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  • Update a column based on a field from another table

    - by Sergio
    Hi: I'd like to update values in one table based on corresponding values from other tables. Say you want to update prices of pieces provided by one specific manufacturer whose name is in the table Manufacturers with the Pieces table containing only the id of the manufacturer. I've seen several solutions for MySQL here and for MS SQL Server here but none of them seems to work in SQLite. Any suggestion?

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  • How many objects can LINQ used to create per second ?

    - by MemoryLeak
    I used Linq to insert objects into database.But if i used threads to simultanously create 20 object within 1 second, then system will fail to add 20 objects into database. And I found it is not because of the sql server 's limit. so the only possible is Linq, any one have idea ? How can I create 20 records or more in 1 second within 1 second ?

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  • Repository Pattern: SaveOrUpdate() in Entity Framework and L2S

    - by JMSA
    These web articles uses separate Save() and Update() methods in the repository pattern. I am using repository pattern. How can I write a SaveOrUpdate() method in Entity Framework with the help of ObjectContext and in Linq-To-SQL with the help of DataContext? That is, how can I write a single method that shall do both save and update job?

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  • Where binary in SQL

    - by fire
    I have an SQL statement: SELECT * FROM customers WHERE BINARY login='xxx' AND password='yyyy' There are no blob/binary fields in the table, do I need the BINARY after the WHERE what else does it do?

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  • how to generate primary key values while inserting data into table through pl/sql stored procedure

    - by thulasi policherla
    hi friends, I am trying to insert data into particular table through pl/sql stored procedure,my requirement is while inserting i should generate PRIMARY KEY values for particular column and also i should return that PRIMARY KEY value to output and one more thing is that for another column i should validate my string such that it should contain only characters not integers. please help me in writing code for the above requirement Thanks and regards thulasi policherla

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  • How to calculate

    - by Bob
    Hi, I hv a table like this :- Item Qty Price A Price B abc 5 36.00 0 qwe 8 0 48.00 zxc 6 12.00 0 poi 4 10.00 0 lkj 9 12.00 0 mnb 3 0 14.00 vfr 7 0 6.00 How can I sum the value using SQL ie. if Price A is zero, it will pick Price B. The expected results will be as follows :- Item Value abc 180.00 qwe 384.00 zxc 72.00 poi 40.00 lkj 36.00 mnb 42.00 vfr 42.00

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  • Oracle multiset, collection and records

    - by Atul
    Can anybody Explain me why records are required. Can't we perform the same operation in pl/sql using loop and all. Also when multiset, records query can be used i.e. in which type of situation and which one will be the preference.

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  • What is the best approach using JDBC for parameterizing an IN clause?

    - by Uri
    Say that I have a query of the form SELECT * FROM MYTABLE WHERE MYCOL in (?) And I want to parameterize the arguments to in. Is there a straightforward way to do this in Java with JDBC, in a way that could work on multiple databases without modifying the SQL itself? The closest question I've found had to do with C#, I'm wondering if there is something different for Java/JDBC.

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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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  • Adding to the schema of a subscribing database.

    - by NTDLS
    Transactional Replication on SQL Server 2005 Enterprise x64 (SP3). I need to add check constraints to a databases that is the target for a replication, but I cannot add the check constraints to the publishing database. The Problem is that the replication process keeps removing my constraints. How do I prevent this?

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  • multiple search fields

    - by user234194
    What will be the best approach if I have search fields for 20 or more and any combination should be valid. Is there any special way to do it in openJPA or native SQL is better. Any idea would be helpful.Thanks.

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  • multiple search fields

    - by user234194
    What will be the best approach if I have search fields for 20 or more and any combination should be valid. Is there any special way to do it in openJPA or native SQL is better. Any idea would be helpful.Thanks.

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  • IN 'mytextfile.txt' syntax - access

    - by I__
    i would like to use this syntax to update a table in access based on data from a txtfile. fenton in his comments on this answer: http://stackoverflow.com/questions/2992168/read-text-file-line-by-line-and-insert-update-values-in-table/2992337#2992337 said that this is possible and i would like to see the exact syntax please

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  • MYSQL Select statment Order By with Group By

    - by mouthpiec
    I have the following simple SQL statment SELECT id, name, value_name, value_id FROM table GROUP BY id ORDER BY value_id DESC when grouping I would like to get the value_name and value_id of the tuple where the value_id is the biggest. The way it is i am getting the smallest value. For example 1, name1, valuename, 3 (where i know that there is a value_id of 5) Can you please help?

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  • MySQL join problem

    - by snaken
    Whats wrong with this SQL? It should return results but returns nothing SELECT `pid` FROM `products` LEFT JOIN `prods_to_features` ON (`ptf_pid` = `pid`) WHERE (`ptf_id` = '66' OR `ptf_id` = '67') AND (`ptf_id` = '76') Is it not possible to have the 2nd where clause for the table that has been used in the left join?

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