter your path in the black box.
For example, f: \ 1 \ 2 \ 3 is input in the target path.
F: Press enter.
Cd \ 1 \ 2 \ 3 Press ENTER
2. Use tree or dir/w
Input: dir/w> c: \ temp.txt
3. Open my computer a
This article from: http://kyle.itpub.net/post/1626/8891
The original article is as follows:------------------ Obtain the names of all tables in the database, and the fields and types of fields corresponding to the table, which are stored in the # Magic temporary tableIf exists (select * From tempdb .. sysobjects where name like '# Magic % ')Drop table # MagicGoSelect a. Name, B. Name Col, C. Name typeInto #
Android: get the names of all applications installed on the mobile phone and the package name of the application.
This is tested on the android simulator. The total number of applications obtained is: 51. The application I installed on this simulator is used for testing.
The following code is just a method. during testing, this method is used to respond to a button. The Code is as follows:
Public void geta
Specific ideas:Using the Function.tostring () method, obtain the source code of the function, and then use the regular match to get the parameter name.Implementation code (code based on ES6)://gets the parameter name of the functionfunctionGetparametername (FN) {if(typeoffn!== ' object ' typeoffn!== ' function ')return; Const COMMENTS= /((\/\/.*$)| (\/\*[\s\s]*?\*\/)) /mg; Const Default_params= /=[^,)]+/mg; Const Fat_arrows=/=>.*$/mg; Let code= Fn.prototype?fn.prototype.constructor.toString ():
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