QtSql 多查询执行

Question

 ...
 query.exec("insert into person values(104, 'Roberto', 'Robitaille')");
 query.exec("insert into person values(105, 'Maria', 'Papadopoulos')");
 ...

这些可以绑定(bind)在一个 中吗？查询.exec() ?

Answer 1

我猜你正试图批量执行你的查询。是的，qt 支持这种情况。

bool QSqlQuery::execBatch ( BatchExecutionMode mode = ValuesAsRows )

Executes a previously prepared SQL query in a batch. All the bound parameters have to be lists of variants. If the database doesn't support batch executions, the driver will simulate it using conventional exec() calls. Returns true if the query is executed successfully; otherwise returns false.

 QSqlQuery q;
 q.prepare("insert into myTable values (?, ?)");

 QVariantList ints;
 ints << 1 << 2 << 3 << 4;
 q.addBindValue(ints);

 QVariantList names;
 names << "Harald" << "Boris" << "Trond" << QVariant(QVariant::String);
 q.addBindValue(names);

 if (!q.execBatch())
     qDebug() << q.lastError();

http://doc.qt.io/archives/qt-4.7/qsqlquery.html#execBatch