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  • Sql query Error: Operand should contain 1 column(s) in rails

    - by dombesz
    Hi everyone, SELECT * FROM jobs WHERE (SELECT DISTINCT jobs.* FROM jobs, job_requests WHERE (jobs.user_id = 1) OR (job_requests.user_id = 1 AND job_requests.job_id = jobs.id)) This sql gives me Mysql::Error: Operand should contain 1 column(s). If i execute the select from the where clause it works SELECT DISTINCT jobs.* FROM jobs, job_requests WHERE (jobs.user_id = 1) OR (job_requests.user_id = 1 AND job_requests.job_id = jobs.id) Could somebody explain me why? This query is generated by rails activerecord so the main select is needed.

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  • Native SQL - How to set the schema and database names

    - by icelobber
    Im using Native SQL from ABAP language. The query to get data is something like this SELECT COUNT(ROWID) FROM <SCHEMANAME>.<TABLENAME>;@<DATABASENAME> INTO :localvariable I want to somehow set the schemaname and database name as default so that i do not need to use them in the SELECTs later. Then i can only use the table name in the SELECT. thanks !!

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  • Suggestions on documentation of a DB model when using Entity Framework 4

    - by Junior Ewing
    Any experiences on how to document Entity Framework 4 based Database projects? There is the Document and Summary properties on the Entities, but if we want to regenerate the model from the database at some point, it will be lost! Is there some way to map documentation data inside SQL to the Entities in the EDMX file so it is safe. Suggestions of other best practices? Ideally I want to be able to augo generate html/helpfile documentation from the DB when we deploy.

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  • how to convert sql union to linq

    - by lowlyintern
    I have the following Transact SQL query using a union. I need some pointers as to how this would look in LINQ i.e some examples wouldbe nice or if anyone can recommend a good tutorial on UNIONS in linq. select top 10 Barcode, sum(ItemDiscountUnion.AmountTaken) from (SELECT d.Barcode,SUM(AmountTaken) AmountTaken FROM [Aggregation].[dbo].[DiscountPromotion] d GROUP BY d.Barcode UNION ALL SELECT i.Barcode,SUM(AmountTaken) AmountTaken FROM [Aggregation].[dbo].ItemSaleTransaction i group by i.Barcode) ItemDiscountUnion group by Barcode

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  • Use Tablediff to compare all tables

    - by Davie
    Hi, I have recently discovered the tablediff utility of SQL Server 2005. I have 2 instances of the same database each on a different server. Is it possible to compare all tables using tablediff without having to replicate the same command while only changing the table name? For example, compare table1 on server1 with table1 on server2 then compare table2 on server1 with table2 on server2, until all tables have been compared.

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  • Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID

    - by Jian Lin
    Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID); ? The ( ) usually is for specifying grouping of something. But in this case, are we supposed to be able to use 2 or more field names... in the example above, it can be all clear that it is 1 field, is it just that the parser is not made to bypass the ( ) when it is all clear? (such as in the language Ruby).

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  • Refactoring SQL

    - by Mongus Pong
    Are there any formal techniques for refactoring SQL similar to this list here that is for code? I am currently working on a massive query for a particular report and I'm sure there's plenty of scope for refactoring here which I'm just stumbling through myself bit by bit.

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  • SQL Server Query

    - by Scott Jackson
    Hi, I'm trying to do some work with my SQL table. I have 2 buildings with room numbers 1 - 100 in building 1 and 101 - 199 in building 2. I have a location field (which I've just created) and want to run a query to populate it with either 'Building 1' or 'Building 2' depending on which room number it has in the 'Room' field. Many thanks for your help. Regards Scott

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  • SQL Server store procedure line number issue

    - by George2
    Hello everyone, I am using SQL Server 2008 Enterprise. I met with issue which says line 9 of store procedure foo is meeting with dead lock issue. My question is how to find exactly the 9th line of the store procedure? My confusion is because of coding format issue, how to locate 9th line correctly. thanks in advance, George

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  • retrieve image from sql server in picturebox

    - by user3116296
    I have saved a picture in sql server and now i can not to retrieve image and set it's in picturebox with linq. why byte[] x become null? private void dataGridViewUser_CellClick(object sender, DataGridViewCellEventArgs e) { DataGridViewRow row = dataGridViewUser.CurrentRow; byte[] x=(byte[])row.Cells["Image"].Value; MemoryStream ms1 = new MemoryStream(x); picuser.Image = Bitmap.FromStream(ms1); }

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  • ASP.NET LINQ to SQL SubmitChanges() doesn't update the database

    - by Alex
    In my 2nd ASP.NET MVC project I'm facing a very weird problem: when I call the SubmitChanges method of the DataContext class, nothing updates in the database. It's weird because everything works fine with my first project. I'm using a remote database created in Sql Server Management Studio, I tried doing some queries there and in Visual Studio 2010 (where I have the connection to the database), they all work. Where might the problem be hidden?

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  • sql inner join problem

    - by Luke
    The following SQL query isn't working. I think the error is on the first line. SELECT SUBSTRING(tbl_news.comment, 1, 250) as tbl_news.comment, tbl_news.id, tbl_news.date, tbl_news.subject, tbl_users.username FROM tbl_news INNER JOIN tbl_users ON tbl_news.creator = tbl_users.id ORDER BY date DESC

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  • SQL Query to get Count within a Stored Proc

    - by sia
    So i need to figure out how i can get a record count value and use that count as a new value to insert into a table. Ex: In My Stored Procedure @Count int What im looking for @Count to equal "select top (1) _fieldName from _someTable order by _fieldName Desc" Finally insert into _newTable (_fieldName) values (@Count) End I dont have to use a variable, just trying to demonstrate what im really trying to do. My SQL knowledge is pretty limited so no laughing, or smirking! ;)

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  • Composite keys as Foreign Key?

    - by paulio
    I have the following table... TABLE: Accounts ID (int, PK, Identity) AccountType (int, PK) Username (varchar) Password (varchar) I have created a composite key out of ID and AccountType columns so that people can have the same username/password but different AccountTypes. Does this mean that for each foreign table that I try and link to I'll have to create two columns? I’m using SQL Server 2008

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  • sql to compare two strings in MS access

    - by tksy
    I am trying to compare a series of strings like the following rodeo rodas carrot crate GLX GLX 1.1 GLX glxs the comparision need not be case sensitive i am trying to write a sql where i am updating the first string with the second string if they match approximately. Here except the second string all the other examples match. I would like to write a query which updates the strings except the second one. is this possible directly in a query in ACCESS thanks

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  • How to sanitize sql fragment in Rails

    - by dimus
    I have to sanitize a part of sql query. I can do something like this: class << ActiveRecord::Base public :sanitize_sql end str = ActiveRecord::Base.sanitize_sql(["AND column1 = ?", "two's"], '') But it is not safe because I expose protected method. What is a better way to do it?

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  • Convert sql query

    - by nisha
    I have used this query in sql,pls convert this query to use for access database. Table structure is UserID,Username,LogDate,LogTime WITH [TableWithRowId] as (SELECT ROW_NUMBER() OVER(ORDER BY UserId,LogDate,LogTime) RowId, * FROM @YourTable), [OddRows] as (SELECT * FROM [TableWithRowId] WHERE rowid % 2 = 1), [EvenRows] as (SELECT *, RowId-1 As OddRowId FROM [TableWithRowId] WHERE rowid % 2 = 0) SELECT [OddRows].UserId, [OddRows].UserName, [OddRows].LogDate, [OddRows].LogTime, [EvenRows].LogDate, [EvenRows].LogTime FROM [OddRows] LEFT JOIN [EvenRows] ON [OddRows].RowId = [EvenRows].OddRowId

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