Delphi Adoquery cannot update the location row problem (other database access controls are similar)

When a database is logged using Adoquery in Delphi, it is sometimes reported that the row cannot be positioned for updates. Some values may have been changed since the last read "this error."

This error is usually the record of your operation has been modified in the database,

Such as:

1. has been deleted in the database, you have updated the deleted records with Adoquery
2. The database table field has a default value, and you can use Adoquery to insert a new record without re-querying it again to manipulate the record again

There are two possible causes of this error to be known for the time being, and it is summed up that Adoquery records do not correspond to database table records.