Question

qt下怎样判断sqlite数据库内容是否为空

Answer 1

m_dbTest = QSqlDatabase::addDatabase("QSQLITE");
m_dbTest.setDatabaseName("sqlite.db");
if(m_dbTest.open())
{
qDebug() << "database succeeded to open";
}
else
{
qDebug() << "database failed to open";
}

QSqlQuery query(m_dbTest);
bool isTableExist = \
query.exec(QString("select count(*) from sqlite_master where type='table' and name='%1'").arg(strTableName))); //关键的判断
if(!isTableExist)
{