problem about tables join order

dbforums.com - 2012-08-24 04:17:41 - Similar - Report/Block

hi,everybody I have a when I tuning a query. the Sql is something like this : Code: select XXXXX FROM T1 LEFT JOIN T2 ON T1.C1 =T2.C1 INNER JOIN T3 ON T1.C2 = T3.C2 INNER JOIN T4 ON T3.C1= T4.C1 WHERE T4.C2 = 'xxxxxx'; The optimizer chose a bad join order for this query: T4 cross join T1 and then left join T2 and then inner jo...

What's the best way to determine whether a polymorphic join table is appropriate

stackoverflow.com - 2012-02-25 11:21:11 - Similar - Report/Block

I'm trying to figure out whether I should make a polymorphic join table for a many to many relationship or whether I should make multiple join tables. For things like comments, I always use a polymorphic join table. For relationships between users, like following on Twitter, I don't use polymorphic join tables. This is just out of habit.

ORDER BY datetime makes the query very slow

stackoverflow.com - 2013-03-20 00:02:14 - Similar - Report/Block

I am trying to pull data from multiple tables and when I user ORDER BY a datetime field it return the results after at least 10 seconds but if I do the same query without ORDER BY then it return the results for under 2 seconds. This is my current query SELECT ph.call_subject AS callSubject, ac.account_name AS accountName, DATE_FORMAT(ph.t...

SQL wrong result

stackoverflow.com - 2013-04-09 12:37:41 - Similar - Report/Block

I have multiple tables: order (id,quantity, status, notes, item_id, customer_id) item (id,number, name) order_items(order_id, item_id) customer(id, name) I have simple program in which in main window I have orders and their statuses(done, pending) that I show on datagridview . If I double click on a row, I collect new variable which i...

More than 2 tables JOIN in LINQ, scope issue

stackoverflow.com - 2012-07-01 13:18:50 - Similar - Report/Block

I am trying to join 3 table in LINQ. var fromCities = from c in cityRepository.Cities join r in routeRepository.Routes on c.Id equals r.FromCityId join cr in rentDetailRepository.CarRentDetails on cr.CityId equals c.Id select c; I am getting that cr and c do not exist in the second join statement? Could somebody help?...

Doctrine DQL: erroneous sql generation (?)

stackoverflow.com - 2012-06-16 21:44:19 - Similar - Report/Block

I'm haveing big troubles while developing a quietly advanced DQL query for a tiny DMS: The schema: DmsObject is a superclass for which two subclasses exist (document and folder) UserRights and GroupRight (which are associative entities in the db, pointing respectively to user and group tables). User and Group represent (obvious) the dms "...

Join tables with Aggregate value

stackoverflow.com - 2013-06-10 05:46:24 - Similar - Report/Block

I've two tables, named Table-A and Table-B. Please refer given tables . I want to join these after taking the aggregate of 'Value' column in both tables. For eg; TABLE-A Name Value1 ABC 10 ABC 18 ABC 12 DEF 5 XYZ 15 XYZ 16 TABLE-B Name Value2 ABC 15 ABC 5 XYZ 9 My expected result is, Result Name Value1 Value2 ABC 40 20 DEF 5...

Entity Framework 4 - What is the syntax for joining 2 tables then paging them?

stackoverflow.com - 2012-04-19 07:39:07 - Similar - Report/Block

I have the following linq-to-entities query with 2 joined tables that I would like to add pagination to: IQueryable<ProductInventory> data = from inventory in objContext.ProductInventory join variant in objContext.Variants on inventory.VariantId equals variant.id where inventory.ProductId == productId where inventory.StoreId ==...

Count Total Rows For All Tables In MS SQL Server

4rapiddev.com - 2012-09-27 23:31:44 - Similar - Report/Block

This SQL script below will count and display list of table name along with total rows for all tables in a specified MS SQL Server Database. Instead of using: SELECT COUNT FROM TABLE_NAME … for each table in the database, we can query the system tables as below: SELECT sysobjects Name TableName sysindexes ROWS TotalRows FROM sysobjec...

Tools to visualize a database and understand the datamodel quickly

stackoverflow.com - 2009-12-29 00:53:10 - Similar - Report/Block

I have several SQL Server 2005 databases ranging from 20 – 600 tables in an application and no documentation. I am looking for a database diagramming tool that is smart enough to pick tables that seem to be related to one entity (e.g., tables related to Patient, tables related to Orders) or one functionality (e.g., Patient Management, Ord...

mysql - How to fix this query?

stackoverflow.com - 2012-02-22 03:21:57 - Similar - Report/Block

I am really having a headache since the other day on how to fix this mysql statement to get my desired result. I also want to inform that I am new to mysql and prorgramming. I have 4 tables CUSTOMER, CUSTOMER_ACCT_SETTING, DEBT, and PAYMENT. Here are the 4 tables with their record so you can relate. CUSTOMER CUSTOMER_ACCT_SETTING PAYMENT...

Python Qt QFileDialog::getopenFileNames - File select order

stackoverflow.com - 2012-06-10 16:27:24 - Similar - Report/Block

I'm writing a small Python code to join text files, and the files are selected as an user input. But it's important that I get the order of the users selection, as I want to join the files in the selected order. But I see that the list returned by getOpenFileNames does not preserve the selection order. Does anybody have any suggestion to...

evolveStar Join

Delete from 2 tables using cascade and join table in sql and c#

stackoverflow.com - 2013-03-21 16:10:05 - Similar - Report/Block

I have a winForms application which have a DB. Now in the DB I have those tables: 1. table A (PK = Identity - auto increment) 2. table B (PK = Identity - auto increment) 3. table C (FK = table A's PK and table B's PK) Tables A and B are strangers so I added the table C to connect between them. I'm trying to do a cascading deletion, so...

SQL Update after Joining Two Tables

stackoverflow.com - 2013-03-18 16:10:32 - Similar - Report/Block

I am new to SQL, using Microsoft SQL Server Management Studio. I am trying to write a SQL statement that performs an update after two tables are joined. I have two tables: myTable1 and myTable2 . Both share a field MyID , which is going to be the field that I join on. myTable1 contains a column called BitToUpdate . And MyTable2 contains...

Should EF's DbContext contains all tables?

stackoverflow.com - 2012-04-14 04:02:36 - Similar - Report/Block

I'm new to EF4, and I'm trying to figure out the best way to create my DbContext class(es). Is there any problem (specially performance) in putting all my tables / entities into one and only one DbContext class, like the code below? public class AllInOneDb : DbContext public DbSet<Customer> Customers{ get; set; } public DbSet<A...

Problems translating an SQL query to LINQ in VS Lightswitch

stackoverflow.com - 2013-01-31 09:01:15 - Similar - Report/Block

So, I am having an issue with an SQL query that is translated LINQ (and works - tested), but that same LINQ query does not work in Lightswitch. Of course I did not expect to work straight out, but I am struggling to properly convert it. So here is a image of the tables that I base my query on: http://dl.dropbox.com/u/46287356/tables. PNG (...

Codeigniter 2.1, MySQL - two left joins

stackoverflow.com - 2013-04-11 14:59:40 - Similar - Report/Block

I have query like this: $q = " SELECT C.*, count(K.id_komentar) broj_komentara FROM clanak C LEFT JOIN kategorija KAT ON C.kategorija_id = KAT.id_kategorija LEFT JOIN komentari K ON C.id_clanak = K.clanak_id GROUP BY C.id_clanak ORDER BY datum_kreiranja DESC "; return $this->db->query($q)->result_array(); Count part is working, but...

querying multiple tables order by time in tables

stackoverflow.com - 2012-06-17 15:45:08 - Similar - Report/Block

Actually I am stuck in middle of some mysql code. Can anyone suggest a simple question. I have 6-10 (multiple) tables in a database all having different data means not related to each other. There is no relation between tables, but have posted time inserted in each of the columns of all the tables. All I want is query all the tables sorte...

SQL Server INNER JOIN with nulls value and intersect

stackoverflow.com - 2012-03-27 22:16:52 - Similar - Report/Block

I have a problem. I have two tables with the same columns. I want to create a third table which will be have id's rows from these two tables where four chosen columns will be the same. I resolved problem with comparing data null with isnull. I wrote something like this: WITH cteCandidates (City, Street, HouseNumber, PostCode) SELECT...

Guilty Crown COSPLAY

deviantart.com - 2012-03-15 13:56:11 - Similar - Report/Block

小吉 as Shibungi LALAax as Gai D.D as Arugo 冰棍 as Oogumo PHOTO THX 辰 那一年,大 家都还活得 好好的。。 。没有人挂 ,也没有人 黑化==...

how to make a right join using LINQ to SQL & C#

stackoverflow.com - 2012-03-28 21:49:38 - Similar - Report/Block

Hey guys I'm having a problem creating the following SQL Statement using LINQ & C# select c.IDAddenda, c.Descripcion from CatAddendas c right join EmpresaAddenda e on e.IDAddenda = c.IDAddenda where e.rfc = 'SUL010720JN8' order by c.IDAddenda asc I got this public IEnumerable<CatAddenda> TraeAddendas(string rfc)...

Hibernate @One-To-Many similar to @ElementCollection

stackoverflow.com - 2012-06-27 23:08:03 - Similar - Report/Block

I am trying to do something like this, but using @One-To-Many instead of @ElementCollection. public class Book { ... @ElementCollection Set<String> tags; ... This creates two tables, one for Book and one for the Tags with (BookID, Tag) which works fine, except for the fact that I can't use Criteria with @ElementCollection. So I...

SSIS: recordset or temp table

stackoverflow.com - 2012-06-12 06:10:36 - Similar - Report/Block

I have an SSIS application that needs to get data from 2 databases of different servers (not link). I need to get the match names and DOB records between 2 database then use the results to insert/update a table. My initial approach is to use OLE DB source then Merge Join and put the results to recordset. Then on controlflow, use the resul...

Join two un-related tables using JPA EntityManager

stackoverflow.com - 2012-03-28 18:13:36 - Similar - Report/Block

I need to join two JPA entities on a property when there is no FK/PK relation between the two. I am using Hibernate and can use HQL query like this select foo, barfrom FooEntity as foo, BarEntity as bar where foo.someothercol = 'foo' and foo.somecol = bar.somecol However, I want to avoid dependency on Hibernate and use EntityManager...

Convert SQL to HQL | Order By with LEFT(not join)

stackoverflow.com - 2012-05-09 06:23:50 - Similar - Report/Block

I am trying to order a result set based on partial order of a column using the following query: select ID,NAME from person order by LEFT(NAME,2) desc How can I write an equivalent Hibernate Criteria/HQL? I have looked up in the Hibernate Reference manual, I am not able to find anything that relates to the LEFT sql-function. I am workin...

Prefix tables with entity framework automatic code migrations

stackoverflow.com - 2013-03-25 13:24:53 - Similar - Report/Block

I started a new project C#, and I used the "enable-migrations" command in the package console window. This naturally added migrations to my project. I then set automatic migrations to true, so that as I call "update-database" it will create my tables for me with all keys and that. The only problem is that I have multiple websites where wa...

Generated doctrine entities for specific tables

stackoverflow.com - 2012-04-27 18:31:02 - Similar - Report/Block

I am working on migrating a legacy enterprise app to Symfony2. When it is all done we will have dozens of tables. Each application uses a subset of the tables, and we want to keep the tables in 3 databases, not one database per Symfony bundle. Is it possible to use the doctrine command line tools to generate metadata and entities for just...

Periodic Table With Names for Android

androidzoom.com - 2013-05-13 11:37:26 - Similar - Report/Block

Appsrus Periodic tables are of many types. The periodic tables are tables where you can set in your custom made preferences and get the elements of your choice as you want. Periodic tables with names are the tables where you can get a large list of names... FREE

Query with table, temp table, subquery join issues

stackoverflow.com - 2013-02-21 22:16:13 - Similar - Report/Block

I have a query where I create 2 temp tables at the start, then I query an existing table in my DB and join this table to a subquery, and then lastly join to 1 of the temp tables. When i do this I get an error that the key I'm joining on from the existing table cannot be bound. What's weird is if I take out all references to the subquery a...

How to implement a temporal table using JPA?

stackoverflow.com - 2012-03-03 01:50:40 - Similar - Report/Block

I would like to know how to implement temporal tables in JPA 2 with EclipseLink. By temporal I mean tables who define validity period. One problem that I'm facing is that referencing tables can no longer have foreign keys constraints to the referenced tables (temporal tables) because of the nature of the referenced tables which now their...

How to pass several values in a single post parameter in CodeIgniter?

stackoverflow.com - 2012-06-15 23:51:12 - Similar - Report/Block

I'm using the chosen UI library to select multiple values for a post param named 'tables'. In the Chrome network console I can check that is working how I expected: Form data checkin:2012-06-15 16:00:00 checkout:2012-06-15 17:00:00 tables:14 tables:15 tables:16 customer:28 But when I try to recover this tables info in the controller var_...

Migration of SQL Server to Oracle Database

stackoverflow.com - 2013-05-02 05:36:09 - Similar - Report/Block

In Sql server, My Procedure will create temporary tables where column names are dynamically comes from every user, then inserts the data into the temporary tables and i use the data further based on the requirement. Finally, we drop the temporary tables. There is no problem when we create temporary tables with the same name and with diffe...

Translating SQL joins on foreign keys to data.table syntax

stackoverflow.com - 2012-03-28 21:58:25 - Similar - Report/Block

data.table package provides many of the same table handling methods as SQL, and each table can have one or more keys. In this example, are data.tables with a primary key "id"; also has a foreign key "x_id" X <- data.table(id = 1:4, a=LETTERS[c(1,1:3)],b=4:7,key="id") Y <- data.table(id = c(1,3,5,7), x_id=4:1, key="id") The...

SQL Server - Retrieve last record for each table in a database

stackoverflow.com - 2012-02-27 19:30:25 - Similar - Report/Block

I am looking for the last record entered in each table of the database. I know how to return the last record for each table one at a time. However, I need to loop through all the tables (about 10,000) and find the last record posted. I can do this by scripting (i.e. get all tables into an array and then doing a for each). Is there a w...

Postgres - calculation being returned as string in Rails

stackoverflow.com - 2012-04-02 03:45:23 - Similar - Report/Block

In the method below, I do ol.price * ol.committed. price is a decimal (40.00) def self.find_for_order(order) if order select("ol.*, p.name as name, (ol.price * ol.committed) as sku_total, p.price as price, p.style_number AS product_style_number, p.name"). from("order_lines ol"). joins("LEFT JOIN skus s ON s.sku_nu...

Pivot Chart Error

excelforum.com - 2013-02-04 16:43:17 - Similar - Report/Block

I am having a problem with charts made off of pivot tables in Excel 2010. If I make a chart off of one pivot table and then make a change to a filter or hit the undo button at a later time then my pivot chart will malfunction and tie into another pivot tables data rather than the specific pivot it should be tied to. All of my pivot tables...

Join in sqlite Android

stackoverflow.com - 2012-04-02 13:15:46 - Similar - Report/Block

I have two tables in my database table1, table2. I have a join query like this: select a.*,b.* from table1 a,table2 b where a.field1=b.field1; Its working fine while i test it in sqlite manager(sqlite browser). when i try to make it through java like this: database.execSQL("select a.*,b.* from table1 a,table2 b where a.field1=b.field1;")...

Error 3296: Join expression not supported in MS Access Query with multiple JOIN

stackoverflow.com - 2012-03-02 17:16:15 - Similar - Report/Block

I'm using Access 2003 and doing a make table query. The idea is, I have multiple tables containing all kinds of info on a list of funds, and I am trying to combined them. All tables have FundID as one of the fields, and this is the field we use to identify each individual fund. There's a table for a field MER, which are updated from time...

Запрос на отображение связанных таблиц - C# для начинающих

cyberforum.ru - 2013-05-03 05:27:25 - Similar - Report/Block

Добрый день. Проблема с отображением связанных таблиц. Имеется БД access с 5 таблицами. Схема данных Вложение 263069 В один dataGridView надо вывести информацию из главной таблицы Film + ФИО режиссера, связанного с фильмом и ФИО актера. Код: binding = new BindingSource(); string qs = "SELECT Film.id, Nazv,Date_out,Dlit,Mark,Country, Reg.R...

БД в ListView

cyberforum.ru - 2012-07-23 20:31:23 - Similar - Report/Block

Нужно вывести названия таблиц из ,но не все, определенные две таблицы должны постоянно не выводится Как вывести все знаю,вот код: Использую Absolute Database. Код: //lvTables: TListView; tables: TStringList; i: integer; begin Database.Open; tables := TStringList.Create; try Database.GetTablesList(tables); for i:=0 to tables.Count-1...


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