diff --git a/db/P8PNL_JB_JOBS.sql b/db/P8PNL_JB_JOBS.sql
index ee8b4f9..9fd707f 100644
--- a/db/P8PNL_JB_JOBS.sql
+++ b/db/P8PNL_JB_JOBS.sql
@@ -19,8 +19,8 @@ create table P8PNL_JB_JOBS
   EDITABLE                  number(1) default 0 not null,    -- Признак возможности редактирования (0 - нет, 1 - да)
   CHANGED                   number(1) default 0 not null,    -- Признак наличия изменений, требующих сохранения (0 - нет, 1 - да)
   constraint C_P8PNL_JB_JOBS_RN_PK primary key (RN),
-  constraint C_P8PNL_JB_JOBS_PRN_FK foreign key (PRN) references P8PNL_JB_PRJCTS (RN),
-  constraint C_P8PNL_JB_JOBS_HRN_FK foreign key (HRN) references P8PNL_JB_JOBS (RN),
+  constraint C_P8PNL_JB_JOBS_PRN_FK foreign key (PRN) references P8PNL_JB_PRJCTS (RN) on delete cascade,
+  constraint C_P8PNL_JB_JOBS_HRN_FK foreign key (HRN) references P8PNL_JB_JOBS (RN) on delete cascade,
   constraint C_P8PNL_JB_JOBS_STAGE_VAL check (STAGE in (0, 1)),
   constraint C_P8PNL_JB_JOBS_EDTBL_VAL check (EDITABLE in (0, 1)),
   constraint C_P8PNL_JB_JOBS_CHNGD_VAL check (CHANGED in (0, 1)),
diff --git a/db/P8PNL_JB_JOBSPREV.sql b/db/P8PNL_JB_JOBSPREV.sql
index 9ef7cbc..8eb7a85 100644
--- a/db/P8PNL_JB_JOBSPREV.sql
+++ b/db/P8PNL_JB_JOBSPREV.sql
@@ -9,7 +9,7 @@ create table P8PNL_JB_JOBSPREV
   PRN                       number(17) not null, -- Рег. номер родителя
   JB_JOBS                   number(17) not null, -- Рег. номер предшествующей работы/этапа
   constraint C_P8PNL_JB_JOBSPREV_RN_PK primary key (RN),
-  constraint C_P8PNL_JB_JOBSPREV_PRN_FK foreign key (PRN) references P8PNL_JB_JOBS (RN),
-  constraint C_P8PNL_JB_JOBSPREV_JB_JOBS_FK foreign key (JB_JOBS) references P8PNL_JB_JOBS (RN),
+  constraint C_P8PNL_JB_JOBSPREV_PRN_FK foreign key (PRN) references P8PNL_JB_JOBS (RN) on delete cascade,
+  constraint C_P8PNL_JB_JOBSPREV_JB_JOBS_FK foreign key (JB_JOBS) references P8PNL_JB_JOBS (RN) on delete cascade,
   constraint C_P8PNL_JB_JOBSPREV_UN unique (IDENT, PRN, JB_JOBS)
 );
diff --git a/db/P8PNL_JB_PERIODS.sql b/db/P8PNL_JB_PERIODS.sql
index b3ba077..fdff88c 100644
--- a/db/P8PNL_JB_PERIODS.sql
+++ b/db/P8PNL_JB_PERIODS.sql
@@ -15,7 +15,7 @@ create table P8PNL_JB_PERIODS
   LAB_PLAN_JOBS             number(17,3) default 0 not null, -- Трудоёмкость (план, по графику)
   constraint C_P8PNL_JB_PERIODS_RN_PK primary key (RN),
   constraint C_P8PNL_JB_PERIODS_DATE_VAL check (DATE_FROM <= DATE_TO),
-  constraint C_P8PNL_JB_PERIODS_INS_DEP_FK foreign key (INS_DEPARTMENT) references INS_DEPARTMENT (RN),
-  constraint C_P8PNL_JB_PERIODS_FCMNPWR_FK foreign key (FCMANPOWER) references FCMANPOWER (RN),
+  constraint C_P8PNL_JB_PERIODS_INS_DEP_FK foreign key (INS_DEPARTMENT) references INS_DEPARTMENT (RN) on delete cascade,
+  constraint C_P8PNL_JB_PERIODS_FCMNPWR_FK foreign key (FCMANPOWER) references FCMANPOWER (RN) on delete cascade,
   constraint C_P8PNL_JB_PERIODS_UN unique (IDENT, DATE_FROM, INS_DEPARTMENT, FCMANPOWER)
 );
diff --git a/db/P8PNL_JB_PRJCTS.sql b/db/P8PNL_JB_PRJCTS.sql
index 35b4a65..efb7dd1 100644
--- a/db/P8PNL_JB_PRJCTS.sql
+++ b/db/P8PNL_JB_PRJCTS.sql
@@ -11,7 +11,7 @@ create table P8PNL_JB_PRJCTS
   EDITABLE                  number(1) default 0 not null, -- Признак возможности редактирования (0 - нет, 1 - да)
   CHANGED                   number(1) default 0 not null, -- Признак наличия изменений, требующих сохранения (0 - нет, 1 - да)
   constraint C_P8PNL_JB_PRJCTS_RN_PK primary key (RN),
-  constraint C_P8PNL_JB_PRJCTS_PROJECT_FK foreign key (PROJECT) references PROJECT (RN),
+  constraint C_P8PNL_JB_PRJCTS_PROJECT_FK foreign key (PROJECT) references PROJECT (RN) on delete cascade,
   constraint C_P8PNL_JB_PRJCTS_JOBS_VAL check (JOBS in (0, 1)),
   constraint C_P8PNL_JB_PRJCTS_EDTBL_VAL check (EDITABLE in (0, 1)),
   constraint C_P8PNL_JB_PRJCTS_CHNGD_VAL check (CHANGED in (0, 1)),