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  • Deleting huge chunks of data from mysql innodb

    - by ming yeow
    I need to delete a huge chunk of my data in my production database, which runs about 100GB in size. If possible, i would like to minimize my downtime. My selection criteria for deleting is likely to be DELETE * FROM POSTING WHERE USER.ID=5 AND UPDATED_AT<100 What is the best way to delete it? Build an index? Write a sequential script that deletes via paginating through the rows 1000 at a time?

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  • LLBLGEN: Linq to LLBGEN don't work

    - by StreamT
    I want to make custom select from the database table using Linq. We use LLBGEN as ORM solution. I can't do LINQ query to Entities Collection Class unless I call GetMulti(null) method of it. Is it possible to do LINQ query to LLBGEN without extracting all table first? BatchCollection batches = new BatchCollection(); BatchEntity batch = batches.AsQueryable() .Where(i => i.RegisterID == 3) .FirstOrDefault(); // Exception: Sequence don't contains any elements batches = new BatchCollection(); batches.GetMulti(null); // I don't want to extract the whole table. BatchEntity batch = batches.AsQueryable() .Where(i => i.RegisterID == 3) .FirstOrDefault(); //Works fine

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  • How to Set Customer Table with Multiple Phone Numbers? - Relational Database Design

    - by user311509
    CREATE TABLE Phone ( phoneID - PK . . . ); CREATE TABLE PhoneDetail ( phoneDetailID - PK phoneID - FK points to Phone phoneTypeID ... phoneNumber ... . . . ); CREATE TABLE Customer ( customerID - PK firstName phoneID - Unique FK points to Phone . . . ); A customer can have multiple phone numbers e.g. Cell, Work, etc. phoneID in Customer table is unique and points to PhoneID in Phone table. If customer record is deleted, phoneID in Phone table should also be deleted. Do you have any concerns on my design? Is this designed properly? My problem is phoneID in Customer table is a child and if child record is deleted then i can not delete the parent (Phone) record automatically.

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  • Full Text Search MSSQL2008 show wrong display_item for Thai Language

    - by ensecoz
    I am working on MSSQL2008. My task is to investigate the issue that why FTS cannot find the right result for Thai. First, I am having the table which enable the FTS on the column 'ItemName' which is nvarchar. The Catalog is created with the Thai Language. Note that, Thai language is one of the language that doesn't separate the word by space so '????' '???' '????' are written like this in the sentence '???????????' In the table, there are many rows that include the word (????) for examples row#1 (ItemName: '???????????') On the webpage, I try to search for '????' but SQLServer cannot find it. So I try to investigate it by trying the following query in SQLServer select * from sys.dm_fts_parser(N'"???????????"', 1054, 0, 0) To see how the words are broken. The first one is the text to be break. The second parameter is specify that using Thai (WorkBreaker, so on). and here is the result: row#1 (display_item: '????', source_item: '???????????') row#2 (display_item: '????', source_item: '???????????') row#3 (display_item: '??', source_item: '???????????') Notice that the first and second row display the worng display_item '?' in the '????' isn't even Thai characters. '?' in '????' is not Thai charater either. So the question is where is those alien characters come from? I guess this i why I cannot search for '????' because the word breaker is mis-borken and keeping the wrong character in the indexes. Please help!

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  • Use SQL Result to Query second time and grab more results via php

    - by maxwell
    I am grabbing a list of school names from a database. When the user clicks on the school name, i want the code to fetch 2-3 other attributes related to the school name that the user has clicked on. My code for the single school name list: $query = mysql_query("Select schoolname, product, username, password from credentials c join products p on p.productid = c.productid join schools s on s.schoolid = c.schoolid join icons i on i.productid = p.productid order by s.schoolname"); echo '<ul>'; while($row = mysql_fetch_array($query)) { echo "<li> <a href='#'>" . $row['schoolname'] . "</a> </li>"; } echo ''; Current Output: School A School A School B School B School B School C School C Expected Output: School name displayed only once (distinct won't work because each school name has 2-3 product credentials School A School B School C Ability for User to click on a school. then the school names underneath will move down (toggle effect) and user can see product, username and password displayed for the school clicked (for example: user clicked on School A) School A productname1, username, password productname2, username, password School B School C

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  • mysql error in php

    - by fusion
    i'm trying to run this php code which should display a quote from mysql, but can't figure out where is it going wrong. the result variable is null or empty. can someone help me out. thanks! <?php include 'config.php'; // 'text' is the name of your table that contains // the information you want to pull from $rowcount = mysql_query("select count(*) as rows from quotes"); // Gets the total number of items pulled from database. while ($row = mysql_fetch_assoc($rowcount)) { $max = $row["rows"]; //print_r ($max); } // Selects an item's index at random $rand = rand(1,$max)-1; print_r ($rand); $result = mysql_query("select * from quotes limit $rand, 1") or die ('Error: '.mysql_error()); if (!$result or mysql_num_rows($result)) { echo "Empty"; } else{ while ($row = mysql_fetch_array($result)) { $randomOutput = $row['cQuotes']; echo '<p>' . $randomOutput . '</p>'; } }

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  • Get more records that appear more than once

    - by milo2010
    How can I see all the records that appear more than once per day? I have this table: ID Name Date 1 John 27.03.2010 18:17:00 2 Mike 27.03.2010 16:38:00 3 Sonny 28.03.2010 20:23:00 4 Anna 29.03.2010 13:51:00 5 Maria 29.03.2010 21:59:00 6 Penny 29.03.2010 17:25:00 7 Alba 30.03.2010 09:36:00 8 Huston 31.03.2010 10:19:00 I wanna get: 1 John 27.03.2010 18:17:00 2 Mike 27.03.2010 16:38:00 4 Anna 29.03.2010 13:51:00 5 Maria 29.03.2010 21:59:00 6 Penny 29.03.2010 17:25:00

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  • What is C# equivalent of PHP's mysql_fetch_array function?

    - by Mike Biff
    I am learning C#/ASP.NET and I am wondering what the C# equivalent of the following PHP code is? I know the userid, and I want to fetch the rows from this table into the array of the variable "row", so I then can use it as "row['name']" and "row['email']. $result = mysql_query("SELECT email, name FROM mytable WHERE id=7"); while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) { printf("Email: %s Name: %s", $row["email"], $row["name"]); } Thanks.

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  • Problem counting item frequency on T-SQL

    - by Raúl Roa
    I'm trying to count the frequency of numbers from 1 to 100 on different fields of a table. Let's say I have the table "Results" with the following data: LottoId Winner Second Third --------- --------- --------- --------- 1 1 2 3 2 1 2 3 I'd like to be able to get the frequency per numbers. For that I'm using the following code: --Creating numbers temp table CREATE TABLE #Numbers( Number int) --Inserting the numbers into the temp table declare @counter int set @counter = 0 while @counter < 100 begin set @counter = @counter + 1 INSERT INTO #Numbers(Number) VALUES(@counter) end -- SELECT #Numbers.Number, Count(Results.Winner) as Winner,Count(Results.Second) as Second, Count(Results.Third) as Third FROM #Numbers LEFT JOIN Results ON #Numbers.Number = Results.Winner OR #Numbers.Number = Results.Second OR #Numbers.Number = Results.Third GROUP BY #Numbers.Number The problem is that the counts are repeating the same values for each number. In this particular case I'm getting the following result: Number Winner Second Third --------- --------- --------- --------- 1 2 2 2 2 2 2 2 3 2 2 2 ... When I should get this: Number Winner Second Third --------- --------- --------- --------- 1 2 0 0 2 0 2 0 3 0 0 2 ... What am I missing?

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  • cakephp and SQL_CALC_FOUND_ROWS

    - by Lizard
    I am trying to add the SQL_CALC_FOUND_ROWS into a query (Please note this isn't for pagination) please note I am trying to add this to a cakePHP query the code I currently have is below: return $this->find('all', array( 'conditions' => $conditions, 'fields'=>array('SQL_CALC_FOUND_ROWS','Category.*','COUNT(`Entity`.`id`) as `entity_count`'), 'joins' => array('LEFT JOIN `entities` AS Entity ON `Entity`.`category_id` = `Category`.`id`'), 'group' => '`Category`.`id`', 'order' => $sort, 'limit'=>$params['limit'], 'offset'=>$params['start'], 'contain' => array('Domain' => array('fields' => array('title'))) )); Note the 'fields'=>array('SQL_CALC_FOUND_ROWS',' this obviously doesn't work as It tries to apply the SQL_CALC_FOUND_ROWS to the table e.g. SELECTCategory.SQL_CALC_FOUND_ROWS, Is there anyway of doing this? Any help would be greatly appreciated, thanks.

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  • How to check if a field is an Image field

    - by AJ
    Hello, This might seem an easy question for some, but I am struggling with it. I am trying to use SQLDataReader.GetFieldType to check if a certain field is an Image field. Lets assume the first field of the result set is an Image field, if I do: reader.GetFieldType(0).ToString; I get System.Byte[] But is this the correct way to check for it? I really don't like: if (reader.GetFieldType(0).ToString="System.Byte[]") Is there a better way? Thanks, AJ

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  • Linq Projection Question

    - by Micah
    I'm trying to do the following: from c in db.GetAllContactsQuery() select new { ID= c.ID, LastName = c.LastName, FirstName = c.FirstName, Email = c.Email, City =c.City+" "+c.State } The issue i'm running into is that if c.City or c.State are null, the City property returns null. How can I put a function right beside that City= declaration?

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  • PerformancePoint dashboard permissions problem in MOSS

    - by Nathan DeWitt
    I have a PerformancePoint dashboard running in MOSS 2007 portal. The dashboard consists of one SSRS 2005 report, running in SharePoint Integrated mode. NT Authority\Authenticated Users have read permissions to the report library containing the SSRS report, the dashboard, and the report library containing the dashboard. Users that attempt to access the dashboard receive the following error message: The permissions granted to user 'DOMAIN\firstname.lastname' are insufficient for performing this operation. (rsAccessDenied) Users that then click on the direct link to the report in MOSS will see the report with no problem. Subsequent visits to the dashboard show the report with no problem. The report is using a data source that is located one folder up from the report location. The report has been updated to point to the correct shared data source after deployment. Both the report and the data source have been published. The data source is using stored credentials, with a domain service account that has been set to Use as Windows credentials. This service account is serving other reports in other areas with no problem. Edit: Ok, I've gotten a lot more information on this problem. The request is never actually being made to the data source. The user comes in to the dashboard and requests a report for the first time using their kerberos token identifying themselves. The report looks in the Report Server database and finds that they are not listed in the users table and generates this rsAccessDenied error. Once they view the report directly their name is in this table and they never have the problem again. Unfortunately, removing the user from the Users table in the RS database doesn't actually cause this error to happen again. Everything I've read says that when you run a Report Server in MOSS integrated mode all your permissions are handled at the MOSS report library level, and all Auth users have permissions to the report library, as stated earlier. Any ideas?

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  • How to use sum and count functions

    - by Odette
    hi guys I am trying to get the total count and total sum per salesperson but its not working in my WITH query Currently I have: WITH CALC1 AS (SELECT B.OTSMAN AS SALESMAN, COUNT(B.ONINUM) AS COUNT, SUM(B.OVSVAL) AS SVAL FROM @[email protected] AS B WHERE B.OCSGRP <> 'INT' AND B.OCSGRP <> 'INX' AND B.OCPSBR IN (@OCPSBR@) AND B.ICMATX <> '705' AND B.OCSGRP NOT LIKE 'S/%' GROUP BY B.OTSMAN, B.ONINUM ORDER BY B.OTSMAN ASC) SELECT SALESMAN, COUNT, SVAL FROM CALC1 ORDER BY SALESMAN THE RESULT IS: AM 1 79.03 AM 40 1337.70 AM 48 4627.15 AM 42 2727.40 AM 1 111.79 AM 1 1110.00 AM 52 3018.77 How do i change my query so I only get one record with the total count and value per salesperson? AM 1 13,011.84

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  • Difference b/w putting condition in JOIN clause versus WHERE clause

    - by user244953
    Suppose I have 3 tables. Sales Rep Rep Code First Name Last Name Phone Email Sales Team Orders Order Number Rep Code Customer Number Order Date Order Status Customer Customer Number Name Address Phone Number I want to get a detailed report of Sales for 2010. I would be doing a join. I am interested in knowing which of the following is more efficient and why ? SELECT O.OrderNum, R.Name, C.Name FROM Order O INNER JOIN Rep R ON O.RepCode = R.RepCode INNER JOIN Customer C ON O.CustomerNumber = C.CustomerNumber WHERE O.OrderDate >= '01/01/2010' OR SELECT O.OrderNum, R.Name, C.Name FROM Order O INNER JOIN Rep R ON (O.RepCode = R.RepCode AND O.OrderDate >= '01/01/2010') INNER JOIN Customer C ON O.CustomerNumber = C.CustomerNumber

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  • should this database table be normalized?

    - by oo
    i have taken over a database that stores fitness information and we were having a debate about a certain table and whether it should stay as one table or get broken up into three tables. Today, there is one table called: workouts that has the following fields id, exercise_id, reps, weight, date, person_id So if i did 2 sets of 3 different exercises on one day, i would have 6 records in that table for that day. for example: id, exercise_id, reps, weight, date, person_id 1, 1, 10, 100, 1/1/2010, 10 2, 1, 10, 100, 1/1/2010, 10 3, 1, 10, 100, 1/1/2010, 10 4, 2, 10, 100, 1/1/2010, 10 5, 2, 10, 100, 1/1/2010, 10 6, 2, 10, 100, 1/1/2010, 10 So the question is, given that there is some redundant data (date, personid, exercise_id) in multiple records, should this be normalized to three tables WorkoutSummary: - id - date - person_id WorkoutExercise: - id - workout_id (foreign key into WorkoutSummary) - exercise_id WorkoutSets: - id - workout_exercise_id (foreign key into WorkoutExercise) - reps - weight I would guess the downside is that the queries would be slower after this refactoring as now we would need to join 3 tables to do the same query that had no joins before. The benefit of the refactoring allows up in the future to add new fields at the workout summary level or the exercise level with out adding in more duplication. any feedback on this debate?

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  • How do you tell if your migrations are up to date with migratordotnet?

    - by Lance Fisher
    I'm using migratordotnet to manage my database migrations. I'm running them on application setup like this, but I would also like to check on application startup that the migrations are up to date, and provide the option to migrate to latest. How do I tell if there are available migrations that need to be applied? I see that I can get the migrations that were applied like this var asm = Assembly.GetAssembly(typeof(Migration_0001)); var migrator = new Migrator.Migrator("SqlServer", setupInfo.DatabaseConnectionString, asm); var applied = migrator.AppliedMigrations; I like to do something like this: var available = migrator.AvailableMigrations; //this property does not exist.

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  • Is possible to reuse subqueries?

    - by Gothmog
    Hello, I'm having some problems trying to perform a query. I have two tables, one with elements information, and another one with records related with the elements of the first table. The idea is to get in the same row the element information plus several records information. Structure could be explain like this: table [ id, name ] [1, '1'], [2, '2'] table2 [ id, type, value ] [1, 1, '2009-12-02'] [1, 2, '2010-01-03'] [1, 4, '2010-01-03'] [2, 1, '2010-01-02'] [2, 2, '2010-01-02'] [2, 2, '2010-01-03'] [2, 3, '2010-01-07'] [2, 4, '2010-01-07'] And this is want I would like to achieve: result [id, name, Column1, Column2, Column3, Column4] [1, '1', '2009-12-02', '2010-01-03', , '2010-01-03'] [2, '2', '2010-01-02', '2010-01-02', '2010-01-07', '2010-01-07'] The following query gets the proper result, but it seems to me extremely inefficient, having to iterate table2 for each column. Would be possible in anyway to do a subquery and reuse it? SELECT a.id, a.name, (select min(value) from table2 t where t.id = subquery.id and t.type = 1 group by t.type) as Column1, (select min(value) from table2 t where t.id = subquery.id and t.type = 2 group by t.type) as Column2, (select min(value) from table2 t where t.id = subquery.id and t.type = 3 group by t.type) as Column3, (select min(value) from table2 t where t.id = subquery.id and t.type = 4 group by t.type) as Column4 FROM (SELECT distinct id FROM table2 t WHERE (t.type in (1, 2, 3, 4)) AND t.value between '2010-01-01' and '2010-01-07') as subquery LEFT JOIN table a ON a.id = subquery.id

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  • Rows dropping when I try to join data from two tables

    - by blcArmadillo
    I have a fairly simple query I'm try to write. If I run the following query: SELECT parts.id, parts.type_id FROM parts WHERE parts.type_id=1 OR parts.type_id=2 OR parts.type_id=4 ORDER BY parts.type_id; I get all the rows I expect to be returned. Now when I try to grab the parent_unit from another table with the following query six rows suddenly drop out of the result: SELECT parts.id, parts.type_id, sp.parent_unit FROM parts, serialized_parts sp WHERE (parts.type_id=1 OR parts.type_id=2 OR parts.type_id=4) AND sp.parts_id = parts.id ORDER BY parts.type_id In the past I've never really dealt with ORs in my queries so maybe I'm just doing it wrong. That said I'm guessing it's just a simple mistake. Let me know if you need sample data and I'll post some. Thanks.

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  • Mysql query problem....

    - by Avinash
    I have below values in my database. been Lorem Ipsum and scrambled ever scrambledtexttextofandtooktooktypetexthastheunknownspecimenstandardsincetypesett Here is my query: SELECT nBusinessAdID, MATCH (`sHeadline`) AGAINST ("text" IN BOOLEAN MODE) AS score FROM wiki_businessads WHERE MATCH (`sHeadline`) AGAINST ("text" IN BOOLEAN MODE) AND bDeleted ="0" AND nAdStatus ="1" ORDER BY score DESC, bPrimeListing DESC, dDateCreated DESC It's not fetching first result, why? It should fetch first result because its contain text word in it. I have disabled the stopword filtering. This one is also not working SELECT nBusinessAdID, MATCH (`sHeadline`) AGAINST ('"text"' IN BOOLEAN MODE) AS score FROM wiki_businessads WHERE MATCH (`sHeadline`) AGAINST ('"text"' IN BOOLEAN MODE) AND bDeleted ="0" AND nAdStatus ="1" ORDER BY score DESC, bPrimeListing DESC, dDateCreated DESC Thanks Avinash

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  • Inserting "null" (literally) in to a stored procedure parameter.

    - by Nazadus
    I'm trying to insert the word "Null" (literally) in to a parameter for a stored procedure. For some reason SqlServer seems to think I mean NULL and not "Null". If I do a check for IF @LastName IS NULL // Test: Do stuff Then it bypasses that because the parameter isn't null. But when I do: INSERT INTO Person (<params>) VALUES (<stuff here>, @LastName, <more stuff here>); // LastName is 'Null' It bombs out saying that LastName doesn't accept nulls. I would seriously hate to have this last name, but someone does... and it's bombing the application. We're using SubSonic 2.0 (yeah, it's fairly old but upgrading is painful) as our DAL and stepping through it, I see it does create the parameters properly (for what I can tell). I've tried creating a temp table to see if I could replicate it manually but it seems to work just fine. Here is the example I create: DECLARE @myval VARCHAR(50) SET @myval = 'Null' CREATE TABLE #mytable( name VARCHAR(50)) INSERT INTO #mytable VALUES (@myval) SELECT * FROM #mytable DROP table #mytable Any thoughts on how I can fix this?

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  • Storing a SHA512 Password Hash in Database

    - by Chris
    In my ASP.NET web app I'm hashing my user passwords with SHA512. Despite much SO'ing and Googling I'm unclear how I should be storing them in the database (SQL2005) - the code below shows the basics of how I'm creating the hash as a string and I'm currently inserting it into the database into a Char(88) column as that seems to be the length created consistently Is holding it as a String the best way to do it, if so will it always be 88 chars on a SHA512 (as I have seen some bizarre stuff on Google)? Dim byteInput As Byte() = Encoding.UTF8.GetBytes(sSalt & sInput) Dim hash As HashAlgorithm = New SHA512Managed() Dim sInsertToDatabase As String = Convert.ToBase64String(hash.ComputeHash(byteInput))

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  • SqlServer2008 - Can I Alter a Scalar Function while it is referenced in many places

    - by Casey C.
    We have a scalar function that returns a DateTime. It performs a couple of quick table selects to get its return value. This function is already in use throughout the database - in default constraints, stored procs, etc. I would like to change the implementation of the function (to remove the table hits and make it more efficient) but apparently I can't do that while it is referenced by other objects in the database. Will I actually need to update every object in the database that references it to remove the reference, update the function and then update all those objects to restore the reference to the function? Thanks for any insight you can give.

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