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• ignore some values in insert into select from sql stament

  - by nitroxn

  Suppose that I have a Table Symbols(Symbol, Value) and a Table SymbolValues (Symbol, Value) which contains a list of values for the symbol. How to choose maximum values fromt he SymbolValues table and insert into Symbols table. For Example, The SymbolValues Table has following values A 1 A 2 A 3 B 6 B 7 Then only A 3 and B 7 should be inserted in the Symbols table. Is this possible using insert into select statement. Thanks

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• Force update in Hibernate

  - by gubrutz

  How can I force Hibernate to update an entity instance even if the entity is not dirty? I'm using Hibernate 3.3.2 GA, Hibernate Annotations and Hibernate EntityManager btw. I really want Hibernate to execute the generic UPDATE statement even if no property on the entity has changed. I need this because some event listeners need to get invoked to do some additional work when the application runs for the first time. Thanks!

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• Can i use a generic implicit or explicit operator? C#

  - by acidzombie24

  How do i change the following statement so it accepts any type instead of long? Now here is the catch, if there is no constructor i dont want it compiling. So if theres a constructor for string, long and double but no bool how do i have this one line work for all of these support types? ATM i just copied pasted it but i wouldnt like doing that if i had 20types (as trivial as the task may be) public static explicit operator MyClass(long v) { return new MyClass(v); }

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• Manually output HAML start and end tags

  - by trobrock

  I have some code: - count = 0 - @clients.each do |client| %div{:class => "grid_2#{(" alpha" if (count % 3) == 0) || (" omega push_2" if (count % 3) == 2) || " push_1"}"}= link_to h(client.name), client - count += 1 I want to output an opening div tag right after the each statement if the (count % 3) == 0 and out put the end tag at the end of the block if the (count % 3) == 2 but I can't figure out how to get HAML to do this. Any ideas?

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• Java Synchronized function

  - by leon

  Hi I have a question. In the following code, if a thread were blocked at wait statement, and another thread attempts to execute foo(), would the hello wolrd message be printed? and Why? Many Thanks synchronized foo(){ system.out.println("hello world"); ..... wait(); ..... }

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• Windows server issue with a product

  - by peter

  Can you tell me the meaning of this statement.I am using windows 2008 server OS Log Problem must be changed so that it elevates privileges for a user executing the Problem. its done by creating a manifest that indicates that Problem needs Administrator privileges.

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• Sqlite3 and PDO problem with ORDER BY

  - by Maenny

  Hi, I try to use the SQL statement SELECT * FROM table ORDER BY column via an PDO-Object in PHP. Problem is, that I always get an error (Call to a member function fetchall() on a non-object - that means, the query did not return a PDO-object) when using the names of all columnname EXCEPT for ID. When I query SELECT * FROM table ORDER BY ID it works. ID is the PRIMARY INTEGER KEY, all other columns are TEXT or NUMERIC, neither of them would works with the ORDER BY clause. Any ideas?

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• How can I return something early from a block?

  - by ryeguy

  If I wanted to do something like this: collection.each do |i| return nil if i == 3 ..many lines of code here.. end How would I get that effect? I know I could just wrap everything inside the block in a big if statement, but I'd like to avoid the nesting if possible.

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• What does [a|b|c] evaluate to in Prolog?

  - by Ambrose

  The pipe operator in prolog returns one or more atomic Heads and a Tail list. ?- [a,b,c] = [a,b|[c]]. true. Nesting multiple pipes in a single match can be done similar to this: ?- [a,b,c] = [a|[b|[c]]]. true. What does the statement [a|b|c] infer about a, b and c?

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• Switching MySql Replication Format

  - by NNN

  I'm currently using statement-based replication. After upgrading to MySql 5.1, I'm considering using row-based replication. After reading the docs it seems that you can change the format of the master on the fly. Will the slave automatically adapt to whatever type of binary log it is sent? Do I have to make any changes to the slave or master to get ready for switching or can I simply modify the binlog_format variable on the master?

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• SQL: HAVING clause

  - by Craig Johnston

  See the following SQL statement: SELECT datediff("d", MAX(invoice.date), Now) As Date_Diff, MAX(invoice.date) AS max_invoice_date, customer.number AS customer_number FROM invoice INNER JOIN customer ON invoice.customer_number = customer.number GROUP BY customer.number If the the following was added: HAVING datediff("d", MAX(invoice.date), Now) > 365 would this simply exclude rows with Date_Diff <= 365? What should be the effect of the HAVING clause here?

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• SQL Select for multiple where clause

  - by Tony

  Hi, I am trying to create SQL Select that returns counts of a certain field based on a field. So, here is what I am trying to do. Select count(distinct id) as TotalCount, -- this will be the total of id count(distinct id where type='A') as TotalA, -- this will be total when type='A' count(distinct id where type='B') as TotalB -- This will be total when type = 'B' from MyTable Basically, TotalCount = TotalA + TotalB. How can I achieve this in SQL Select Statement? Thanks.

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• Left outer join in LINQ is showing exception

  - by stackuser3

  The folloqing is the excpetion I am getting The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type. below is my LINQ Statement where QuestionId is the primary key in my table var questionViewsData = from questionViews in objDc.SC_QuestionsViews join questions in objDc.SC_Questions on questionViews.QuestionId equals questions.QuestionId into qs from questions in qs.DefaultIfEmpty() where questionViews.CreatedDate.Date == new DateTime(2010, 4,27) select new { Selected =(questions == null ?-1:questions.QuestionId), QuestioinTitle = questions.Title, VotesCount = questions.VotesCount }; Let me know how to resolve this

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• ms-access: displaying column as "something else"

  - by every_answer_gets_a_point

  i have the following access sql statement: SELECT * FROM (SELECT [Occurrence Number], [Occurrence Date], [1 0 Preanalytical (Before Testing)], [Cup Type], NULL as '2 0 Analytical (Testing Phase)', [2 0 Area], NULL,NULL FROM [Lab Occurrence Form] WHERE NOT ([1 0 Preanalytical (Before Testing)] IS NULL) in this: NULL as '2 0 Analytical (Testing Phase)' when it displays the column it shows the single quote. if i remove the quote completely it gives me an error, if i use double quotes it shows me the double quotes in the resulting table is it possible to not have it show any quotes?

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• Comma separated variable in MySQL

  - by ryan

  I want to create a stored procedure in MySQL and one of the input parameters will need to be a comma separated list of integers. How do I loop through each integer and run an update statement on it? I've googled it but can't seem to find anything that will work for MySQL.

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• Questions about grails filters

  - by manojsingh

  Basically I have 2 questions regarding grails filters. According to grails documentation you can do something like below in a filter if (userId != paramsUserId) { flash.message = "You can only modify yourself" redirect(action: 'list') return false } If the above condition is true then how will the return statement get executed ? Can I have a redirect in my filter to a some action which also has a redirect ?

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• Eclipse Doesn't List Classes Within Java Packages

  - by Matt Robertson

  Usually when I'm typing a Java import statement in Eclipse or otherwise referencing a class via the packages that it is in, Eclipse shows a context menu with a list of all classes within that package. There have been several times, however, that it would only shows subpackages within a package and would not show classes within that package. Does anyone know why this is? It sounds like a setting/preference was changed, but I never knowingly changed anything related to this.

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• MySQL triggers and selecting data inside the trigger?

  - by Stuart

  Does anyone know if you can run a select statement to return values on the table that the trigger is assigned to from inside the trigger? Thanks in advance.

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• Radio buttons not checked in jQuery

  - by kd7iwp

  I have this line of code for page load: if ($("input").is(':checked')) { and it works fine when the radio button input is checked. However, I want the opposite. Something along the lines of if ($("input").not(.is(':checked'))) { so that my if statement runs when none of the radiobuttons are selected. What is the best way to go about this?

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• SQL swap field values

  - by Silence

  I have a SQL table (MYSQL 4.0 to be precise) composed of the following : int no (primary) int field1 int field2 I would like to swap the values of field1 with the values of field2 and vice-versa. Ex.: 1;2.5;3.76 becomes 1;3.76;2.5 I need a swapping temporary variable of some sort. But I don't think I can use something like Set @var1 = field1 inside my update statement. And I don't think altering the table to add a temporary column is my best best either.

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• Change content based on season with ColdFusion

  - by geckomist

  For ColdFusion I would like to use a cfswitch statement to have different code for each season of the year. For example to display <p>Winter</p> for winter and <p>Summer</p> for summer, etc. What is the best approach to achieve this?

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• range of parameter and values in php

  - by Ajay

  What is exact meaning of this statement... VERIFY THE PARAMETER VALUE ARE IN THEIR EXPECTED RANGE AND TYPE. I am passing values in POST method through URL in php.

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• Selecting rows distinctively

  - by noway

  Lets assume my database table structure is something like | items | weight | |============|==========| | item_1 | 50 | | item_2 | 90 | | item_2 | 45 | | item_2 | 60 | | item_3 | 40 | In the select statement, I want to show an item only for once with the highest weight also ordered by height. So the result should be : | items | weight | |============|==========| | item_2 | 90 | | item_1 | 50 | | item_3 | 40 | I tried something like SELECT DISTINCT items, weight FROM mytable ORDER BY weight DESC but it didn't work because the results are actually distinct. How can I make that selection?

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• Why does typeof null misbehave in switch statements?

  - by user353366

  It is commonly known that typeof null returns "object". However, I have a piece of code that looks like this: switch(typeof null){ case "object": 1; default: 3; } This code returns 3. Why does "object" as returned by typeof null not cause the first branch of the case statement to be executed?

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• How to make this open a webbrowser inside a new form

  - by user335932

  private void button5_Click(object sender, EventArgs e) { if (domainUpDown2.Text == "Battlefield: Bad Company 2") { Form2 form2 = new Form2(); form2.ShowDialog(); } } All that does is open a new blank form, but i need it to open a new form with a webbrowser in it so i can set it url dependent on the if statement..

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