如何用qt

Question

將數據插入到sqlite的如何使用qt將數據插入sqlite：

query = QSqlQuery("INSERT INTO customer_details (rationcard_num, aadharcard_num, name) 
    values('"+rationcard_num+"','"+aadharcard_num+"','"+name+"')"); 

Answer 1

你也許可以致電查詢exec()或直接與exec(const QString& query)調用它。因此，例如，你可以這樣做：

QSqlQuery query; 
query.exec("INSERT INTO customer_details (rationcard_num, aadharcard_num, name)" 
      + "values('" + rationcard_num + "','" + aadharcard_num + "','" 
      + name + "')"); 

然而，如果你想使用一個事先準備好的聲明你想構建一個QSqlDatabase查詢，調用該prepare(statement)並綁定值。例如：

QSqlQuery query; 
query.prepare("INSERT INTO person (rationcard_num, aadharcard_num, name) " 
       "VALUES (:rationcard_num, :aadharcard_num, :name)"); 
query.bindValue(":rationcard_num", rationcard_num); 
query.bindValue(":aadharcard_num", aadharcard_num); 
query.bindValue(":name", name); 
query.exec(); 

Answer 2

您可以修改您的代碼並查詢這個樣子的，我認爲這將澄清你的疑慮：

準備查詢語句

QSqlQuery query; 
query.prepare("INSERT INTO customer_details(rationcard_num, aadharcard_num, name) values(:rationcard_num,:aadharcard_num,name)"); 

綁定值

query.bindValue(":rationcard_num",your_value); 
query.bindValue(":aadharcard_num",your_value); 
query.bindValue(":name",your_value); 

調試

您可以使用qDebug()找到，如果您的查詢是可執行文件：

qDebug()<<query.exec()<<endl; 

如果插入，否則爲假

Answer 3

QSqlQuery query; 
query.exec("INSERT INTO customer_details (rationcard_num,aadharcard_num,name)VALUES('"+rationcard_num+"','"+aadharcard_num+"','"+name+")");