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• Monitoring Log Shipped Databases

  - by Registered User

  I need a consistent way to monitor databases that are read-only log shipped copies of production databases. In the past I have relied on the following methods: Set the job that restores logs to the database kick off another job as its last step. Set the job that restores logs to the database to insert a record in a control table as its last step. Query the msdb database to check the status of the job that restores logs to the database. Query a control table inside the database itself that gets a value immediately before transaction logs are backed up. Query MAX values from tables inside the database to see if it has recent changes. Although the above methods work, they can't be implemented for every log shipped database that I query for various reasons. What is the best method for monitoring the "data as of" date for a log shipped database?

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• Complicated Order By Clause?

  - by Todd

  Hi. I need to do what to me is an advanced sort. I have this two tables: Table: Fruit fruitid | received | basketid 1 20100310 2 2 20091205 3 3 20100220 1 4 20091129 2 Table: Basket id | name 1 Big Discounts 2 Premium Fruit 3 Standard Produce I'm not even sure I can plainly state how I want to sort (which is probably a big part of the reason I can't seem to write code to do it, lol). I do a join query and need to sort so everything is organized by basketid. The basketid that has the oldest fruit.received date comes first, then the other rows with the same basketid by date asc, then the basketid with the next earliest fruit.received date followed by the other rows with the same basketid, and so on. So the output would look like this: Fruitid | Received | Basket 4 20091129 Premuim Fruit 1 20100310 Premuim Fruit 2 20091205 Standard Produce 3 20100220 Big Discounts Any ideas how to accomplish this in a single execution?

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• C# - Password Database

  - by user335932

  So I want to make a program that allows you to store and search for user names/passwords for online sites there signed up to. I know C# has some database options but I don't know much about it. I also heard that it can read/write excel files. Whats do you think is best for storing the data? ALSO do databases need to be stored online on a sever, or can they reside in the program files?

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• Performing Inner Join for Multiple Columns in the Same Table

  - by frankiefrank

  I have a scenario which I'm a bit stuck on. Let's say I have a survey about colors, and I have one table for the color data, and another for people's answers. tbColors color_code , color_name 1 , 'blue' 2 , 'green' 3 , 'yellow' 4 , 'red' tbAnswers answer_id , favorite_color , least_favorite_color , color_im_allergic_to 1 , 1 , 2 3 2 , 3 , 1 4 3 , 1 , 1 2 4 , 2 , 3 4 For display I want to write a SELECT that presents the answers table but using the color_name column from tbColors. I understand the "most stupid" way to do it naming tbColors three times in the FROM section, using a different alias for each column to replace. How would a non-stupid way look?

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• Simple aggregating query very slow in PostgreSql, any way to improve?

  - by Ash

  HI I have a table which holds files and their types such as CREATE TABLE files ( id SERIAL PRIMARY KEY, name VARCHAR(255), filetype VARCHAR(255), ... ); and another table for holding file properties such as CREATE TABLE properties ( id SERIAL PRIMARY KEY, file_id INTEGER CONSTRAINT fk_files REFERENCES files(id), size INTEGER, ... // other property fields ); The file_id field has an index. The file table has around 800k lines, and the properties table around 200k (not all files necessarily have/need a properties). I want to do aggregating queries, for example find the average size and standard deviation for all file types. But it's very slow - around 70 seconds for the latter query. I understand it needs a sequential scan, but still it seems too much. Here's the query SELECT f.filetype, avg(size), stddev(size) FROM files as f, properties as pr WHERE f.id = pr.file_id GROUP BY f.filetype; and the explain HashAggregate (cost=140292.20..140293.94 rows=116 width=13) (actual time=74013.621..74013.954 rows=110 loops=1) -> Hash Join (cost=6780.19..138945.47 rows=179564 width=13) (actual time=1520.104..73156.531 rows=179499 loops=1) Hash Cond: (f.id = pr.file_id) -> Seq Scan on files f (cost=0.00..108365.41 rows=1140941 width=9) (actual time=0.998..62569.628 rows=805270 loops=1) -> Hash (cost=3658.64..3658.64 rows=179564 width=12) (actual time=1131.053..1131.053 rows=179499 loops=1) -> Seq Scan on properties pr (cost=0.00..3658.64 rows=179564 width=12) (actual time=0.753..557.171 rows=179574 loops=1) Total runtime: 74014.520 ms Any ideas why it is so slow/how to make it faster?

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• how to find end of quarter given a date in the quarter

  - by Ramy

  If i'm given a date (say @d = '11-25-2010'), how can I determine the end of the quarter from that date. I'd like to use a timestamp one second before midnight. I can get this: select dateadd(qq, datediff(qq, 0, getdate()), 0) as quarterStart which gives me: '10-1-2010' and I use this for one second before midnight of a given day: select DateAdd(second, -1, DateAdd(day, DateDiff(day, 0, @d))+1, 0) ) AS DayEnd in the end, a quarterEnd method would give me '12-31-2010 23:59:00'

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• how to set error message of the independent form in the status bar of the mdi form in c#?

  - by mouna

  i have one independent form where i am checking read only access of an xml file , if the file is read only then i have to display message in the status bar of MDI form. since i am using independent form to valid xml file, status bar of the MDI form is not displaying the error message. now how to display message? thanx in advance

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• interesting vba/access question: color rectangles according to data

  - by every_answer_gets_a_point

  i have a datasheet that looks like this: ID name_ 1 2 3 4 1 name1 x 0 0 0 2 name2 0 x 0 0 3 name3 0 0 x 0 4 name4 0 0 0 x i have rectangles on a report that correspond to this datasheet. when the report opens, i need the rectangles to be colored RED according to the data. for example where name1 and there is an x in the 1 column, i need the specific rectangle corresponding to this (name1, 1) to be colored red. here is the result that i will need: x x x x (where x is a rectangle that is RED) perhaps the best place to place this code would be in ON LOAD event of the report, but i am not sure exactly. can you please suggest to me some code that would turn the specified rectangles RED according to the data?

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• How to update a record with multiple keys

  - by OceanBlue

  I am trying a database app on Android. I want to use the SQLiteDatabase update(...) convenience method to update a record. Normally, for a WHERE clause of a single key this is working. Following code is working fine:- values.put("testname", "Quiz1"); mDB.update("Tests", values, "id=?", new String[]{"2"}); //this statement works However, I want to update a column in a table which has a combination of two keys as the unique identifier. I tried the following. This executes without exception, but nothing is updated. values.put("score", 60); mDB.update("Results", values, "studentid=? AND testid=?", new String[] { "2,1" }); // this statement does not work How to do it?

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• Error while converting function from oracle to mssql

  - by sss

  Hi, I am migrating a function from oracle to mssql 2008.This function raises Select statements included within a function cannot return data to a client as error.How can i solve this problem? Original PLSQL Code CREATE OR REPLACE function f_birim_cevrim_katsayi (p_ID_MAMUL in number, p_ID_BIRIMDEN in number, p_ID_BIRIME in number) return number is v_katsayi number; begin v_katsayi:=0; if p_ID_BIRIMDEN!=p_ID_BIRIME then for c in ( select * from CR_BIRIM_CEVRIM where ID_MAMUL = p_ID_MAMUL and ( (ID_BIRIM = p_ID_BIRIMDEN and ID_BIRIM2 = p_ID_BIRIME) OR ( ID_BIRIM2 = p_ID_BIRIMDEN and ID_BIRIM = p_ID_BIRIME) ) and VALID = 1) loop if c.ID_BIRIM=p_ID_BIRIMDEN then v_katsayi:=c.MT_ORAN; else v_katsayi:=1/c.MT_ORAN; end if; end loop; else v_katsayi:=1; end if; return round(v_katsayi,10); exception when others then return 0; end; TSQL CODE If Exists ( SELECT name FROM sysobjects WHERE name = 'f_birim_cevrim_katsayi' AND type = 'FN') DROP FUNCTION f_birim_cevrim_katsayi GO CREATE FUNCTION f_birim_cevrim_katsayi ( @p_ID_MAMUL FLOAT , @p_ID_BIRIMDEN FLOAT , @p_ID_BIRIME FLOAT ) RETURNS float AS BEGIN DECLARE @adv_error INT DECLARE @v_katsayi FLOAT SELECT @v_katsayi = 0 IF @p_ID_BIRIMDEN != @p_ID_BIRIME BEGIN DECLARE cursor_for_inline_select1 CURSOR LOCAL FOR SELECT * FROM CR_BIRIM_CEVRIM WHERE ID_MAMUL = @p_ID_MAMUL AND ((ID_BIRIM = @p_ID_BIRIMDEN AND ID_BIRIM2 = @p_ID_BIRIME) OR (ID_BIRIM2 = @p_ID_BIRIMDEN AND ID_BIRIM = @p_ID_BIRIME)) AND VALID = 1 OPEN cursor_for_inline_select1 FETCH NEXT FROM cursor_for_inline_select1 WHILE (@@FETCH_STATUS <> -1) BEGIN IF c.ID_BIRIM = @p_ID_BIRIMDEN BEGIN SELECT @v_katsayi = c.MT_ORAN END ELSE BEGIN SELECT @v_katsayi = 1/c.MT_ORAN END END CLOSE cursor_for_inline_select1 DEALLOCATE cursor_for_inline_select1 END ELSE BEGIN SELECT @v_katsayi = 1 END DEALLOCATE cursor_for_inline_select1 return ROUND(@v_katsayi, 10) GOTO ExitLabel1 Exception1: BEGIN DEALLOCATE cursor_for_inline_select1 return 0 END ExitLabel1: return ROUND(@v_katsayi, 10) END GO

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• ASP.MVC ModelBinding Behaviour

  - by OldBoy

  This one has me stumped, despite the numerous posts on here. The scenario is a basic MVC(2) web application with simple CRUD operations. Whenever the edit form is submitted and the UpdateModel() called, an exception is thrown: System.Data.Linq.ForeignKeyReferenceAlreadyHasValueException was unhandled by user code This occurs against a DropDownList value which is a foreign key on the entity table. However, there is another DropDownList list on the form, representing another foreign key, which does not throw the error (unsurprisingly). Changing the property values manually inside the Edit Action: Recipe recipe = repository.GetRecipe(int.Parse(formValues["recipeid"])); recipe.CategoryId = Convert.ToInt32(formValues["CategoryId"].ToString()); recipe.Page = int.Parse(formValues["Page"].ToString()); recipe.PublicationId=Convert.ToInt32(formValues["PublicationId"].ToString()); Allows the CategoryId and Page properties to be updated, and then the error is thrown on the PublicationId. All of the referential integrity is checked an the same in the db and the dbml. Any light shed on this would be most welcome.

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• php while loop throwing a error over a $var < 10 statement

  - by William

  Okay, so for some reason this is giving me a error as seen here: http://prime.programming-designs.com/test_forum/viewboard.php?board=0 However if I take away the '&& $cur_row < 10' it works fine. Why is the '&& $cur_row < 10' causing me a problem? $sql_result = mysql_query("SELECT post, name, trip, Thread FROM (SELECT MIN(ID) AS min_id, MAX(ID) AS max_id, MAX(Date) AS max_date FROM test_posts GROUP BY Thread ) t_min_max INNER JOIN test_posts ON test_posts.ID = t_min_max.min_id WHERE Board=".$board." ORDER BY max_date DESC", $db); $num_rows = mysql_num_rows($sql_result); $cur_row = 0; while($row = mysql_fetch_row($sql_result) && $cur_row < 10) { $sql_max_post_query = mysql_query("SELECT ID FROM test_posts WHERE Thread=".$row[3].""); $post_num = mysql_num_rows($sql_max_post_query); $post_num--; $cur_row++; echo''.$cur_row.'<br/>'; echo'<div class="postbox"><h4>'.$row[1].'['.$row[2].']</h4><hr />' .$row[0]. '<br /><hr />[<a href="http://prime.programming-designs.com/test_forum/viewthread.php?thread='.$row[3].'">Reply</a>] '.$post_num.' posts omitted.</div>'; }

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• Help converting subquery to query with joins

  - by Tim

  I'm stuck on a query with a join. The client's site is running mysql4, so a subquery isn't an option. My attempts to rewrite using a join aren't going too well. I need to select all of the contractors listed in the contractors table who are not in the contractors2label table with a given label ID & county ID. Yet, they might be listed in contractors2label with other label and county IDs. Table: contractors cID (primary, autonumber) company (varchar) ...etc... Table: contractors2label cID labelID countyID psID This query with a subquery works: SELECT company, contractors.cID FROM contractors WHERE contractors.complete = 1 AND contractors.archived = 0 AND contractors.cID NOT IN ( SELECT contractors2label.cID FROM contractors2label WHERE labelID <> 1 AND countyID <> 1 ) I thought this query with a join would be the equivalent, but it returns no results. A manual scan of the data shows I should get 34 rows, which is what the subquery above returns. SELECT company, contractors.cID FROM contractors LEFT OUTER JOIN contractors2label ON contractors.cID = contractors2label.cID WHERE contractors.complete = 1 AND contractors.archived = 0 AND contractors2label.labelID <> 1 AND contractors2label.countyID <> 1 AND contractors2label.cID IS NULL

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• MySQL Query Where Column Like Column

  - by shmeeps

  I'm working on a small project that involves grabbing a list of contacts which are stored for each group. Essentially, the database is set up so that each group has a primary and secondary contact stored as, unsurprisingly, Group.Primary and Group.Secondary. The objective is to pull every Primary and Secondary contact for each Group and display them in a sortable table. I have the sortable table all worked out, but I have come across a small problem. Each primary and secondary field can have more than one contact separated by a comma. For instance, if Primary contained 123,256 , it would need to pull both Contacts with IDs 123 and 256. I had intended to use a query formatted like this: SELECT * FROM Group G, Contacts C WHERE G.Primary LIKE %C.ID% OR G.Secondary LIKE %C.ID% so that I could just skip the comma part, but I can't seem to find a working query for this. My question to you is, am I just overlooking something here? Is there a simple query that would let me do this? Or am I better off getting the groups and contacts separately, and combine the two later. I think the former is a little easier to understand when read, which is a plus as this is a shared project, but if that is not possible I will do the latter. This code is simplified, but it gets the point across.

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• Help me choose between XML or SQL Lite on android

  - by Ngetha

  I have an android app that periodically, say once a week downloads content from a server in XML. The content is used by the app, different Acitivities use different parts of the content. My question is a design one, should I save the data in SQlite or just keep it as an XML file, which one would be faster to read? The app can only use one content piece at a time, which means subsequent XML content downloads replace the old one.

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• Oracle: how to "group by" over a range?

  - by Mark Harrison

  If I have a table like this: pkey age ---- --- 1 8 2 5 3 12 4 12 5 22 I can "group by" to get a count of each age. select age,count(*) n from tbl group by age; age n --- - 5 1 8 1 12 2 22 1 What query can I use to group by age ranges? age n ----- - 1-10 2 11-20 2 20+ 1

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• Transaction within IF THEN ELSE doesn't commit

  - by boris callens

  In my TSQL script I have an IF THEN ELSE structure that checks if a column already exists. If not it creates the column and updates it. IF NOT EXISTS( SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'tableName' AND COLUMN_NAME = 'columnName')) BEGIN BEGIN TRANSACTION ALTER TABLE tableName ADD columnName int NULL COMMIT BEGIN TRANSACTION update tableName set columnName = [something] from [subquery] COMMIT END This doesn't work because the column doesn't exist after the commit. Why doesn't the COMMIT commit?

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• Alternatives to sign() in sqlite for custom order by

  - by Pentium10

  I have a string column which contains some numeric fields, but a lot are 0, empty string or null. The rest are numbers having different range, all positive. I tried to create a custom order by. The order would be done by two fields. First I would like to order the fields that have this number 0 and then sort by name. So something this would work: select * from table order by sign(referenceid) desc, name asc; But Sqlite lacks the sign() -1/0/1 function, and I am on Android and I can't create user defined functions. What other options I have to get this sort done.

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• JSON - Php/SQL iPhone APP Questions/Help

  - by chance

  Hey group, first time posting here I am somewhat new to the JSON/PHP/mySQL world, but been around iPhone designing for the past few years, though this topic of conversation is a while new area I am entering. I have done JSON iPhone examples that allow me to create a UITableView and display the JSON data into the TableViewCells (CustomCells) and displays the data (NSDictionary)into UILabels The problem I am having now, is that I want an APP that displays this information from the JSON into just a couple of UILabel's on a regular UIViewController and not a UITableView any help would greatly be appreciated, the example I used and learned for JSON and UITABLE was from http://tempered.mobi/%20 I used that example from my app, but incorporated a few other things like CUSTOM cells however now when the USER selects the specific CELL I want it to load specific data from another JSON file, and cannot get it to load in a UILabel or UITextView in a UIViewController HELP :-)

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• Entity Framework EntityKey / Foreign Key problem.

  - by Ronny176

  Hi, I keep getting the same error: Entities in 'VlaamseOverheidMeterEntities.ObjectMeter' participate in the 'FK_ObjectMeter_Meter' relationship. 0 related 'Meter' were found. 1 'Meter' is expected. I have the following table structure: Meter 1 <- * ObjectMeter * - 1 VO_Object It is always the same scenario: The first meter is added to the database, the second meter gives the error above. I have the following code in my manager: public List<string> addTemporary(string username, string meterNaam, string readingType, string parentID) { Meter meter = new Meter(); VO_Object voObject = objectManager.getObjectByID(parentID); ObjectMeter objMeter = new ObjectMeter(); meter.readingType = (int)Enum.Parse(typeof(ReadingType), readingType); meter.isActive = true; meter.name = meterNaam; meter.startDate = DateTime.Now; meter.endDate = DateTime.Now.AddYears(6000); meter.uniqueIdentifier = "N/A"; meter.meterType = (int)Enum.Parse(typeof(MeterType), "NA"); meter.meterCategory = (int)Enum.Parse(typeof(MeterCategory), "NA"); meter.energyType = (int)Enum.Parse(typeof(EnergyType), "NA"); meter.utilityType = (int)Enum.Parse(typeof(UtilityType), "NA"); meter.unitOfMeasure = (int)Enum.Parse(typeof(UnitOfMeasure), "NA"); objMeter.valid_from = meter.startDate; objMeter.valid_until = meter.endDate; objMeter.Meter = meter; objMeter.VO_Object = voObject; createMeter(meter); List<String> str = new List<string>(); str.Add("" + meter.meterID); str.Add(meter.name); return str; } and this in my Dao Class which links to the database: internal void CreateMeter(Meter _meter) { _entities.AddToMeter(_meter); _entities.SaveChanges(); } Can someone please explain this error? Ronald

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• how to reverse the order of words in query or c#

  - by Ranjana

  i have stored in the database as location India,Tamilnadu,Chennai,Annanagar while i bind in the grid view it ll be displaying as 'India,Tamilnadu,Chennai,Annanagar' this format. but i need to be displayed as 'Annanagar,Chennai,Tamilnadu,India' in this format. how to perform this reverse order in query or in c#

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• order by for specfic column

  - by kareemsaad

  I want to make order by ASC For specific column from more columns

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• Is CPU execution time different in Loop with Sleep() and Long Loops without sleep(), with both havin

  - by Jagira

  Hello, I have a loop that runs for approx. 25 minutes i.e 1500 seconds. [100 loops with sleep(15)] The execution time for the statements inside loop is very less. My scripts are hosted on GoDaddy. I am sure that they are having some kind of limit on execution time. My question is, are they concerned with "the total CPU execution time" or the total running time.

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• Best way to store a database password in a startup script / config file?

  - by Mark Harrison

  So our web server apps need to connect to the database, and some other apps have startup scripts that execute at boot time. What's the best way to store the name/password for these applications, in terms of security, e.g. perhaps we don't want sysadmins to know the database password maintainability, e.g. making the configuration easy to change when the password changes, etc. both windows and linux solutions appreciated!

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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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