Parent To Child Mappings Identification In A Single Query
Aug 12, 2007
Hi,
I want to retrive the output in a single SQL query.
I had two columns in a table; I used some values of column1 in column2.
I want to identify all the column1 vlaues in Left Hand side and column2 values in Right Hand side, with a single query.
example:
MasterTable
ParentRow ChildRow
--------- --------
A B
C D
E F
G C
H E
M G
Output required:
ParentRow ChildRow
--------- --------
A B
C D
E F
G D (C mapped tfrom D)
H F
M D (G mapped from C, and C mapped from D)
To get the above output, I written query using WHILE...[BREAK|CONTINUE] concept until I get @@rowcount become zero.
I am looking for better performace and to get the output in a single query, instead of multiple passes.
Can any one suggest good tools and articles on performance tuning techniques?
Thanks
Sreekanth
View 6 Replies
ADVERTISEMENT
Mar 12, 2008
Hi,
i have 2 Tables. i am saying emails in table1 and also if there is any attachments there i saved them also in the same table but with differet ID, and in another table i am saving the relationship of both documents.
Now i have defined another table in which i want to store a single New ID generated by the new Table to email document and it's attachment document..
what i am now doing i just create a SP, and it's take the first record from the main table and check if there is attachments , if no then it's just assign a new ID and save the document id into newly created table, but if there is attachement then it's go to relationship table and returen me the child id on behalf of parent ID and then in the newly created table it save the child docment id with the same id as the parent id has already been saved.
i m doing like this
SELECT all the emails those has attachments..
Insert Into newlyCreated Table (ID,doc)values(1,1)
then SELECT doc from Relationship table where Maintable doc=@doc
Insert into newlycreated tAble(ID,doc)values(1,2)
and so on .. and if i have more then one attachement then i have to use the loop..
what i m looking , is there any short way to do this all, bcoz it's taks ages to do.. is there any single line query that i can use to get the child doc id rather then going into loops ..
Thanks ....
View 7 Replies
View Related
Nov 10, 2013
I have a table called "College". In a table, I have to create a structure for multilevel parent-child relationship
For Example,
1) State has number of colleges, Number of colleges has Number of dept. , Number of dept. has no. of subjects, no. of subject has number of chapters and the hierarchy goes on.
Expected Output is,
College 1
Dept 1
subject 1
subject 2
subject 3
Dept 2
Dept 3
[Code] ....
I tried in so many ways, I do not know how to query in single table.
View 6 Replies
View Related
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] .....
View 6 Replies
View Related
Sep 18, 2014
I've 2 tables QuestionAnswers and ConditionalQuestions and fetching data from them using CTE join and I'm seeing repetitive rows (not duplicate) like, If you have multiple answers for 1 question, the output is like
where london
where paris
where toronto
why us
why japan
why indonesia
I want to eliminate the repetitive question and group them as parent child items.
with cte as (
select cq.ConditionalQuestionID from ConditionalQuestions cq
inner join QuestionAnswers qa on cq.QuestionID=qa.QuestionID where cq.QuestionID=5 and qa.IsConditional='Y')
select distinct q.Question, a.Answer from QuestionAnswers qa
inner join Answers a on a.AnswerID = qa.AnswerID
inner join Questions q on q.QuestionID = qa.QuestionID
inner join cte c on c.ConditionalQuestionID = qa.QuestionID;
View 4 Replies
View Related
Apr 8, 2015
Include children and exclude children in a single hierarchy in parent child dimension in mdx
*12-parent
**20-parent
- 9-parent
--250-child1
--210-child2
--240-child3
aggregation of 12-parent only
aggregation of 20-parent only
aggregation of 9 with children
View 3 Replies
View Related
Oct 31, 2015
I have a Recursive CTE for TFS database which gives me below results:
Parent (User Story) level 0
-------------.Task(Dev) and ask(QA) --
level 1
BUG level 2
---------------Task (Dev) and Task(QA)
level2
So, My ParentID column keeps two ParentId one for User story which keeps the child tasks and child bugs and another for Bug Child tasks
I need to update this results and want to see all of the tasks under User story so the result I want is:
User Story:
Task(dev and QA)
Task (Dev and QA ) but its should know that these tasks are the bug tasks.
View 10 Replies
View Related
Oct 15, 2015
I have parent child dimension,
for customer id-101
---------H1-p Sales Value-50
---c1-c Sales Value-100
---c2-c Sales Value-200
If I will see H1 Value then it show =350
But when my head office is not exists for a customer but Child is exist i want to see data of child Aggregate value.
Example
for Customer ID-102
NO --H1 it is null
----c1 c sales Value -200
---c2 c Sales Value-50
When I want to see value of 102 at H1 leval it show me 250 . even H1 is null.
View 3 Replies
View Related
Oct 22, 2015
I need to write recursive query to find child of a parent until the last leaf. Below is my code.
;WITH Parent AS(
SELECT [ParentID],Value
FROM[DynamicColsValues_TP1]
WHEREValue IS null
UNION ALL
SELECT t1.[ParentID],T1.Value, FROM DynamicColsValues_TP1 t1 INNER JOIN Parent t2
ON t1.[ParentID]=t2.[ParentID]
)
SELECT * FROM Parent option (maxrecursion 0)
When I execute this code. It is returning me millions of rows. Whereas i have only 20 rows in a table max 40 rows it should return.
View 7 Replies
View Related
Mar 3, 2015
I have a scenario,
We have equipment table which stores Equipment_ID,Code,Parent_Id etc..for each Equipment_ID there is a Parent_Id. The PK is Equipment_ID Now i want to select the Code for the Parent_Id which also sits in the same table. All the Parent_Id's also are Equipment_ID's.
Equipment table looks like :
Equipment_ID Code DescriptionTreeLevelParent_Id
6132 S2611aaa 4 6130
11165 V2546bbb 3 1022
15211 PF_EUccc 5 15192
39539 VP266ddd 4 35200
5696 KA273eee 3 3215
39307 VM2611fff 4 35163
39398 IK264ggg 4 35177
There is another table for Equipment_Tree which has got Equipment_Tree_ID,Parent_Id and Equipment_ID does not has the Code here.
Select query where i need to select the Code for all Parent_Id's.
View 8 Replies
View Related
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
View 1 Replies
View Related
Jul 18, 2015
I am working on a query to generate parent child hierarchy from a table.
Table has below records.
--===== If the test table already exists, drop it
IF OBJECT_ID('TempDB..#mytable','U') IS NOT NULL
DROP TABLE #mytable
--===== Create the test table with
CREATE TABLE #mytable
[Code] ...
how to achieve this.l tried with temp tables it doesn't work.
View 5 Replies
View Related
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 ...
View 3 Replies
View Related
Jan 28, 2012
I need to add a child table that will tell us who the participants counselor is, what I did was I did a Make Table query based off the primary key of the Parent table and made that the link (foreign key) for the People_tbl and the Counselor_tbl, so if the counselor changes then the user adds the record to the counselor tbl and then puts in the Effective date. The problem is that when I run a report it doesn't show the present counselor always shows the old counselor?
Code:
SELECT Student_ind.StudentFirstName, Student_ind.StudentLastName, Student_ind.[Student ID], People_tbl.[Family ID], People_tbl.FirstName,
People_tbl.LastName, People_tbl.[Parent ID]
FROM People_tbl RIGHT OUTER JOIN
Student_ind ON People_tbl.[Family ID] = Student_ind.[Family ID]
WHERE (People_tbl.LastName = @Enter_LastName) AND (People_tbl.FirstName = @Enter_FirstName)
View 5 Replies
View Related
Nov 1, 2007
I have table "Clients" who have associated records in table "Mailings"
I want to populate a gridview using a single query that grabs all the info I need so that I may utilize the gridview's built in sorting.
I'm trying to return records containing the next upcoming mailing for each client.
The closest I can get is below:
I'm using GROUP BY because it allows me to return a single record for each client and the MIN part allows me to return the associated record in the mailings table for each client that contains the next upcoming 'send_date'
SELECT MIN(dbo.tbl_clients.client_last_name) AS exp_last_name, MIN(dbo.tbl_mailings.send_date) AS exp_send_date, MIN(dbo.tbl_mailings.user_id) AS exp_user_id, dbo.tbl_clients.client_id, MIN(dbo.tbl_mailings.mailing_id) AS exp_mailing_idFROM dbo.tbl_clients INNER JOIN
dbo.tbl_mailings ON dbo.tbl_clients.client_id = dbo.tbl_mailings.client_idWHERE (dbo.tbl_mailings.user_id = 1000)GROUP BY dbo.tbl_clients.client_id
The user_id set at 1000 part is what makes it rightly pull in all clients for a particular user. Problem is, by using the GROUP BY statement I'm just getting the lowest 'mailing_id' number and NOT the actual entry associated with mailing item I want to return. Same goes for the last_name field. Perhaps I need to have a subquery within my WHERE clause?Or am I barking up the wrong tree entirely..
View 7 Replies
View Related
May 19, 2004
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-)
View 2 Replies
View Related
Feb 25, 2008
hi,
i have two tables i want the identity value of the parent table to be inserted into the chile table
here is my code,but i don't know why it isn't working !
protected void Button1_Click(object sender, EventArgs e) { string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; string pcontent = TextBox1.Text; string data = TextBox2.Text; addtopic(pcontent,connectionString); addfile(data, connectionString); } public void addtopic(string subject,string connstring) { using (SqlConnection connection = new SqlConnection(connstring)) { SqlCommand command = new SqlCommand("INSERT INTO parent" + "(content)" + "Values(@content)", connection); command.Parameters.Add("@content", SqlDbType.Text).Value = subject; connection.Open(); command.ExecuteNonQuery(); } } public void addchild(string name, string connstring) { using (SqlConnection connection = new SqlConnection(connstring)) {Guid id = Guid.NewGuid(); SqlCommand commandd = new SqlCommand("INSERT INTO child" + "(parentid,data,uniqueid)" + "Values(@@IDENTITY,@data,@uid)", connection); commandd.Parameters.Add("@data", SqlDbType.NVarChar, 50).Value = name; commandd.Parameters.Add("@uid", SqlDbType.UniqueIdentifier).Value = id;
thanks in advance :)
connection.Open(); commandd.ExecuteNonQuery(); }
}
View 2 Replies
View Related
Jul 16, 2005
I have a parent/child relationship in a relational database broken out like this:
Table Name: categories[category_id] int (primary_key NOT NULL),[category_name] varchar(50),[parent_fk] int
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:
select category_id, category, parent_fk from categories where category_id not in ( select parent_fk from categories)
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!
View 3 Replies
View Related
Sep 27, 2013
Here is the table - Company with fields:
CompanyID, ParentCompanyID (both integers)
Given a CompanyID - I want to get all the children for the Company.
I did similar procedures but somehow, could not get this to work.
View 4 Replies
View Related
Jul 1, 2007
I want to find all the child of a node in a tree . A child can have multiple parent i.e 2 can be place under multiple parent . The folling is the data:
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
(2) can be neglected
input 7
2
5
1
(2) can be neglected
input 8
7
2
5
(2) can be neglected
Plz help we to write the sql statements
Thanks
View 2 Replies
View Related
Aug 2, 2007
I am designing a table to represent data in hierarchy structure, I use id and parent id to represent the data in hierarchy form:
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
View 3 Replies
View Related
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?
View 1 Replies
View Related
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.
View 3 Replies
View Related
May 9, 2006
I am having problems creating a trigger in SQL Server? I have 2 tables (parent and child) with one to many relationship. When I save a record, one row gets inserted in the parent and one to many gets inserted in the child. The trigger is on the parent table and it is trying to select the number of new records just inserted in the child table that meets a certain criteria. Since the transaction hasn't been committed I can not select the number of records from the child. Does anyone know how to handle this? My manager insists this be done in a trigger.
Thanks, James
View 1 Replies
View Related
Dec 24, 2004
Any one have any ideas or links to point me to ???
View 2 Replies
View Related
Jul 26, 2007
I would like to create a View (we'll call it FamilyView) using two tables, that I can then query against.
For example:
Parent
{
ID_PK,
Name,
PhoneNum,
Address
}
Child
{
ID_PK,
ParentID_FK,
Name
}
The view would return a dataset like this:
Parent.Name, Parent.PhoneNum, Parent.Address, Child.Name1, Child.Name2, Child.Name3... Child.NameN
William Smith, (555)555-5555, 123 Main Street, Susie, Peter, Bill Jr, Fred
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
with an unknown number of children for each parent.
Then I would like to be able to query against this view with something like this:
SELECT * FROM FamilyView Where Child2 = 'Peter'
I have no idea how to write the SQL for this View. Is it possible?
Is this possible without using a cursor?
Thanks for any advice you all can give me.
Brian
View 12 Replies
View Related
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.
View 9 Replies
View Related
Apr 4, 2008
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.
View 5 Replies
View Related
Oct 12, 2013
I am importing data from a paradox table and trying to clean it up. I have this query that finds all the child records that are not in the parent table.
Select MemberID
FROM memtype AS a
WHERE NOT EXISTS
(SELECT *
FROM members AS b
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
WHERE NOT EXISTS
(SELECT *
FROM members AS b
WHERE a.MemberID IN (b.MemberID));
Sql clearly doesn't like this
View 1 Replies
View Related
Dec 11, 2013
I have a parts table which has partid (GUID) column and parentpartId (GUID) column. Need to copy the records to the same table with new GUIDs for partids. How to do that? cursor or temp tables?
View 5 Replies
View Related
Feb 24, 2014
I have an application that has an existing query which returns org units (parent and child) from organization table with orderby on createddate + orgid combination.
Also I added another log table Organization_log with exact columns as Organization table and additional 'IS_DELETED' bool column.
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
View 5 Replies
View Related
Aug 14, 2007
Hello,
I am wondering if there is a way to insert one parent record with multi child records in one transaction? I am using dataset to update my database. I want to use transaction so if one record insert fails all the transctions rollback.
Thanks
Your Input would be greatly appricated.
View 3 Replies
View Related
Nov 2, 2007
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?
View 4 Replies
View Related
