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  • Efficient SQL to count an occurrence in the latest X rows

    - by pulegium
    For example I have: create table a (i int); Assume there are 10k rows. I want to count 0's in the last 20 rows. Something like: select count(*) from (select i from a limit 20) where i = 0; Is that possible to make it more efficient? Like a single SQL statement or something? PS. DB is SQLite3 if that matters at all...

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  • Update Multiple records in SQL Server

    - by Yongwei Xing
    Hi all Here is my situation: I use the SqlCommond to update some records in the SQL Server in a ASP.NET web site. Users can choose which records they want to update. Sometimes they may choose 40 or 60 records to update at a time.Is there any good way to do it? I do not want to do like it foreach(string ID in List) { Update here } Best Regards,

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  • Replace table of one database with other

    - by coure06
    I have 2 databases with same tables. DBProduction and DBLocal both have testTable. How can i replace testTable of DBProduction with of DBLocal? There are some new rows inserted and some updated rows in testTable of DBLocal. Using SQL Server 2008

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  • LINQ-to-SQL eagerly load entire object graph

    - by Paddy
    I have a need to load an entire LINQ-to-SQL object graph from a certain point downwards, loading all child collections and the objects within them etc. This is going to be used to dump out the object structure and data to XML. Is there a way to do this without generating a large hard coded set of DataLoadOptions to 'shape' my data?

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  • The right way to write "ID" in columns in SQL

    - by radbyx
    My first question in here. I like the site so much :) I've a SQL table called Product. In that table I want to make a column for the ID of the product, and I really like to now the right way of write ID because I make alot of ID columns in the long run. So is it: "ID" or "Id" ? And also a foreign key in another table, is that called ProductID or ProductId? Thx guys.

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  • adding month to EndDate as constraint in Oracle SQL

    - by user2900611
    I've a question regarding Oracle database SQL. my employee each have a project, the end date of the project depends on the no of months that was given to them base on PTerm. Am i right to do it this way? CREATE TABLE PROJECT ( P_ID VARCHAR ( 20 ) NOT NULL, PNAME VARCHAR ( 100 ) NOT NULL, PTERM VARCHAR ( 20 ), PSTARTDATE DATE, PENDDATE DATE, CONSTRAINT PROJECT_PKEY PRIMARY KEY ( P_ID ), CONSTRAINT PROJECT_PTERM CHECK ( PTERM IN ('1 MONTH', '2 MONTH', '3 MONTH') ), CONSTRAINT PROJECT_ENDDATE CHECK ( PENDDATE = (PSTARTDATE + PTERM) ) );

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  • SQL SERVER 2005 Self Joins output

    - by user301751
    HI I am looking for some help I just can't seem to get my head how self joins work. I have this sql code select Persno'Name',convert(char(20), A_Date , 13)'Logins',acode from atrail as LOGIN where acode = 'LOGIN' OR acode = 'LOGOUT' order by a_date desc Which produces a list of User names and when the have logged in and out. What I am trying to acheive is to get anther column with the LOGOUT date next to the date they logged in date so that it is easyer to see when they logged in and out. Thanks Andy

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  • Sql joining a table

    - by benjamin button
    I have a question regarding the Sql Joins. whenever we join two different tables on some fields. what will happen exactly inside oracle which will result in the query output. will there be a temporary table created just for presenting the query output.

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  • Problem with SQL query

    - by William
    Here's the query INSERT INTO test_bans( ip, Expiration ) VALUES ( "0.0.0.0", DateAdd( "d", 1, Date( ) ) ) Here's the table creation query CREATE TABLE test_bans ( ID smallint(6) NOT NULL AUTO_INCREMENT, IP text NOT NULL, Expiration DATETIME NOT NULL, PRIMARY KEY (ID) ) TYPE=MyISAM; And here's the error #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')))' at line 1 Please help.

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  • Forward DB requests after a DB move in SQL Server

    - by Nissan Fan
    I've moved database from one SQL Server instance on a machine to another machine completely. Is there any way to forward requests to the new server automatically so it doesn't require client config changes? Keep in mind it's only one DB out of many on the original server so I can't just forward all requests.

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  • Selecting from a Large Table SQL 2005

    - by Eugene
    I have a SQL table it has more than 1000000 rows, and I need to select with the query as you can see below: SELECT DISTINCT TOP (200) COUNT(1) AS COUNT, KEYWORD FROM QUERIES WITH(NOLOCK) WHERE KEYWORD LIKE '%Something%' GROUP BY KEYWORD ORDER BY 'COUNT' DESC Could you please tell me how can I optimize it to speed up the execution process? Thank you for useful answers.

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  • SQL injection attempt on my server

    - by Jan Kuboschek
    I know a little about SQL injections and URL decode, but can someone who's more of an expert than me on this matter take a look at the following string and tell me what exactly it's trying to do? Some kid from Beijing a couple weeks ago tried a number of injections like the one below. %27%20and%20char(124)%2Buser%2Bchar(124)=0%20and%20%27%27=%27

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  • Is this possible with sql?

    - by Andrew
    Is it possible to do something like this: INSERT INTO table(col1, col2) VALUES(something_from_another_table, value); With something_from_another_table being a SQL command? Like, is there something I can do that's equivelant to: INSERT INTO table(col1, col2) VALUES((SELECT value FROM table2 WHERE id = 3), value);

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