Improving the code by applying the standards of style and design
Implementing class QueryStrategy
Implementing class QueryHelper
Implementing class QueryInsert
Implementing Query class and extending it through the QueryInsert
Implementing the construction method of a columns configuration list
Implementing equalizeQuantities( ) method in the Query class
Implementing class QueryUpdate
Implementing class QueryDelete
Implementing class QuerySelect
Implementing auxiliary methods for the construction of SQL clauses
Using methods that build SQL clauses
Fixing details in subclasses of class Query
Adding the strategy pattern implemented in application
Adding the strategy pattern implemented in application
merging query_strategy in gof_desging_patterns