dbExpress/No key specified
问题 I am working on a database program, using the dbExpress components (Delphi 7). The data is retrieved from the database via the following components: TSQLDataSet -> TDataSetProvider -> TClientDataSet -> TDatasource -> TDBEdit. Until now, the form has worked correctly. The query in the TSQLDataset is select id, name, byteken, timeflag from scales where id = :p1 I added a large (2048) varchar field to the database table; when I add this field to the above query (and connect either a TDBMemo or a