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SQL PUZZLE | The Parent and Child Puzzle – IV ? | SQL Interview Question
In the puzzle you have to show child data in from of the parent Id. For more details please refer sample input and expected output.
|1||I am here|
|2||Yes I am here|
|3||Are you sure|
|1||I am here||2||Yes I am here|
|3||Are you sure||4||Ok|
Script – DDL and INSERT sample data
-- CREATE TABLE MainTable ( Id INT , Vals VARCHAR(100) ) GO INSERT INTO MainTable VALUES (1,'I am here'), (2,'Yes I am here'), (3,'Are you sure'), (4,'Ok') GO CREATE TABLE DependentTable ( Id INT ,ChildId INT ) GO INSERT INTO DependentTable VALUES (1,2), (3,4) GO SELECT * FROM MainTable GO SELECT * FROM DependentTable GO --
SOLUTION | Using JOINS
-- SELECT T1.Id ParentId, T1.Vals ParentDesc, T3.Id ChilId,T3.Vals ChildDesc FROM MainTable T1 INNER JOIN DependentTable T2 ON T1.Id= T2.Id INNER JOIN MainTable T3 ON T3.Id= T2.ChildId --
-- ParentId ParentDesc ChilId ChildDesc ----------- -------------------- ----------- ------------------------- 1 I am here 2 Yes I am here 3 Are you sure 4 Ok (2 rows affected) --
Please add comment(s) if you have one or multiple solutions in mind. Thank You.
Pawan is a SQL Server Developer. If you need any help in writing code/puzzle or training please email at – pawankkmr”AT”gmail.com. Meanwhile please go throgh the top pages from his blog.
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Morgan lee said:
Hi Pawan Khowal,
Great info! I recently came across your and have been reading along.
I thought I would leave my first comment. I don’t know what to say except that I have
When using SSDT for VS2015 (17.2), I’m unable to preview any OLE DB data sources that use the Oracle OLE DB provider installed as part of the Oracle client.
I’ve tested this on a few different machines, on both Windows Server 2012 R2, as well as Windows 10 x64 1703.
To recreate it, install SSDT for VS2015 (17.2) on a system, as well as the Oracle client 32-bit. Create a new SSIS package, and add a new OLE DB connection, using the Oracle Provider for OLE DB. Then create a new data flow task in a package, and add an OLE DB source. Use the Oracle connection, enter a SQL query, and then try to preview the results. The following error occurs:
The system cannot find message text for message number 0x80040e51 in the message file for OraOLEDB. (OraOLEDB)
Even though the error occurs, you can still get the column meta data and connect the OLE DB source to other components. As well, the package will run successfully both from the SSIS designer/debugger, as well as when deployed to an SSIS server.
On one of my systems that was showing the issue, I also installed the original VS2010 BIDS, as well SSDT-BI for VS2012. In both 2010 and 2012, the designer was able to successfully preview the results from my OLE DB source.
Great effort, I wish I saw it earlier. Would have saved my day 🙂