| [Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | 
Database access layer
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FmtBCD,  | 
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BCD support  | 
MaskUtils;  | 
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Mask string support  | 
The db unit provides the basis for all database access mechanisms. It introduces abstract classes, on which all database access mechanisms are based: TDataset representing a set of records from a database, TField which represents the contents of a field in a record, TDatasource which acts as an event distributor on behalf of a dataset and TParams which can be used to parameterize queries. The databases connections themselves are abstracted in the TDatabase class.