text: alter table ACT_ID_MEMBERSHIP 
      drop constraint ACT_FK_MEMB_GROUP;
      
  alter table ACT_ID_MEMBERSHIP 
      drop constraint ACT_FK_MEMB_USER;
      
  if exists (select TABLE_NAME from INFORMATION_SCHEMA.TABLES where TABLE_NAME = 'ACT_ID_INFO') drop table ACT_ID_INFO;
  if exists (select TABLE_NAME from INFORMATION_SCHEMA.TABLES where TABLE_NAME = 'ACT_ID_MEMBERSHIP') drop table ACT_ID_MEMBERSHIP;
  if exists (select TABLE_NAME from INFORMATION_SCHEMA.TABLES where TABLE_NAME = 'ACT_ID_GROUP') drop table ACT_ID_GROUP;
  if exists (select TABLE_NAME from INFORMATION_SCHEMA.TABLES where TABLE_NAME = 'ACT_ID_USER') drop table ACT_ID_USER;
  