Is This SQL Test Too Hard?
May 17, 2007
I have gotten some criticism from coworkers regarding this test and just wanted to see what you guys think. I realize the wording could use improvement and any criticism towards making it easier to understand is much appreciated.
FWIW - I had to solve this problem on the job so I feel it is a real-world test that helps me understand how people think and if they try to find alternate solutions.
Thanks!
~~~~~~~~~~~~~~~~~~~~
Given a table that has over 100,000 records…
SUBSIDIARY
=========
PARENT_IDINT
CHILD_IDINT
ULTIMATE_PARENT_IDINT
CLEANUP_INDBIT
…where each PARENT_ID can have multiple CHILD_ID values, but the PARENT_ID should not equal the CHILD_ID. After an initial data load, the ULTIMATE_PARENT_ID and CLEANUP_IND columns contain NULL values (see page 2 for sample data).
ULTIMATE_PARENT_ID is defined as the topmost parent in the chain for the particular CHILD_ID record, so if the chain was only 2-level’s deep the ULTIMATE_PARENT_ID is the CHILD_ID’s PARENT_ID’s PARENT_ID.
Please write an answer for all three questions below:
A)Which of the following queries should you run first?
B)Write an optimized query to identify the ULTIMATE_PARENT_ID for each CHILD_ID and set its value into the ULTIMATE_PARENT_ID column.
C)Write a query to identify ALL of the circular references and mark each record that is a circular reference by updating the CLEANUP_IND column to 1.
~~~~~~~~~ Page 2 ~~~~~~~~~
Sample Data, remember though this table has over 100,000 records and the parent-child chain can go n-levels deep – where n is not known.
PARENT_IDCHILD_IDULTIMATE_PARENT_IDCLEANUP_IND
1024512NULLNULL
362300NULLNULL
887541NULLNULL
10221024NULLNULL
546887NULLNULL
5122305NULLNULL
112967NULLNULL
697123NULLNULL
901452NULLNULL
2300666NULLNULL
334445NULLNULL
512903NULLNULL
884554NULLNULL
313313NULLNULL
554884NULLNULL
112119NULLNULL
967555NULLNULL
2305333NULLNULL
33336NULLNULL
541546NULLNULL
10301020NULLNULL
112999NULLNULL
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Oct 12, 2015
We are setting up a test lab environment with 100 machines. Â We want one master testing db that gets replicated to each to run scripted application tests nightly. Â
My goal is to minimize the amount of work to move this thing to each of the 100 test machines. Â I am wondering if we need to even have the sql local and invest in a monster db server with 100 copies of the db we restore and each test machine point to their own db on that server, or if I should use db mirroring or something to get the master test db to each of those machines instead.
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Oct 17, 2006
Now that we have a good programming model in SSIS - the question is whether to write automated unit tests for your packages, and would it generally be a good idea for packages?
Also - if yes to write tests - then where to find more informations regarding How to accomplish that?
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Nov 27, 2007
hi every one,
i need to test SSIS pacakge which will import data from different database where record count is around 5 millions.
iam planning to test it through c# code as well as manually also.
SSIS source : consist of 7 tables
SSIS destination :consist of 7 tables
Using c# code iam trying to run ssis package through batch file.
i am putting expected rowcount, column count in an excel file and comparing same with destination tables by writing query implementing ADO.Net concept.
am i going right way ,can any one suggest best and productive way to test the ssis package .
what are the other things i need to test it.
do any one can add test cases to it.
S.No
Test Case
1
Verify all the tables have been imported.
2
Verify all the rows in each table have been imported.
3
Verify all the columns specified in source query for each table have been imported
4
Verify all the data has been received without any truncation for each column.
5
Verify the schema at source and destination
6
Verify the time taken /speed for data transfer
7
Fields truncated due to difference in length of the field at destination.
Regards
Arif shareef
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Jun 25, 2015
I need to restore test DB from production backup but once it is restored I would need all the permissions of sql logins and windows AD account intact in test Db as it was before.
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Apr 5, 2005
Hi,
I need to use a top and a join in the same sql. To get 10 top refnr from orders_refnr. That works fine to I use this:
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But I need to be able to get information from more fields than the field refnr. How can I specify more fields? I need to get other fields from produkter.
Please helt I´m really stucked.
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Feb 13, 2006
hello
i have a proplem in query
i have 2 tables in my sql db one named stuednt include fields(id,name)
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ok
i want to query the student that have courses EX. mcse
the result that i want from 2 tables
ID | NAME | Coures_NAME
in MSHFLEXGRID1
any one help me plz ...
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Nov 14, 2000
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Sep 27, 1999
After experiencing a hard drive failure i have reinstaled MSSQL7 on one drive and have a database which I need to recover on separate physical drive. How can I go about doing this?
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Jul 17, 2003
Hi,
I have ran
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drive MB free
----- -----------
C 1708
D 16311
2. I ran Backup Wizard in EM and able to see only above drives
3. But if ran backup in EM able to see more than 10 Drives(like C,D,H,I,J,M,N and etc).
Why I can able to see those difference?.
How do I find out exactly how many drives are there in this server without directly going to that server?.
I appreciated your valuable answere.
Thanks,
Ravi
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Jul 30, 2001
Hi, I'm looking for a way to check the free space left on the hard drives and then if needed send an alert to notify when we need to free up some space. I played around with the performance monitor and realized I could do it that way but I think you would have to leave the performance monitor running all the time and I'm not sure if I want to do that. I also read about the xp_fixeddrives proc that displays how much free space is available but then I don't know what to do from there? Does anyone have any recommendations for the best way to do this.
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Feb 19, 2007
Right, I have this database that I need to sort, I'll give you an example:
ID Name Value
2312 Sega 200
5678 Blizzard 215
3412 Bullfrog 210
6798 Nintendo 195
Now, what I need to do is to sort it, perform calculations on and I need the list to be sorted with a predefined post as the top result, say like this one time:
ID Name Value
3412 Bullfrog 200
2312 Sega 210
5678 Alizzard 215
6798 Nintendo 195
as you can see sorting it alphabetically would lead to
5678 Alizzard 215
3412 Bullfrog 210
6798 Nintendo 195
2312 Sega 200
(or the other way around if you play with asc/desc)
by id would be
2312 Sega 200
3412 Bullfrog 210
5678 Alizzard 215
6798 Nintendo 195
There aren't any top or bottom values sort of speak for the posts I want to be on top, so...how to sort this like this?
3412 Bullfrog 200
2312 Sega 210
5678 Alizzard 215
6798 Nintendo 195
the order after the top one is irrelevant.
Now...I know I could sort this by doing something like
"Select * FROM blablabla WHERE Name = 'Bullfrog'"
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Its a brain teaser allright...can you help me out?
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Hello, everyone:
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Hello!
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OB
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Sep 2, 2007
Hi there,
I am using this stored procedure in sql.
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CREATE PROCEDURE sp_InsertEmployee
@Firstname nvarchar(50),
@Lastname nvarchar(50),
@Role nvarchar(50),
@Manager nvarchar(50),
@Division nvarchar(50)
AS
BEGIN
SET NOCOUNT ON;
INSERT INTO EMPLOYEES (FIRSTNAME, LASTNAME) VALUES (@FIRSTNAME, @LASTNAME)
INSERT INTO [ROLE] ([ROLE]) VALUES (@ROLE)
INSERT INTO MANAGER (MANAGER) VALUES (@MANAGER)
INSERT INTO DIVISION(DIVISION) VALUES (@DIVISION)
END
GO
My C# code is like this:
SqlCommand sqlC = new SqlCommand("sp_InsertEmployee", myConnection);
sqlC.CommandType = CommandType.StoredProcedure;
sqlC.Parameters.Add(new SqlParameter("@Firstname", SqlDbType.VarChar, 50, "Firstname"));
sqlC.Parameters.Add(new SqlParameter("@Lastname", SqlDbType.VarChar, 50, "Lastname"));
sqlC.Parameters.Add(new SqlParameter("@RoleID", SqlDbType.Int, 50, "RoleID"));
sqlC.Parameters.Add(new SqlParameter("@ManagerID", SqlDbType.Int, 50, "ManagerID"));
sqlC.Parameters.Add(new SqlParameter("@DivisionID", SqlDbType.Int, 50, "DivisionID"));
//sqlC.Parameters[0].Value = 4;
sqlC.Parameters[0].Value = FirstnameText.Text;
sqlC.Parameters[1].Value = Lastnametext.Text;
sqlC.Parameters[2].Value = RolecomboBoxTest.Text;
sqlC.Parameters[3].Value = ManagercomboBox1.Text;
sqlC.Parameters[4].Value = DivisioncomboBox2.Text;
int i = sqlC.ExecuteNonQuery();
//sqlC.ExecuteNonQuery();
Sorry for pasting so much.
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Oct 18, 2006
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More info:
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Feb 12, 2008
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3 UserIDParameters.Name = "ProdUserID"
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Feb 24, 2004
Hi there,
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Thus, I was wondering if it is acceptable to hard code the country pk of the UK and Ireland into the formular which works out the postage and packing?
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Mar 30, 2006
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An
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Dec 12, 2001
I thought a stored procedure was taking much too long to complete. So, I moved the main query to Query Analyzer and found that when I substituted actual values for variables that my SELECT statement ran in seconds. Just to test, I created DECLARE statements, set the variables equal to the same values, re-ran the SELECT statement and it took over a minute. Even the Execution Plan was much different. Any suggestions?
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Mar 27, 2001
Hello I was hoping somebody out there could help me …..
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Feb 2, 2007
Hi guys,
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Jul 25, 2001
Hello,
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Nov 5, 2001
Hi,
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I will pay for this info.
4046323231 cell
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