Rasande: Qsqlquery Batch Insert

Qsqlquery Batch Insert

Qsqlqueryvalue returns a qvariant a type that can hold various c and core qt data types such as int qstring and qbytearray. Qsqlquery encapsulates the functionality involved in creating navigating and retrieving data from sql queries which are executed on a qsqldatabase.

From Robert Wood At Apostrophe Co Uk Mon Feb 1 00 29 53 2010

If you want to insert many records at the same time it is often more efficient to separate the query from the actual values being inserted.

Qsqlquery batch insert. This can be done using placeholders. Qsqlquery encapsulates the functionality involved in creating navigating and retrieving data from sql queries which are executed on a qsqldatabase. It can be used to execute dml data manipulation language statements such as select insert update and delete as well as ddl data definition language statements such as create table.

It can be used to execute dml data manipulation language statements such as select insert update and delete as well as ddl data definition language statements such as create table. It can be used to execute dml data manipulation language statements such as select insert update and delete as well as ddl data definition language statements such as create table. We observed that another c lib soci outperforms qt sql in speed dramatically when inserting 1000000 records at least on windows with odbc and postgresql.

With this solution i am able to insert 663581 data in one second much faster than execbatcharound 180 data in one second. It can be used to execute dml data manipulation language statements such as select insert update and delete as well as ddl data definition language statements such as create table. The string to decimal data type conversions used in bulk insert follow the same rules as the transact sql convert function which rejects strings representing numeric values that use scientific notation.

Both of them have the same pragma setting. Therefore bulk insert treats such strings as invalid values and reports conversion errors. Queryexecinsert into employee id name salary values 1001 thad beaumont 65000.

Qsqlquery encapsulates the functionality involved in creating navigating and retrieving data from sql queries which are executed on a qsqldatabase. Hi currently we are evaluating a dbms abstraction library and we are looking into qt sql. The qsqlqueryvalue function returns the value of a field in the current record.

Pragma synchronous off pragma journalmode memory. The different database types are automatically mapped into the closest qt equivalent. Qsqlquery encapsulates the functionality involved in creating navigating and retrieving data from sql queries which are executed on a qsqldatabase.

Fields are specified as zero based indexes.

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