In 3rd table, you can see that I am using boolean column which tells whether this Order belongs to guest user or member user. I want to select corresponding data using ONE QUERY. Here is what I have tried so far but it is far from working
SELECT O.*, CASE WHEN O.IsUserMember = 1 THEN U.UserName ELSE M.MemberName END
FROM Orders O, CASE WHEN O.IsUserMember = 1 THEN Users U ELSE Members M END
WHERE CASE WHEN O.IsUserMember = 1 THEN O.UserId = U.UserId ELSE B.UserId = M.MemberId END;
It is giving me this following error: Syntax error near 'CASE WHEN B.IsThisUserMember = 1 THEN Users U ELSE Members M END WHERE CASE WHEN' at line 1
NOTE: If I remove first CASE condition, then I get empty set. Thanks for whatever you share.
CASEWHEN O.IsUserMember = 1THEN U.UserName
LEFTJOIN Users U
ON U.UserId = O.UserId And O.IsUserMember = 0LEFTJOIN Members M
ON M.MemberId = O.UserId And O.IsUserMember = 1
"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer
I have got a side-question: shouldn't IsUserMember be a column in the Users table rather than in the Orders one? Is it possible that a specific user is considered as a member for an order, and not a member for another one?
Users represent guest users. Members represent registered users.
But, at the end, they are all users, whether they are registered or not. You do not have any "Members" table.
Is it possible that a specific user (so, only one user id), can order as registered user once, and then as unregistered user later (or the contrary)?
Again, I do not know the details of your requirements; I may be wrong, as I may miss something important.
I am thinking of building a custom SSIS Flat File Source component which extends the default Flat File Source component which ships with SSIS. Is there anyway so that I can reuse the code of the Flat File Source component which SSIS provides and then override the methods using my custom logic? Or is there no other option but to start from scratch?
Specifically, what I'm looking for is- being able to override the methods of the Flat File Source pipelinecomponent
being able to inherit the UI of the component so that I can extend it.
Hi CodeProject members,
After being a passive reader of CodeProject articles for so long a time, it feels great to be actively contributing something to this thriving and extremely helpful community.
Recently, I decided to undertake the task of explaining some relatively complex concepts of T-SQL, SQL Server and MSBI, in an effort to give back something to the community I have been learning from for so long.
My goal is to simplify the explanation and elucidation of the concepts as much as possible, at the expense of being annoyingly verbose if need be.
To this effect, I started with explanation of a recursive Common Table Expression in t-SQL. My article can be found at [Recursive CTE]
Now this is my first attempt at explaining something in writing. I need feedback-, how have I fared overall, suggestions for improvement, possible topics for later etc.
Thus, I am sincerely hoping, active community members would help me out in this regard. I have tried explaining the recursive CTE concept to the best of my ability here. But of course, often one's best is still lacking in some respects. Please come forth with your comments and feedback.
Could I have used a better example to explain the concept?
Could I have used better formatting for the code snippets? Or the result-sets?
How could I have ensured that this article is as helpful as possible to a person who is finding it difficult to grasp the recursive CTE concept?
Looking forward to hearing from you.
Sigh! I thought I have already been through all this with one person.
Look. I wanted to post my message only once. At one place. But when I get confronted with a message like 'Message Removed', what is a newbie like me supposed to think? That maybe this isn't the right place to post a message like this. This happened to me when I went to post the message elsewhere too. Therefore the repetition.
I am a newbie when it comes to posting an article here.
I am a newbie when it comes to posting a message here.
I am a newbie when it comes to confronting a message like 'Message Removed' once I make an edit to a message here.
I might have joined CodeProject 7 years back. But I was not an active community member here.
This is my table structure and I select "for index types that do not support online index rebuild rebuild indexes offline" option in rebuild maintenance plan(use SQL maintenance plan-SQL Server 2012) but still getting error
failed with the following error: "An online operation cannot be performed for index 'PK_Table1_1' because the index contains column 'FileContent'"; of data type text, ntext
Clustered indexes must be created, rebuilt, or dropped offline when the underlying table contains large object (LOB) data types: image, ntext, text, varchar(max), nvarchar(max), varbinary(max), and xml.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
Yes i know that ,The table has varbinary(max) column can not online rebuild ,But i check this option : 'for index types that do not support online index rebuild, rebuild indexes offline' in SQL maintenance plan (SQL Server 2012). So this plan does rebuild it offline but still does online why?
I am executing an SSIS package using my C# code, its saying package executing successfully but unfortunately when I checking in the database, it is not putting the values into that Server, in between the execution
I am getting a Warning that "Configuration from a parent variable "ServerName" did not occur because there was no parent variable collection.", if really package is having issues in connections and variables, how can I set the variable values differently than below, below is the code how I am setting the Package connections and Variables.
It seems that package is using some configurations, is there any way I can modify the existing package configurations at run time using C# code? I don't want to add new configurations to package but want to edit the existing ones to match my needs.
Here is the code, any help would be very very helpful for me thanks in advance my friends.