Check Constraint Across Parent-child Tables

Jul 20, 2005

Hi,

DDLs and DMLs:
create table #job (jobID int identity(1,1) primary key, jobName
varchar(25) unique not null, jobEndDate dateTime, jobComplete bit
default(0), check (([JobEndDate] is null and [JobComplete] = 0) OR
([JobEndDate] is not null and [JobComplete] = 1)));

Q1 with check constraint:
sample dagta
insert into #job (jobName)
values('first job');

transaction A
update #job
set jobEndDate = '12/19/2003', JOBCOMPLETE=1
where jobID = 3;
RESULTSET/STATUS = Success

update #job
set jobEndDate = NULL, JOBCOMPLETE=0
where jobID = 3;
RESULTSET/STATUS = Success

transaction C
update #job
set jobEndDate = '12/19/2003'
where jobID = 3;
RESULTSET/STATUS = Failure

how come check constraint can't set a value which is preset in the
check constraint? If it's the way how it works with MS SQL Server
2000, well, IMHO, it's limiting because the above transaction C is a
valid one. Or maybe check constraint is not fit for this purpose?

Maybe, it doesn't make much sense for me to go into Q2 but I'll try
-- create job's child table, task
create table #task (taskID int identity(1,1) primary key, taskName
varchar(25) unique not null, taskEndDate dateTime, taskComplete bit
default(0), jobID int not null references #job (jobID));
-- skip check constraint for taskEndDate and taskComplete for now

Now, the Business Rule says,
1) if all tasks are complete then automatically set jobComplete for
the #job table to yes;
2) the jobEndDate in the #job table must be >= the last/Max
taskEndDate

I tend to think trigger would slow down data update quite a bit, so,
try to stay away for this purpose if possible.

Always appreciate your idea.

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Transact SQL :: Parent / Child Tables - Pivot Child Data To Parent Row

May 19, 2015

Given the sample data and query below, I would like to know if it is possible to have the outcome be a single row, with the ChildTypeId, c.StartDate, c.EndDate being contained in the parent row.  So, the outcome I'm hoping for based on the data below for ParentId = 1 would be:

1 2015-01-01 2015-12-31 AA 2015-01-01 2015-03-31 BB 2016-01-01 2016-03-31 CC 2017-01-01 2017-03-31 DD 2017-01-01 2017-03-31

declare @parent table (Id int not null primary key, StartDate date, EndDate date)
declare @child table (Id int not null primary key, ParentId int not null, ChildTypeId char(2) not null, StartDate date, EndDate date)
insert @parent select 1, '1/1/2015', '12/31/2015'
insert @child select 1, 1, 'AA', '1/1/2015', '3/31/2015'

[Code] .....

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Jul 20, 2005

In our database we have a list of devices in a "Device" Table, eachhaving one or more IP's located in the "IP" Table linked through aforein key on the DeviceID Column.I would like to retrieve this information as SuchDeviceID IpAddress1 10.0.0.1, 10.0.0.2, 10.0.0.32 ...345etc.Is it possible to do that without using cursors? Through a query?

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Nov 8, 2005

Greetings,I just wanna know if anyone can tell me how to get all user definedtables in parent-then-child manner. I mean all the parents should belisted first and then childs.I dont think there is any direct way to do this, but i am not able toform any sort of query to achieve this.Any help will be greatly appreciated.TIA

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Nov 16, 2006

hello -

i am trying to figure out how i can create an SSIS package to insert into multiple tables. After the first insert, I want to take the ID created (an Identity column) and then use that to insert into other associated (foreign key) tables.

For example, I have a table Users. The primary key is an Identity column. Once the SSIS insert is complete, the bulk load of new users has an identity ID value for each row. What I want to do, during the same SSIS package, is to take each row as it is inserted and add rows to other tables. Like, UserDepartment - it has a foreign key for the user id and a foreign key to the department being added. And, as part of this I will need to get the latest ID value and possibly some other values and store them in variables.

I looked at multi-cast, but I don't know/think that this will work for me.

does anyone know of a good example or article like this?

thanks
- will

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Jun 15, 2006

Supose I have two records in a parent-child relationsuip (actually I have many more such records). Does SSIS offer any support ask for inserting one record into the parent table, the other into the child table, and updating the foreign key of the child to point to the parent?

TIA,

Barkingdog

P.S. I have to do just this as part of the datawarehouse test I'm running. Seems like a common task but I don't recall anything in SSIS addressing the issue.







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Feb 29, 2008

My Question: Does anyone know of a decent way (i.e. I do not want to loop to insert each row and check the SCOPE_IDENTITY() field or anything like that) to copy parent/child rows to their same respective table besides using the method I have listed below (my manager does not really like the idea of the "PreviousID" field)? More details are listed below.



My Table Situation: I have a parent table and a child table. Both tables have an identity column as the primary key. The relationship between the tables is established using the parent table's primary key to the column in the child table that stores the relationship. The identity column in both tables is the only column that is unique in the tables.

Sample Data (made up and simplified for visualization purposes):
ParentTable - "Items"
ID ItemCategory Price
1,T-Shirt,$20
2,Blue Jeans,$50
3,T-Shirt,$40

ChildTable - "Components
ID ItemID Component
1,1,Fabric
2,1,ScreenPrinting
3,2,Fabric
4,2,Zipper
5,3,ThickFabric
6,3,ScreenPrinting
7,3,Elastic

My Need: I need to make a copy of the records (keeping the parent/child relationship intact) to the same table as the source records. For example, in my data example above, I may need to make a copy of all the "T-Shirt" items and their child records. As the parent records are copied, they will be assigned new keys since the primary key is an identity. Obviously, this new key needs to be used when creating the child records, but I need to somehow associate this new key to the new child records.

Possible Solution: I know this can be achieved by adding another column to the parent table to store the "PreviousID" (INT NULL). Using this new field, when I want to copy the "T-Shirt" items, I would insert the new records and store the ID of source records (i.e. the identity value of the row that was copioed would be stored in this "PreviousID" field). Once the parent record has been copied, I could then insert the child records, and I could join on the "PreviousID" field to get to the new ID to use for inserting the copies of the child records.

Thanks for reading this and for any help offered.

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Nov 13, 2006

I am trying to insert data into two tables with a SSIS package. One table has a foreign key relationship to the other table's primary key. When I try to run the package, the package will just seems to hang up in bids. I have found two ways around the issue but I don't like either approach. Is there a way to set which table gets insert first?

If I uncheck the check constraints option on the child table, the package will run very quickly but this option alters the child table and basically disables the constraint. I don't like this option because it is altering the database.

The second approach is to set the commit level on both tables to say 10,000 and make sure that the multicast component has the first output path moved to the parent table. I don't like this option because I am not sure if the records are backed out if the package should abend after records have been committed.

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Mar 5, 2008

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Apr 8, 2015

I have a database with many tables. I would like to Delete all rows with practiceID=55 from all Parents tables and all corresponding rows from its child tables. Tables are linked with foreign key constraints (but there is no ON DELETE CASCADE).

How to write a generalized code for removing rows from both parent and child tables.

Query should pick parent table one by one and delete rows with practiceID=55 and all corresponding rows from its child tables

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Apr 20, 2015

I have used Aasim Abdullah's (below link) stored procedure for dynamically generate code for deletion of child tables based on parent with certain filter condition. But I am getting a output which is not proper (Query 1). I would like to have output mentioned in Query 2.

Link:

[URL]

--[Patient] is the Parent table, [Case] is child table and [ChartInstanceCase] is grand child

--When I am deleting a grand child table, it should be linked to child table first followed by Parent

--- query 1

DELETE Top(100000) FROM [dbo].[ChartInstanceCase]
FROM [dbo].[Patient] INNER JOIN [dbo].[Case] ON [Patient].[PatientID] = [Case].[PatientID]
INNER JOIN [dbo].[ChartInstanceCase] ON [Case].[CaseID] = [ChartInstanceCase].[CaseId]
WHERE [Patient].PracticeID = '55';

--Query 2

DELETE Top(100000) [dbo].[ChartInstanceCase]
FROM [dbo].[ChartInstanceCase] INNER JOIN [dbo].[Case] ON [ChartInstanceCase].[CaseId]=[Case].[CaseID]
INNER JOIN [dbo].[Patient] ON [Patient].[PatientID] = [Case].[PatientID]
WHERE [Patient].PracticeID = '55';

how to modify the SP 'dbo.uspCascadeDelete' to get the output as Query 2.

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Transact SQL :: Order Change In Parent To Its Child Tables Using FK Relations?

Apr 20, 2015

I have used Aasim Abdullah's (below link) stored procedure for dynamically generate code for deletion of child tables based on parent with certain filter condition. But I am getting a output which is not proper (Query 1). I would like to have output mentioned in Query 2.

Link: [URL]

--[Patient] is the Parent table, [Case] is child table and [ChartInstanceCase] is grand child

--When I am deleting a grand child table, it should be linked to child table first followed by Parent

--- Query 1

DELETE Top(100000) FROM [dbo].[ChartInstanceCase]
FROM [dbo].[Patient] INNER JOIN [dbo].[Case] ON [Patient].[PatientID] = [Case].[PatientID]
INNER JOIN [dbo].[ChartInstanceCase] ON [Case].[CaseID] = [ChartInstanceCase].[CaseId]
WHERE [Patient].PracticeID = '55';

--Query 2

DELETE Top(100000) [dbo].[ChartInstanceCase]
FROM  [dbo].[ChartInstanceCase] INNER JOIN [dbo].[Case] ON [ChartInstanceCase].[CaseId]=[Case].[CaseID] 
INNER JOIN
[dbo].[Patient] ON [Patient].[PatientID] = [Case].[PatientID]
WHERE [Patient].PracticeID = '55';

how to modify the SP 'dbo.uspCascadeDelete' to get the output as Query 2

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Apr 17, 2007

I don't know if this is the right forum but...



In a parent/child table structure (order/orderdetail) I have used identity columns for the orderdetail or compund primary keys. I find a single identity column on the detail table easier to manage (with a fk to the parent) but what ends up bieng easiest for the user is to have an order (say #3456) and detail items listed sequentially from 1 to n. This reflects a compound key structure but generating the 2nd field is a pain. Is there any way to tie an identity field to the parent key so that it will generate this number for me automatically?

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May 8, 2008

What query gives me the list of child tables accessing a unique key (But Not PK) for a given table?

For. E.g. In the folloiwng scenario I should get o/p as t3

create table t1 (id1 int primary key , id2 int unique )

create table t2 (id1 int references t1(id1))
create table t3 (id2 int references t1(id2))


------------------------
I think, therefore I am - Rene Descartes

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Jul 25, 2014

Basically i have three Tables

Request ID Parent ID Account Name Addresss
1452 1254789 Wendy's Atlanta Georgia
1453 1254789 Wendy's Norcross Georgia
1456 1254789 Waffle House Atlanta Georgia

Bid_ID Bid_Type Bid_Volume Bid_V Bid_D Bid_E Request_ID Parent ID
45897 Incentive 10 N/A N/A N/A 1452 1254789
45898 Incentive 10 N/A N/A N/A 1453 1254789
45899 Incentive 10 N/A N/A N/A 1456 1254789

Bid_Number Bid_Name Request_ID Parent ID
Q789456 Wendy'Off 1452 1254789
Q789457 Wendy'Reba 1452 1254789
Q789456 Wendy'Off 1453 1254789
Q789457 Wendy'Reba 1453 1254789
Q789456 Wendy'Off 1456 1254789

I want the Result

Parent ID Bid_Type Bid_Volume Bid_V Bid_D Bid_E AutoGeneratedCol
1254789 Incentive 10 N/A N/A N/A 1
1254789 Incentive 10 N/A N/A N/A 2
Bid Number AutoGeneratedCol_Link
Q789456 1
Q789457 1
Q789456 2
Request ID AutoGeneratedCol_Link
1452 1
1453 1
1456 2

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Jun 26, 2015

I have a table with below kind of data,

DECLARE @TBL TABLE (ItemId INT IDENTITY(1,1), ItemName NVARCHAR(20), ItemDate DATE, ParentItemName NVARCHAR(20), ItemOrder INT, ReportId INT)
INSERT INTO @TBL (ItemName, ItemDate, ParentItemName, ItemOrder, ReportId)
VALUES ('Plan', '2015-06-01', NULL, 1, 20),('Design', '2015-06-01', NULL, 2, 20),('Test', '2015-06-20', NULL, 3, 20),('Complete', '2015-06-30', NULL, 4, 20),
('Design child A', '2015-06-02', 'Design', 1, 20), ('Design child B', '2015-06-01', 'Design', 2, 20),
('Test child A', '2015-06-10', 'Test', 1, 20), ('Test child B', '2015-06-09', 'Test', 2, 20), ('Test child C', '2015-06-08', 'Test', 3, 20),
('Test grand child A', '2015-06-08', 'Test child B', 1, 20), ('Test grand child B', '2015-06-08', 'Test child B', 2, 20)
select * from @TBL

Here I want,

1. to display all parent with ORDER BY ItemOrder (no need to sort by ItemDate)
2. display all child row right after their parent (ORDER BY ItemOrder if ItemDate are same, else ORDER BY ItemDate)
3. display all grand child row right after their parent (ORDER BY ItemOrder if ItemDate are same, else ORDER BY ItemDate)

Looking for below output ...

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Huh?

I've got good RI data...BUT..a developer loaded the tables in alpha table order....

Such that the child loaded BEFORE the parent....

Huh?

Got a test being set up now to mess with the child file to add a key that doesn't exist in the parent...

But Why is this allowed?

In DB2 you can specify

LOAD DATA REPLACE NO CHECK....

On the load card...you then need to run a check after to verify the data...

Is that what's going on? Is there such a utility in SQL Server to run a check post load?

I'm confused....

Any comments appreciated.

Thanks



Brett

8-)

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Feb 25, 2008

hi,
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here is my code,but i don't know why it isn't working !
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thanks in advance :)
           
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Jul 16, 2005

I have a parent/child relationship in a relational database broken out like this:
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The parent references the category_id in the same table to create the parent/child relationships. I can get all the bottom level categories by doing this:
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Each bottom-level category has a count attached to it.
The problem I have is getting the counts rolled up for each parent of the bottom level. A parent could/will have multiple bottom-level categories (and counts).
My sql is a little weak, could you help me out?  I can utilize everying in SQL 2000 (stored proc, UDF, anything).
Thanks!

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Jul 1, 2007

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ParentID ChildID
-------------------------
10 8
8 6
8 7
7 2
7 5
5 1
5 2
6 2

child of parent if input 10
8
7
6
2
2
5
1
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input 7
2
5
1
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7
2
5
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Plz help we to write the sql statements

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Aug 2, 2007

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Id | parent_id
---+-----------
1 | 0
2 | 0
3 | 0
4 | 1
5 | 1
6 | 4
7 | 4
8 | 7
9 | 7


This structure requires complicated queries (recursive call) to find out all the child of a root node, so I have added another field for the root id.
Is this a good relational database design ? kindly suggest.

Id | parent_id | root_id
---+-----------+---------
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 | 1
5 | 1 | 1
6 | 4 | 1
7 | 4 | 1
8 | 7 | 1
9 | 7 | 1
10 | 2 | 2
11 | 2 | 2
12 | 10 | 2
13 | 10 | 2

Rgds
Vijay

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Jun 28, 2004

Hello all, I'm having a real hard time trying to figure this one out. I'm trying to create a sql query that selects both the parent name and it's children, but it's got to loop through all the record sets to populate a drop down as an end result.

I think I thought this out correctly:
I have 2 tables

category
relationship

tbl category
cat_id //auto int
cat_name // varchar

relationship
r_id // auto int
parent_id // int
child_id // int

both the parent_id and child_id are associated with the cat_id
in my category table I could have
1cars // this is parent
2 audi
3 bmw
4 chevy

Table data example

r_id parent_id child_id
****************************
1 1 15
2 1 16
3 1 17
4 2 55
5 2 56
etc...
I want to select both the parent cat_name from category and also select the child cat_name where the parent_id = #

I can do it manaully like this
select cat_name, cat_id, parent_id , child_id from category, relationships where child_id = cat_id and parent_id = 1

what is the best way to loop through all the parent ids to find child category?
Could this be done in a stored procedure?

thanks in advance.

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May 9, 2006

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Jul 26, 2007

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For example:

Parent
{
ID_PK,
Name,
PhoneNum,
Address
}

Child
{
ID_PK,
ParentID_FK,
Name
}

The view would return a dataset like this:

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Jason Jones, (666)666-6666, 54332 South Ave, Brian, Steven
Kay McPeak, (777)777-7777, 9876 Division NW, Kathy, Sally, Karen, Deb, Becky, Kendra, Ann, Edward

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Then I would like to be able to query against this view with something like this:

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Is this possible without using a cursor?

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Mar 23, 2014

Below is my sample data of my table named "Groups"

Code:
with Groups as (
select 1 as GroupId,'Oracle' as GroupName,0 as IdParentGroup union all
select 2 as GroupId,'Microsoft' as GroupName,0 as IdParentGroup union all
select 3 as GroupId,'IBM' as GroupName,0 as IdParentGroup union all
select 4 as GroupId,'SunMicrosystem' as GroupName,1 as IdParentGroup union all
select 5 as GroupId,'peoplesoft' as GroupName,1 as IdParentGroup union all
select 6 as GroupId,'mysql' as GroupName,1 as IdParentGroup union all
select 7 as GroupId,'Nokia' as GroupName,2 as IdParentGroup union all
select 8 as GroupId,'EShop' as GroupName,2 as IdParentGroup union all
select 9 as GroupId,'Meiosys' as GroupName,3 as IdParentGroup union all
select 10 as GroupId,'UrbanCode' as GroupName,3 as IdParentGroup )
select * from groups;

Expected result:

Code:
with ExpectedResult as (
select 'Oracle' as GroupName,'SunMicrosystem' as SubGroup union all
select '' as GroupName,'peoplesoft' as SubGroup union all
select '' as GroupName,'mysql' as SubGroup union all
select 'Microsoft' as GroupName,'Nokia' as SubGroup union all
select '' as GroupName,'EShop' as SubGroup union all
select 'IBM' as GroupName,'Meiosys' as SubGroup union all
select '' as GroupName,'UrbanCode' as SubGroup )
select * from ExpectedResult;

some sample query to how to achieve this parent-child has the same table.

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Hello all gurus out there.

I'm an entre level junior programmer. My question is kind of confusing but I'll try to put it as simple as I can.

First we have a main table called "job1". This table consists the order information. The file_id is the unique id and the primary key for this table. This table also pertains other information such as customer data (max limit 5), job data etc. This table is actively (non-stop) used throughout the day.

We have a non-interactive process which will take customers information from the main table and insert into the child table table "jobcust". Jobcust would have file_id, cust, cust_type. For example, if Job1 table had fiel_id=100 and cust1="Tom" and Cust2="David", now Jobcust will have two records file_id, cust1 and file_id,cust2. The main problem is the child table needs to be updated right away and our non-interactive process is good at doing that.. but it is causing a major DATA LATENCY. I would like to ask you all, if you know any better way of doing this without any process.. like in the back end with a trigger/procedure or something like that.

All you help is appreciated.

Thanks much.

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WHERE NOT EXISTS
(SELECT *
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WHERE a.MemberID IN (b.MemberID));

Now I'm trying to delete all those child records instead of just selecting them so I tried...

Delete MemberID
FROM memtype AS a
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(SELECT *
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WHERE a.MemberID IN (b.MemberID));

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WITH Org_TREE AS (
SELECT *, null as 'IS_DELETED', convert (varchar(4000), convert(varchar(30),CREATED_DT,126) + Org_Id) theorderby
FROM Organization WHERE PARENT_Org_ID IS NULL and case_ID='43333'

[code]...

I need to modify the query:

1. To display the records both from the Organization table and Organization_Log table.
2. The orderby should be sorted on 'Organization Name' asc and it should follow the child order in alpha sort as well.

E.g.:

aaa
==>fff
==>ggg
bbb
==> aaa
==> hhh
eee
==> ccc
==> ddd
==> fff

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Thanks

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hello there,

I think I might know the answer to this, but I wanted to see if any one has come up with a slick idea for enforcing this relationship. If I have two tables and one is dependent on the other (parent-child relationship), how can I enforce that every parent record has a corresponding child record? Here is a code example


USE tempdb

GO

CREATE TABLE dbo.Parent
(
ParentId int NOT NULL
)

ALTER TABLE dbo.Parent ADD CONSTRAINT PK_Parent PRIMARY KEY CLUSTERED (ParentId)


CREATE TABLE dbo.Child
(
ParentId int NOT NULL
,ChildId int NOT NULL
)

ALTER TABLE dbo.Child ADD CONSTRAINT PK_Child PRIMARY KEY CLUSTERED (ParentId, ChildId)

ALTER TABLE dbo.Child ADD CONSTRAINT FK_Child_Parent FOREIGN KEY (ParentId)
REFERENCES dbo.Parent(ParentId)

INSERT INTO dbo.Parent VALUES (1)
INSERT INTO dbo.Child VALUES (1,1)
INSERT INTO dbo.Parent VALUES (2)
INSERT INTO dbo.Child VALUES (2,2)
INSERT INTO dbo.Child VALUES (2,1)
INSERT INTO dbo.Parent VALUES (3)


SELECT
p.ParentId, 'I SHOULD HAVE A DEPENDENT RECORD'
FROM
dbo.Parent p
LEFT JOIN
dbo.Child c
ON
p.ParentId = c.ParentId
WHERE c.ParentId IS NULL



ParentId 3 should have a child record associated with it. I am assuming that these are my choices:

1) code all inserts to the parent table along with a insert to the child table and wrap those in a transaction

2) place a trigger for insert on the parent table that ensures that the child table is populated after data for the parent.

Here is the gotcha, we will be using a middle-tier data access layer (nhibernate or dlink) so .NET application developers will be creating the data modifications at the transactional level. Also there might be several ongoing ETLs that populate this schema as well, so multiple points of entry and seperate code blocks. I don't want to hide business logic within triggers.

I assume that all our coders are competent and could enforce this properly via code, but I know that mistakes happen. Has any one come across this situation and have a solution for enforcing the integrity of the schema with constraints?

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