Database Classes▲
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					QSql: The QSql namespace contains miscellaneous identifiers used throughout the Qt SQL module. 
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					QSqlDatabase: The QSqlDatabase class handles a connection to a database. 
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					QSqlDriver: The QSqlDriver class is an abstract base class for accessing specific SQL databases. 
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					QSqlDriverCreator: The QSqlDriverCreator class is a template class that provides a SQL driver factory for a specific driver type. 
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					QSqlDriverCreatorBase: The QSqlDriverCreatorBase class is the base class for SQL driver factories. 
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					QSqlError: The QSqlError class provides SQL database error information. 
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					QSqlField: The QSqlField class manipulates the fields in SQL database tables and views. 
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					QSqlIndex: The QSqlIndex class provides functions to manipulate and describe database indexes. 
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					QSqlQuery: The QSqlQuery class provides a means of executing and manipulating SQL statements. 
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					QSqlQueryModel: The QSqlQueryModel class provides a read-only data model for SQL result sets. 
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					QSqlRecord: The QSqlRecord class encapsulates a database record. 
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					QSqlRelationalTableModel: The QSqlRelationalTableModel class provides an editable data model for a single database table, with foreign key support. 
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					QSqlResult: The QSqlResult class provides an abstract interface for accessing data from specific SQL databases. 
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					QSqlTableModel: The QSqlTableModel class provides an editable data model for a single database table. 




