QT+SQLite3 基础

环境：DebianGNU/Linux8.1

QT版本：Qt Creator 3.2.1 Based on Qt 5.3.2(GCC 4.9.2, 32bit)

SQLite可视化软件：sqlitebrowser

.pro文件加上

QT += sql

头文件

#include<QtSql>

(1)建数据库、建表、插入数据、读取数据

QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("DB.db");
if(!db.open())
{
qDebug() << "database open failed!";
return ;
}

QSqlQuery query;

query.exec("create table student(id varchar, name varchar)");
query.exec(QObject::tr("insert into student values(1,'Rachel')"));
query.exec(QObject::tr("insert into student values(2,'Phoebe')"));
query.exec(QObject::tr("insert into student values(3,'Monica')"));
query.exec(QObject::tr("insert into student values(4,'Chandler')"));
query.exec(QObject::tr("insert into student values(5,'张三')"));
query.exec(QObject::tr("insert into student values(6,'李四')"));
query.exec(QObject::tr("insert into student values(7,'王五')"));
query.exec(QObject::tr("insert into student values(8,'赵四')"));
query.exec(QObject::tr("insert into student values(9,'赵五')"));
query.exec(QObject::tr("insert into student values(10,'赵六')"));

query.exec("select id,name from student where id>=1");
while(query.next())
{
int ele0=query.value(0).toInt();
QString ele1 = query.value(1).toString();
qDebug() << ele0 << " " << ele1;
}

（2）建数据库、建表（主键自增）、插入数据、读取数据

QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("DB.db");
if(!db.open())
{
qDebug() << "database open failed!";
return ;
}

QSqlQuery query;

query.exec("create table student(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL)");
query.exec(QObject::tr("insert into student values(NULL,'Rachel')"));
query.exec(QObject::tr("insert into student values(NULL,'Phoebe')"));
query.exec(QObject::tr("insert into student values(NULL,'Monica')"));
query.exec(QObject::tr("insert into student values(NULL,'Chandler')"));
query.exec(QObject::tr("insert into student values(NULL,'张三')"));
query.exec(QObject::tr("insert into student values(NULL,'李四')"));
query.exec(QObject::tr("insert into student values(NULL,'王五')"));
query.exec(QObject::tr("insert into student values(NULL,'赵四')"));
query.exec(QObject::tr("insert into student values(NULL,'赵五')"));
query.exec(QObject::tr("insert into student values(NULL,'赵六')"));

query.exec("select id,name from student where id>=1");
while(query.next())
{
int ele0=query.value(0).toInt();
QString ele1 = query.value(1).toString();
qDebug() << ele0 << " " << ele1;
}