Execute a %LIKE% query in Qt
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I want to execute a parameterized in qt using value binding.
This is the code:
QString name = "Foo";
query->prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE %:surname%");
query->bindValue(":surname", name);
The problem is with the % character: it generates an error while executing the query, however i don't known how to use it with qt.
c++ qt qt5 qsqlquery
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
add a comment |
I want to execute a parameterized in qt using value binding.
This is the code:
QString name = "Foo";
query->prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE %:surname%");
query->bindValue(":surname", name);
The problem is with the % character: it generates an error while executing the query, however i don't known how to use it with qt.
c++ qt qt5 qsqlquery
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
add a comment |
I want to execute a parameterized in qt using value binding.
This is the code:
QString name = "Foo";
query->prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE %:surname%");
query->bindValue(":surname", name);
The problem is with the % character: it generates an error while executing the query, however i don't known how to use it with qt.
c++ qt qt5 qsqlquery
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
I want to execute a parameterized in qt using value binding.
This is the code:
QString name = "Foo";
query->prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE %:surname%");
query->bindValue(":surname", name);
The problem is with the % character: it generates an error while executing the query, however i don't known how to use it with qt.
c++ qt qt5 qsqlquery
c++ qt qt5 qsqlquery
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
edited Nov 16 '18 at 19:38
eyllanesc
87.8k103564
87.8k103564
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
asked Nov 16 '18 at 16:37
bzoarkbzoark
497
497
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You do not have to use "%" in the prepare but concatenate the QString, on the other hand it is not necessary so far I have not needed to use a QSqlQuery pointer so I recommend not using it since it has a copy constructor.
QSqlQuery query;
QString name = "Foo";
query.prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE :surname");
query.bindValue(":surname", QString("%%1%").arg(name));
query.exec();
while(query.next())
qDebug()<< query.value(0) << query.value(1);
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You do not have to use "%" in the prepare but concatenate the QString, on the other hand it is not necessary so far I have not needed to use a QSqlQuery pointer so I recommend not using it since it has a copy constructor.
QSqlQuery query;
QString name = "Foo";
query.prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE :surname");
query.bindValue(":surname", QString("%%1%").arg(name));
query.exec();
while(query.next())
qDebug()<< query.value(0) << query.value(1);
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
add a comment |
You do not have to use "%" in the prepare but concatenate the QString, on the other hand it is not necessary so far I have not needed to use a QSqlQuery pointer so I recommend not using it since it has a copy constructor.
QSqlQuery query;
QString name = "Foo";
query.prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE :surname");
query.bindValue(":surname", QString("%%1%").arg(name));
query.exec();
while(query.next())
qDebug()<< query.value(0) << query.value(1);
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
add a comment |
You do not have to use "%" in the prepare but concatenate the QString, on the other hand it is not necessary so far I have not needed to use a QSqlQuery pointer so I recommend not using it since it has a copy constructor.
QSqlQuery query;
QString name = "Foo";
query.prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE :surname");
query.bindValue(":surname", QString("%%1%").arg(name));
query.exec();
while(query.next())
qDebug()<< query.value(0) << query.value(1);
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
You do not have to use "%" in the prepare but concatenate the QString, on the other hand it is not necessary so far I have not needed to use a QSqlQuery pointer so I recommend not using it since it has a copy constructor.
QSqlQuery query;
QString name = "Foo";
query.prepare("SELECT Name, Surname FROM employee WHERE Surname LIKE :surname");
query.bindValue(":surname", QString("%%1%").arg(name));
query.exec();
while(query.next())
qDebug()<< query.value(0) << query.value(1);
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
answered Nov 16 '18 at 17:47
eyllanesceyllanesc
87.8k103564
87.8k103564
add a comment |
add a comment |
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