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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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• SQL Server double to decimal read problem

  - by Lalit

  Hi, from front end application I am sending the value as 0.15 to database via a stored procedure, but it gets stored as 0 value. Why? please guide. I am using C# + ASP.NET + SQL Server 2008

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• round a number in SQL

  - by LIX

  I have a number and I use ROUND() function in SQL : SELECT ROUND(1.81999,2,1) I want the result 1.82, not 1.81. I don't know where my mistake is.

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• Transposing from rows into columns

  - by Deques

  Hey, I have a table like this Name State Amount ------------------------------ Pump 1 Present 339 Pump 1 Optimized 88 Which I want to transpose something like this Pump 1 Present 339 Optimized 88 How can I do this with MS SQL 2000? I tried to search for a solution, but couldn't find the most fitting solution :(

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• SQL Query to delete records older than two years

  - by Garrett Dumas

  I need to clean out a very bloated SQL database by deleting records that are older than two years from a number of tables. What is the most efficient way of doing this? Thanks in advance.

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• Which Tool can generate UML by SQL?

  - by Haiperlink

  I'm searching a tool for generating UML-Diagrams by the import of SQL-Syntax-Files. I need it for personal usage. Best if it's free or if there is a free trial license available.

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• Updating a sql server table with data from another table

  - by David G

  I have two basic SQL Server tables: Customer (ID [pk], AddressLine1, AddressLine2, AddressCity, AddressDistrict, AddressPostalCode) CustomerAddress(ID [pk], CustomerID [fk], Line1, Line2, City, District, PostalCode) CustomerAddress contains multiple addresses for the Customer record. For each Customer record I want to merge the most recent CustomerAddress record where most recent is determined by the highest CustomerAddress ID value. I've currently got the following: UPDATE Customer SET AddressLine1 = CustomerAddress.Line1, AddressPostalCode = CustomerAddress.PostalCode FROM Customer, CustomerAddress WHERE Customer.ID = CustomerAddress.CustomerID which works but how can I ensure that the most recent (highest ID) CustomerAddress record is selected to update the Customer table?

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• How should I access to SQL Server DB?

  - by worlds-apart89

  I have been reading that direct access to a SQL Server database over the Internet is insecure, so I am wondering what intermediary I can and should use between the client and the server. What are the best practices in terms of security and performance?

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• What IS NDF Files

  - by Nasser Hajloo

  Every SQL Server databases have lots of files MDF Data LDF Log file ... NDF ? I want to know that what is NDF and whats the benefits of it

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• what if system crashes when i type SQL command

  - by user323422

  I have some doubt as follows We are UPDATING a field in SQL and ALTER the row also.After giving the COMMIT command the system is crashed.Wat will happen to the commands given,whether it will UPDATE and ALTER the table r not?

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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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• 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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• Database persistence without an SQL server

  - by James P.

  I'm seeking a solution that would allow persistence without requiring an SQL server to be installed on the host and could be bundled along with a desktop application. Does such a thing exist?

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• continue statement in pl/SQl?

  - by i2ijeya

  I am Using Oracle 9i and I want to use continue statement or its equivalent in PL/SQL. So is there any keyword called "continue" in oracle 9i. If not, please let me know the solution for this.

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• What's wrong with this UPDATE FROM using a case statement?

  - by Blankman

  update p set p.storePrice = CASE WHEN p.costPrice BETWEEN 0.00 AND 1.00 THEN p.costPrice * 1.0 CASE WHEN p.costPrice BETWEEN 0.00 AND 1.00 THEN p.costPrice * 1.0 ELSE p.msrpPrice END FROM product p WHERE p.type = 1 The error says: Msg 156, Level 15, State 1, Line 9 Incorrect syntax near the keyword 'CASE'. I can't seem to see any issue with the sql?

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• Generating SQL for website

  - by Ethan

  I am working on a webapplication How can i create SQL for the following Database Information User information Username - String Password - String Admin or Client - boolean Last login – Date/Time LogItem typeLogItem – String (Page name?) hitCount – int View PageURL UserID Transaction User – String DateTimeStamp SKU – int Purchase-boolean TransactionID-int Inventory information Sku number - int Item description - String Price to customer - double Count - in

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• What is the result of this SQL query?

  - by Martin

  I'm working on a mock exam paper at the moment, however I have no set of correct answers and I'm not sure what the correct answer of this SQL query is. Given a table: foo, bar a , 1 b , 3 a , 2 c , 1 and the query: SELECT foo, sum(bar) FROM table GROUP BY foo The two ways I can see this going are either: a 3 a 3 b 3 c 1 or a 3 b 3 c 1 Thanks.

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• SQL Injection in a Non-Web Application.

  - by The Rook

  Does someone know of a good example of a SQL Injection vulnerability that isn't in a web application? I am looking for a real vulnerability, not speculation. The following picture is an example of a speculated attack.

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• SQL Select -> product -> comments -> user

  - by user1492716

  thanks for yout time helping on this ;) I'm new to SQL and wish to solve somethign in just one query and i dont know how to do it.- Basically I've a table of products, a table of users and a table of comments, linked by products.id - comments.pid and user.id - comments.uid , i wish to know what is the best practice to create just 1 query and get all products with child comments, including username.

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• Recursive SQL, have the last three values increased?

  - by Mike

  Hi, I have a table that looks like this: ---------------------- | DateTime | Value | ---------------------- | 2010-01-01 | 26 | | 2010-02-01 | 24 | | 2010-03-01 | 23 | | 2010-04-01 | 28 | | 2010-05-01 | 30 | I need to find if the last three consecutive months have increased in value. How can I get SQL to check whether the value for each has increased? If anyone can give me any pointers for solving this problem it would be greatly appreciated! Thanks

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• Sample Employe MS SQL Database with data (surname, name, age, address)

  - by Tom

  Hi I need some sample MS SQL Employee database with data such as id, surname, name, age, adress etc. It must be quite big, I search with google, but I don't find any good sample. Can any body help ?

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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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• 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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• What is the sql statement for searching in text using MS SQL Server 2008?

  - by SzamDev

  Hi If I have text sotred in my DB, for example: "There are 2 books on the table". Maybe the user wants to search for "books" or the user wants to search in this text for any thing. What is the best SQL Statement to do that?. Thanks in advance.

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• is it possible to select EXISTS directly as a bit?

  - by jcollum

  I was wondering if it's possible to do something like this (which doesn't work): select cast( (exists(select * from theTable where theColumn like 'theValue%') as bit) Seems like it should be doable, but lots of things that should work in SQL don't ;) I've seen workarounds for this (SELECT 1 where... Exists...) but it seems like I should be able to just cast the result of the exists function as a bit and be done with it.

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