Search Results

Search found 8603 results on 345 pages for 'altering tables'.

Page 181/345 | < Previous Page | 177 178 179 180 181 182 183 184 185 186 187 188  | Next Page >

  • Two-pass multi way merge sort?

    - by Nimesh
    If I have a relation (SQL) that does not fit in memory and I want to sort the relation using TPMMS (Two-pass multi-way merge sort method). How would I divide the table in sub tables (and how many) that can fit in memory and than merge them? Let's say I am using C#.

    Read the article

  • Why isn't this simple MySQL statement working?

    - by Clark
    I am trying to match a user inputted search term against two tables: posts and galleries. The problem is the union all clause isn't working. Is there something wrong with my code? $query = mysql_query(" SELECT * FROM posts WHERE title LIKE '%$searchTerm%' OR author LIKE '%$searchTerm%' OR location LIKE '%$searchTerm%' OR excerpt LIKE '%$searchTerm%' OR content LIKE '%$searchTerm%' UNION ALL SELECT * FROM galleries WHERE title LIKE '%$searchTerm%' ");

    Read the article

  • Create a trigger on Oracle Databae that updates the field in a table when a field in onether table i

    - by GigaPr
    Hi, i have two tables Order(id, date, note) and Delivery(Id, Note, Date) I want to create a trigger that updates the date in delivery when the date is updated in Order I was thinking to do something like CREATE OR REPLACE TRIGGER your_trigger_name BEFORE UPDATE ON Order DECLARE BEGIN UPDATE Delivery set date = ??? where id = ??? END; How do i get the date and row id? thanks

    Read the article

  • Questions About SQl BulkCopy

    - by chobo2
    Hi I am wondering how can do a mass insert and bulk copy at the same time? I have 2 tables that should be affect by the bulk copy as they both depend on each other. So I want it that if while inserting table 1 a record dies it gets rolled back and table 2 never gets updated. Also if table 1 inserts good and table 2 an update fails table 1 gets rolled back. Can this be done with bulk copy?

    Read the article

  • Entity Framework 4 omits some associations during model generation

    - by kzen
    After creating an EF4 model from a SQL Server database I noticed that all the relationships of my Users table were not imported into the model as associations. All the other relationships were imported fine. My Users table has a PK userId which is a char(7) field and it is integrated into several other tables in the database as an FK but for some reason EF4 does not import these relationships as associations during the model generation process... Does anyone have any ideas why this would be happening?

    Read the article

  • SQL Complex Select - Trouble forming query

    - by JoshSpacher
    I have three tables, Customers, Sales and Products. Sales links a CustomerID with a ProductID and has a SalesPrice. select Products.Category, AVG(SalePrice) from Sales inner join Products on Products.ProductID = Sales.ProductID group by Products.Category This lets me see the average price for all sales by category. However, I only want to include customers that have more than 3 sales records or more in the DB. I am not sure the best way, or any way, to go about this. Ideas?

    Read the article

  • Oracle: How to update master with newest row from detail table?

    - by LukLed
    We have two tables: Vehicle: Id, RegistrationNumber, LastAllocationUserName, LastAllocationDate, LastAllocationId Allocations: Id, VehicleId, UserName, Date What is the most efficient (easiest) way to update every row in Vehicle table with newest allocation? In SQL Server I would use UPDATE FROM and join every Vehicle with newest Allocation. Oracle doesn't have UPDATE FROM. How do you do it in Oracle?

    Read the article

  • SELECT table name that is inside UNION

    - by LexRema
    I have two same tables. I need to union them in such way: SELECT f1,f2, xxx FROM (SELECT * FROM tbl1 UNION ALL SELECT * FROM tbl2) where xxx would query for a table name, where f1 and f2 fields are taken from. Example output: 123 345 'tbl1' -- this rows are from the first table 121 345 'tbl1' 121 345 'tbl1' 123 345 'tbl1' 124 345 'tbl1' 125 345 'tbl2' -- this rows are from the second table 127 345 'tbl2' Thank you in advance.

    Read the article

  • PL/SQL 'select in' from a list of values whose type are different from the outer query

    - by Attilah
    I have the following tables : Table1 ( Col1 : varchar2, Col2 : number, Col3 : number) Table2 ( Col1 : number, Col2 : varchar2, Col3 : varchar2) I want to run a query like this : select distinct Col2 from Table1 where Col1 in ( select Col1 from Table2 ) Table1.Col1 is of type varchar2 while Table2.Col1 is of type number. so, I need to do some casting, it seems but it fails to succeed. The problem is that any attempts to run the query returns the following error : ORA-01722: invalid number 01722. 00000 - "invalid number" *Cause: *Action: Table1.Col1 contains some null values.

    Read the article

  • ODBC: when is the best time to create my database?

    - by mawg
    I have a windows program which generates PGP forms which will be filled in later. Those PHP forms will populate a database. It looks very much like MySql, but I can't be certain, so let's call it ODBC. And, yes, it does have to be a windows program. There will also be PHP forms which query the database - examine which tables and fields it contains and then generates forms which can be used to search the database (e.g, it finds a table with fields "employee_name", etc and generates a form which lets you search based on employee name. Let's call that design time and run time. At design time, some manager or IT guy or similar gets to define the nature of the database and at runtime 1) a worker fills in the form daily and 2) management can extract reports. Here's my question: given that the database is defined at "design time" (and populated at run time), where and how is best to do so? 1 I could use an ODBC interface from the windows program, but I am having difficulty finding something good to work with Delphi. Things like ADO and firebird tend to expect you to already have a database and allow you to manipulate it, but I can find no code example of how to create a database and some tables, so ... 2 I could used DOS commands from Delphi in my windows program. I just tried and got a response to MySql --version, but am not sure if MySql etc are more interactive. That is, can I use a script file or a very long stacked command with semicolons and returns separating? e.g 'CREATE DATABASE db; CREATE TABLE t1;' 3) Since the best way to work with databases seems to be PHP, perhaps my windows program could spit out a PHP page which would, when run in a browser, create the database. I have tried to make this as uncomplicated as I can, but please feel free to ask questions. It may be that there are several valid ways, but there is probably one 'better' solution in terms of ease of implementation or maintenance. Better scratch option 3. What if the user later wants to come back and have the windows program change the input form? It needs to update the database too.

    Read the article

  • SQL query to get most

    - by chama
    I have a database with the following tables: Employee (EmpID, FirstName, LastName, RegionID) EmployeeSkills(EmpID, SkillID) [this is a linking table for the M:N relationship between Employees and skills] Skills(SkillID, Description) I need to list the name of the skill that most employees have. I tried doing a max(count(skillID)), sqlserver said that you can't do an aggregate function on an aggregate function. Any other ideas? Thank you in advance!

    Read the article

  • Hiernate's version values in Grails app

    - by xain
    Hi, looking at a database dump file, and I see many records in various tables with their version number set in values other than 0 (even 94 in one case). I understand it has to do with hibernate locking strategy, but my concern is that today is Sunday, and the site has almost no visitors so is: is this normal ? Or is there a known hibernate bug or even some programming malpractice producing this ? Thanks in advance.

    Read the article

  • Problem in sql query

    - by Vishwa
    Hi I have 2 tables Order and orderDetails table... I have written a inner join SELECT Order.id FROM Order INNER JOIN orderDetails ON Order.id=orderDetails.id I have got the output as id 100 100 100 101 101 from the above data i want the count of each record OUTPUT AS : id count 100 3 101 2 help me i am new to sql

    Read the article

  • 100k+ Records and sp_xml_preparedocument

    - by Jonn
    I've been encountering a seeming deadlock with one of my tables and the only place I can trace it back to is a stored procedure that uses sp_xml_preparedocument on a list of data. The data inserted, btw, consists of a 100k+ records on average. Is it possible that it is causing the deadlock? What other pitfalls does using sp_xml_preparedocument have?

    Read the article

  • 2k rows update is very slow in MySQL

    - by sergeik
    Hi all, I have 2 tables: 1. news (450k rows) 2. news_tags (3m rows) There are some triggers on news table update which updating listings. This SQL executes too long... UPDATE news SET news_category = some_number WHERE news_id IN (SELECT news_id FROM news_tags WHERE tag_id = some_number); #about 3k rows How can I make it faster? Thanks in advance, S.

    Read the article

  • How to create multiple inputs in yii + Q&A admin page

    - by user1764357
    In yii, i am developing page for Creating Question with multiple options using forms. So i have two tables Question QuestionId Question optionId Option OptionId Option To create multiple options, option field should be provided with add button so that after clicking add button, it should display new textbox control to get the new option. All these options displayed in a gridview. So can you please help me. I am very new to yii.

    Read the article

  • Oracle: what information can I derive from the SCN?

    - by Mark Harrison
    Given an SCN (system change number), and assuming an SCN for which the data is still in the undo logs, what information about the SCN can I derive? of course, SCN_TO_TIMESTAMP() gives an approximate time the data was committed. Is there any other information I can derive? What transaction, what tables, what data were affected? etc?

    Read the article

  • domain name vs ip address, same server, but different speed

    - by bn
    I have two similar sites: - two of them have almost exactly the same codes, and running on the same server - both sites are the same, they just use different language. - database of the slower site is populated (maybe only the user table) the other tables for site content is the same - the faster uses root to access database one of the sites is not released yet, so it uses IP Address to access the site instead of domain name the site that is using IP address is faster (lot faster) the site that is using domain name is slower do you know why is this happening what could be the reason?

    Read the article

  • Calculate value from two field in third field

    - by terence6
    I'm trying to create a query, that will calculate sum of products on invoice. I have 3 tables : Product (with product's price) Invoice (with invoice id) Products on invoice (with invoice id, product id and number of particular products) So in my query I take invoice_id (from invoice), price (from product),number of products sold and invoice_id (from products on invoice) and calculate their product in fourth column. I know I sohuld use 'Totals' but how to achieve that ? Model:

    Read the article

  • many-to-many mapping in NHibernate

    - by Chris Stewart
    I'm looking to create a many to many relationship using NHibernate. I'm not sure how to map these in the XML files. I have not created the classes yet, but they will just be basic POCOs. Tables Person personId name Competency competencyId title Person_x_Competency personId competencyId Would I essentially create a List in each POCO for the other class? Then map those somehow using the NHibernate configuration files?

    Read the article

  • Proper html markup of table tags?

    - by Gazow
    kind of a silly question, but ive been seeing things such as tbody and thead/tfood tags in other peoples tables are these required even if they're empty for good markup? or can i just leave them out? thanks

    Read the article

< Previous Page | 177 178 179 180 181 182 183 184 185 186 187 188  | Next Page >