Requirement N:M object relational mapping:
N:M relations in models shall be properly mapped to SQL tables. If here is an N:M relation between
class A and B a link table ABlink shall be used that has four columns - AOid, AKey, BOid and BKey.
These four columns are automatically updated any time an A or B item is

• created
• read
• updated
• deleted

The table creation command for the mapping table is automatically generated.