Copy and Delete Table with "Foreign Key References(...,...) On Delete Cascade?
Need some serious help with this one...
Am working on completing an ORM that can not only handles CRUD actions -- but that can also updates the structure of a table transparently when the class defs change. Reason for this is that I can't get the SQL scripts that would work for updating a software on SqlServer to be portable to other DBMS systems. Doing it by code, rather than SQL batch has a chance of making cross-platform, updateable, software...
Anyway, because it needs to be cross-DBMS capable, the constraints are that the system used must work for the low...Foreign Key delete cascade
I 'm new in the group and this question may have posted in the past but,
I'm using ASE 12.5,
and I 'm using ALTER TABLE statements to enforce referencial
integrity like :
ALTER TABLE table1
ADD CONSTRAINT fc1_table1_table2
FOREIGN KEY (id1,id2) REFERENCES table2(id1,id2)
Since ASE does not provide FK cascade delete, is there
anything I can do on "Database Level" instead of putting
all code into Application ?
thanks in advance,
Write a trigger to do it on other tables
<Jim> wrote in message
news:F9C486E5ED5CA2150046799...cascade delete of foreign keys?
I came from ASA and in it I can define foreign keys with 'on delete'
keyword. For example
create table groups (
group_id integer not nup primary key,
... other columns);
create table objects (
object_id integer not nup primary key,
group_id integer not null references groups on delete cascade,
... other columns);
This will forbid user to create object with bad group_id, and automaticaly
delete all objects when group is deleted.
How can I do this in ASE 12.5?
In ASE you have to use triggers to implement this functionality.
-----------...cascade delete can not apply to two foreign keys
I have a table that contains two foreign keys of two different tables. I want to build a relationship so that when either primary keys deleted in the two tables, the record in the table should be deleted. But, SQL Server does not allow me to save the relationship, it complains that the circling delete might exist. I do not know why, how can I solve this?
ProductID <foreign key>
CustomerID <foreign key>
ProductID <primary key>
CustomerID <primary key>
I want to cascade delete the record in Table A when...Foreign Key Ultralite Database CASCADE delete and Update
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hello, I got two ultralite tables (Athletes and Penalties),
In table ATHLETES i got the primary key (ID) and in the
table PENALTIES i got the foreign key (ID) related to the
primary key (ID) on table ATHLETES,.., in the Ultralite
Schema Painter i can defined the foreign key but i cannot
defined the cascade delete and update for this foreign key,
how can i do it?
In ASA you can defined the cascade delete and update for a...Upgraded to version 11 and now Foreign Keys are not Cascading the deletes
Our customer upgraded to version 11 of SQL Anywhere from 9. There are a
number of tables that compose a master detail relationship. The
database was designed to use the foreign key relationship between the 2
tables to cascade the deletes when the master (primary_key) was deleted,
in that the action for Delete was set to Cascade. Now with version 11 an
SQL error (23000) is generated for the reference of the foreign key in
the detail table when deletes occur.
I read the help file and did not see any "changes in behavior" which
would effect this. I did notice thaty w...Delete on Cascade in Trigger
I want to do a deletion on cascade in trigger.
When I execute this command :
DELETE FROM ENTIDADE WHERE ENTCOD = '02346'
I receive this message:
Server Message: Number 547, Severity 16
Dependent foreign key constraint violation in a referential integrity
constraint. dbname = 'apolo', table name = 'entidade', constraint name =
Can I delete a child table in trigger ?
This is my code:
--------------------...Cascading Deletes With Other Triggers
Cascading deletes have stopped working since I added a trigger to
(almost) every table in my database. The new trigger is called before
the delete and writes an entry to a 'deletions log table'. But there
is no foreign key relationship between the 'deletions log table'
and the other tables.
After some investigation, I have identified that a cascading delete
works where my extra trigger exists only on the detail table. If the
'deletions log' trigger is added to the master table, the cascading
delete fails with the message "Primary key for row in tab...delete cascade trigger problem
...Cascade deletes in SQL 2005
I have a logins table, a loginroles table (intermediate), and a roles table
When I delete a login from logins I need to delete the roles for that login from loginroles. I know I have to use cascade deletes, but I cannot find the option in sql 2005.
Any help would be appreciated.
It is there even in Express edition, you should see enable DRI(declarative referential integrity) at the top of Management Studio. BTW SQL Server 2005 also comes with the other two ANSI SQL definition DRI SET NULL and SET DEFAULT. Try the links below for more from Microsoft ...Is Cascading deletes prefered to deleting thru a stored procedure?
I have a situation in which I have three tables - 'Table1', 'Table2' and 'Table3'.
'Table1' is a primary table for 'Table2' so that the the primary key of 'Table1' is a foreign key in 'Table2'. In the same way, 'Table1' is also the primary table for 'Table3'.
If I delete a row in 'Table1' then I could automatically let SQL Server also delete the related rows in 'Table2' and 'Table3' through 'cascading delete' option. Or I could run a trigger or stored procedure for deleting related rows in 'Table2' and 'Table3'. Which of these methods would be quicker? Also would cascading deletes option a...delete cascade
I'm trying to add delete cascade to an already-existing table via ISQL. I'm
getting a syntax error:
alter table carrier on delete cascade;
Error = syntax error near 'on'
Should I be able to do this?
I'm running on Windows 2000 Pro, SQLAnywhere 5.5.03, using DBENG50.EXE.
It should be something like:
alter table carrier drop foreign key fk1
alter table carrier add foreign key fk1 references ... etc ... on delete
Then when the row in the fk1 table is deleted the row in the "carrier" table
will be deleted also.
In SQL Central, how do I set sqlanywhere to enforce referential integrety
delete all foreign keys when a record is deleted?
Thanks for any help,
>In SQL Central, how do I set sqlanywhere to enforce referential integrety
>and delete all foreign keys when a record is deleted?
To create a foreign key you can click on the "Add foreign Key" line
to start a fkey creation wizard. To change the properties of an
existing foreign key definition, Right click on the foreign key and
choose Properties. Click the 'Integrity' tab. Under "de...Cascading Deletes
In PowerDesigner 9.5.2, is it possible to have all relationships in the PDM
which have cascading deletes highlighted in a different color than the
others. I'm hoping there is a way other than manually changing the color on
If you can handle a little VB Script writing, you can do it.
There are a few sample scripts to start with. What you will need to do is:
Spin through all of the references.
For each, if the type is on delete cascade, then set the color attribute to
It really shouldn't be a lot of coding. If you need help, post back here