qt sql tutorial

The code is not analyzed here because it is enough in the tutorial. If you are interested, you can check the code yourself. This tutorial comes from the original neheopengl Chinese tutorial (http://www.yakergong.net/nehe/), but it has a bad place, that is, when I go to see, it can not download the code ~~~~ Maybe my character is poor. It can be used as a referenc

Tags: exist out port ipaddr _id compute exe ble tabThe stored procedures in Server SQL are as follows: CREATE procedure Pinsertpc@pcnum int,@pcname varchar (50),@pctype int,@ipaddress varchar (50),@port int,@pcid int OutputAs --declare @pcid intif exists (SELECT * from computertable where pcnum = @pcnum)Set @pcid =-1ElseBeginInsert into computertable (Pcnum, Pcname, Pctype, IpAddress, Port)VALUES (@pcnum, @pcname, @pctype, @ipaddress, @p

Tags: processing his model EMS query level queries + + propertiesThe Qsqltablemodel class inherits to the Qsqlquerymodel class, which provides an editable data model that reads and writes to a single SQL table, features: Modify, INSERT, delete, query, and sort Common functions Qvariant headerdata (int section, qt::orientation Orientation, int role = Qt::D isplayr

Label:Recently, a new project needs to use QT to connect to SQL Server on another machine, although there are similar articles on the Internet, but there are some issues that are rarely mentioned, so here's a summary: QT Connect SQL Server can refer to this article, if it is connected to another machine,

There are many ways to connect to a database, and here is one of the most common and useful ways to develop programs on windows that are easy to use and the way to connect to a database remotely . Prerequisite work: SQL Server 2008 is installed under Win7 and database mydb is created in SQL Server. QT connects to SQL

Qt tutorial 1-14 steps in total This tutorial describes how to use the QT toolkit for graphic user interface programming. It does not cover everything: It emphasizes teaching a programming idea of graphical user interface programming, and introducing QT features is also nec

----------------------------http://blog.csdn.net/reborntercel/article/details/6991147http://blog.csdn.net/fzu_dianzi/article/details/6959268--------------------------------Note that when the Query.exec ("SELECT * FROM student") has just been executed, query is pointing to the result set, and we can take advantage of query.next (), when the code is executed for the first time, Query points to the first record in the result set. Of course, we can also use the Seek (0) function or the first () func

There are many ways to connect to the database using QT. Here we describe the most common and practical method, because this method is very convenient for development programs on Windows, it is also required to remotely connect to the database. There are three methods to connect to the database: Refer to the following connection: connect to the ODBC database using QTNote that the database name used to connect to the database is different from SQLite.

); Query.prepare ("INSERT into Sny_file (SNY01,SNY02,SNY03,SNY04,SNY05,SNY06,SNY07,SNY08,SNY09,SNY10)" "VALUES (: S01,:S02,:S03,:S04,:S05,:S06,:S07,:S08,:S09,:S10)"); Query.bindvalue (": S01", lst.at (0));//work ListQuery.bindvalue (": S02", lst.at (2));//Manufacturing ProcessQuery.bindvalue (": S03", lst.at (3));//OnlineQuery.bindvalue (": S04", lst.at (4));//Import (I/O)Query.bindvalue (": S05", lst.at (5));//numberQuery.bindvalue (": S06", lst.at (6));//DateQuery.bindvalue (": S07", lst.at (7

#include #include#includeintMainintargcChar*argv[]) {Qcoreapplication A (argc, argv); QString servername="thinkpad-pc";//localhost QString dbname="adventureworks2008r2"; Qsqldatabase DB=qsqldatabase::adddatabase ("Qodbc"); Db.setconnectoptions (); QString DSN=qstring ("Driver={sql SERVER}; server=%1;database=%2; Trusted_connection=yes;"). ARG (servername). Arg (dbname); Db.setdatabasename (DSN); if(Db.open ()) {Qdebug ()"opened"; Db.close

1. OverviewQcustomplot is a super ultra-compact Qt drawing class, very beautiful, very easy to use, Only need to add a qcustomplot.h and qcustomplot.cpp files can be used, far more convenient and beautiful than QWT, you can use the two source files themselves can also be compiled into library files, very convenient.Official website: http://www.qcustomplot.com/1.0:http://download.csdn.net/detail/czyt1988/5986701Here's a look at its super-powerful featu

Label:#include #include#include#include#includeclassDatabasemanager: PublicQobject { Public: Databasemanager (Qobject*parent =0); ~Databasemanager (); Public: BOOLopendb (); BOOLDeleteperson (intID); Private: Qsqldatabase db; };Delete a person from the database:BOOL Databasemanager::d eleteperson (int ID) { boolfalse; if (Db.isopen ()) { qsqlquery query; = Query.exec (QString ("delete from person where id=%1"). Arg (ID)); } return ret; }The

Qt for Android development example tutorial This article describes how to use Qt5.3.0 to develop Android applications. Due to a small amount of official information, we will record the problems encountered during the development process and solutions. The procedure is as follows: 1. Only qml MediaPlayer can be used for video playback on the Android platform. 2. file: // For example: Image{ source:"

Tags: from solution oca Condition query class where SEL and. comReprint Please specify source: http://www.cnblogs.com/dachen408/p/7457312.htmlIn the process of programming, often involves the query, and there are many conditions, and conditions can be empty, if judged individually, there will be many cases, the solution:Qsqlquery query (m_db); QString province = qstring::fromlocal8bit ("Guangdong"); QString city = ""; QString null = ""; QString sql =

) VALUES (' Baidu ', ' https://www.baidu.com ', 4, ' CN ')The ID column is automatically updatedInsert INTO websites (name,url,country) VALUES (' StackOverflow ', ' http:/stackoverflow.com ', ' ind ')8. SQL UPDATEUPDATE table_name Set c1 = V1,C2 = V2 where c3 = V3;The WHERE clause specifies which record or records need to be updated. If you omit the WHERE clause, all the records will be updated!Update websites set Alexa =5000,country= ' USA ' where na

Red Gate Series iii SQL Server development tool SQL prompt 5.3.4.1 edition T-SQL smart sensing analyzer complete cracking + use tutorial Red Gate SeriesArticle: SQL compare 10.2.0.1337 edition, one of the red gate series, database comparison tool, complete cracking +

SQL Server is a relational database management system that was originally developed by the Microsoft,sybase and ashton-tate three companies and launched the first OS/2 version in 1988. After Windows NT was launched, Microsoft and Sybase went their separate ways in the development of SQL Server, and Microsoft ported SQL Server to Windows NT. MS

PHP's YII framework uses database configuration and SQL Operations Examples tutorial, yii example Tutorial Database access (DAO)YII contains a data access layer (DAO) built on top of the PHP PDO. DAO provides a unified set of APIs for different databases. Where ActiveRecord provides interaction between the database and the model (M,model in MVC), QueryBuilder is

, because others will read your SQL, whether in the program or in the script file, good typography not only makes people look pleasing, but also save time and effort when communicating with others. Don't ask team Member for a bunch of sql: Can you explain to me what a large section of SQL does? Although Microsoft to SQL