Structured Query Language (SQL) is a language for managing data in relational database management systems. This tag is for general SQL programming questions; it is not for Microsoft SQL Server (for this, use the sql-server tag), nor does it refer to specific dialects of SQL on its own.

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22
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5answers
894 views

Multiple database accesses or one massive access?

What is a better approach when it comes to performance and optimal resource utilization: accessing a database multiple times through AJAX to only get the exact information needed when it is needed, or ...
0
votes
1answer
641 views

TFS SQL Deployment Data Script

We are using TFS and SQL Server 2005 (looking to upgrade to SQL Server 2012 if that makes a difference). We store our database schema in a Visual Studio Database project (VS 2010). When code is ...
4
votes
3answers
701 views

SQL RDBMS : one query or multiple calls

After looking around the internet, I decided to create DAOs that returned objects (POJOs) to the calling business logic function/method. For example: a Customer object with a Address reference would ...
0
votes
1answer
232 views

Concurrency checking with Last Change Time

I have an app with the following three tables Email (emailNumber, Address) Recipients (reportNumber, emailNumber, lastChangeTime, status) Report (reportNumber, reportName) I have a C# application ...
14
votes
2answers
4k views

self referencing tables, good or bad?

Representing geographical locations within an application, the design of the underlying data model suggests two clear options (or maybe more?). One table with a self referencing parent_id column uk - ...
-1
votes
1answer
248 views

Address search from large text file

Basically I want to develop a Address lookup(part of my project) using C# (and I can use SQL if necessary). I have a very large text file which have all the UK address and postcodes. Addresses needs ...
4
votes
2answers
457 views

Best practice to represent SQL in program source code

Where SQL statements are executed from a program, what is the best practice to store the statement text? Most often it is in a read only string, in the source file it is executed in. I think a ...
1
vote
5answers
1k views

Is it Considered Good SQL practice to use GUID to link multiple tables to same Id field?

I want to link several tables to a many-to-many(m2m) table. One table would be called location and this table would always be on one side of the m2m table. But I will have a list of several tables ...
1
vote
1answer
253 views

Structure of a correctly implemented JTable with TableModel and Listeners?

I am pretty new to Java and its JTables and this is where I am struggling at the moment. I need to create a GUI which shows me results of a sql query like SELECT * FROM tblPeople WHERE name='Doe'. My ...
-1
votes
1answer
1k views

How to use PostgreSQL on AWS - Ubuntu 11.10 [closed]

I'm extremely new to cloud-computing, Linux, and PostgreSQL, so if this is a stupid question, I apologize. I've managed to create an m1.large instance running Ubuntu 11.10, connect via Putty SSH, and ...
0
votes
0answers
110 views

Benchmarking ORM associations

I am trying to benchmark two cases of self referential many to many as described in datamapper associations. Both cases consist of an Item clss, which may require many other items. In both cases, I ...
-1
votes
1answer
464 views

keeping connection open all time in sql

I have developed a Windows application in c# in which multiple users can add some numbers and their name and can view the data entered. The problem that I have is that the sever is on my laptop and ...
0
votes
5answers
319 views

Is comparing an OO compiler to a SQL compiler/optimizer valid?

I'm now doing a lot of SQL development at my new job where as before I was doing Object Oriented desktop app stuff. I keep running across very large scripts (thousands of lines) and wanting to ...
1
vote
3answers
3k views

Storing Attendance Data in database

So i have to store daily attendance of employees of my organisation from my application . The part where I need some help is, the efficient way to store attendance data. After some research and brain ...
100
votes
15answers
11k views

“Never do in code what you can get the SQL server to do well for you” - Is this a recipe for a bad design?

It's an idea I've heard repeated in a handful of places. Some more or less acknowledging that once trying to solve a problem purely in SQL exceeds a certain level of complexity you should indeed be ...
1
vote
1answer
395 views

Established coding standards for pl/pgsql code

I need to standardize coding practices for project that compromises, among others, of pl/pgsql database, that has some amount of nontrivial code. I look for: Code formatting guidelines, ...
5
votes
3answers
568 views

Should we have a database independent SQL like query language in Django?

Note : I know we have Django ORM already that keeps things database independent and converts to the database specific SQL queries. Once things starts getting complicated it is preferred to write raw ...
5
votes
4answers
477 views

Designing a Database Application with OOP

I often develop SQL database applications using Linq, and my methodology is to build model classes to represent each table, and each table that needs inserting or updating gets a Save() method (which ...
3
votes
2answers
461 views

Forced to write Stored Procedures

Can you think of some reasons that the management force the developers to write and call Stored Procedures instead of inline SQL statements directly? Even a very simple CRUD statement, writing a ...
2
votes
3answers
595 views

How To Start Programming [closed]

I have taken a programming course 2 years ago but I haven't worked in programming since then. I recently found a programmer job, but there is no programming team so for me to gain valuable experience ...
7
votes
4answers
2k views

Best C# database communication technique

A few days ago, I read an answer stating that writing queries within your c# code are long gone. I'm not sure what the specific person meant with the comment but, it got me thinking. At the company ...
0
votes
2answers
185 views

Visual C++, CMap object save to blob column

I have a MFC CMap object, each object stores 160K~ entries of long data. I need to store it on Oracle SQL. We decided to save it as a blob. Since we do not want to make additional table, we also ...
-2
votes
1answer
1k views

How to check for null in most sql's - “column is null” or “column = null” [closed]

I'm not sure of the right syntax to use. Is it select * from tlb where flag is NULL or select * from tlb where flag = NULL Is the answer the same for oracle, sqlserver and Postgres? Note: I ...
3
votes
1answer
757 views

Calling MSSQL stored procedure from Zend Controller ? Any other approaches?

MSSQL and DB, Zend as PHP Framework, I am using this way to call SP with I/P Parameters and to get O/p Parameters. It seems I am writing SQL code in PHP. Any other good approaches? $str1 = ...
1
vote
1answer
715 views

How can I implement a database TableView like thing in C++?

How can I implement a TableView like thing in C++? I want to emulating a tiny relation database like thing in C++. I have data tables, and I want to transform it somehow, so I need a TableView like ...
1
vote
5answers
4k views

Externalising SQL Queries in Java

What are the advantages and disadvantages of externalising SQL queries in Java (or similar general-purpose object-oriented programming language. Externalizing means storing all SQL in a separate ...
4
votes
2answers
316 views

Proper Data Structure for Commentable Comments

Been struggling with this on an architectural level. I have an object which can be commented on, let's call it a Post. Every post has a unique ID. Now I want to comment on that Post, and I can use ...
11
votes
4answers
870 views

TDD with SQL and data manipulation functions

While I'm a professional programmer, I've never been formally trained in software engineering. As I'm frequently visiting here and SO, I've noticed a trend for writing unit tests whenever possible ...
4
votes
3answers
606 views

Appropriate use of SQL CLR

We have some back end processes that runs* on our sql server (SQL Server), they involve processing claims. This requires both data manipulation (biz logic) and data read/write to tables. The biz ...
1
vote
2answers
578 views

Registration: Email hash and verifying only one account per email

I'm using a registration function that hashes the email in PBKDF2 with a random and unique Salt each time. The hashes email and his salt are saved in the DB. No problem with that. The problem is that ...
2
votes
1answer
594 views

Best way to remove list items from an existing record

Ok more of a conceptual question here: Say I have an existing record of type Meeting. When I go to edit the meeting I have a listbox with all current meeting participants, and one with all employees. ...
6
votes
3answers
5k views

Why is SQL's BETWEEN inclusive?

Semi-open intervals ([a,b), where xbelongs to the interval iff a <= x < b) are pretty common on programming, as they have many convenient properties. Can anyone offer a rationale that explains ...
6
votes
2answers
1k views

Best method to implement a filtered search

I would like to ask you, your opinion when it comes to implement a filtered search form. Let's imagine the following case: 1 Big table with lots of columns It might be important to say that this SQL ...
3
votes
3answers
390 views

Why should I add CHECK CONSTRAINT?

Following is a table creating script created by Entity Framework using the model shown in http://codereview.stackexchange.com/questions/14077/is-it-proper-tpt-inheritance. In this script, there are ...
3
votes
2answers
216 views

Having 2 Initialize Paragraphs in 1 COBOL program

I am designing a COBOL program that does 2 things. 1 reads specific rows from a table, and inserts a new row based on the original. 2 reads different rows from the same table, and updates those rows. ...
1
vote
2answers
110 views

Cataloging events, projects and tasks: Is SQL appropriate?

I have this idea for a database: it would hold everything I "need to remember", and allow future coding projects to access the information. These future projects include a day-planner and historical ...
1
vote
3answers
386 views

Is an API in C++ a better alternative to computing directly in SQL?

I need to perform large amounts of computations on data storerd in a busy Microsoft SQL server. Would it be faster if I retrieve the data from the server, perform the computations locally in C++, and ...
12
votes
3answers
20k views

Why do we need to put N before strings in Microsoft SQL Server?

I'm learning T-SQL. From the examples I've seen, to insert text in a varchar() cell, I can write just the string to insert, but for nvarchar() cells, every example prefix the strings with the letter ...
2
votes
2answers
178 views

Better way to search for text in two columns

Here is the scenario. I am making a custom blogging software for my site. I am implementing a search feature. It's not very sophisticated - basically it just takes the search phrase entered and runs ...
2
votes
8answers
5k views

Is executing SQL through a WebService a really bad idea?

Typically when creating a simple tool or something that has to use a database, I go through the fairly long process of first creating a webservice that connects to a database then creating methods on ...
0
votes
3answers
353 views

Does connection pooling work fine to execute 60 DB queries to load a page?

We use Linq2Sql in an ASP.NET application. Unfortunately the eager-loading in Linq2Sql isn't as powerful as in Entity Framework, so a lot of the data has to be lazy loaded as needed. Taking ...
4
votes
1answer
385 views

What is Rainbow (not the CMS)

I was reading this excellent blog article regarding speeding up the badge page and in the last comment the author waffles (a.k.a Sam Saffron) mentions these tools: dapper and a bunch of custom ...
0
votes
1answer
931 views

Database Driven Web Application, C# Front-End and F# Back-End meaning

Hi I am an intern working with ASP.NET. My current task is to make a website which will incorporate some jquery viewing features. This project seems to me will be primarily dealing with reading data ...
0
votes
3answers
1k views

Is this overkill? Using MDX queries and cubes instead of SQL stored procedures

I am new to Microsoft's SQL Server Analysis Services Cubes and MDX queries. Where I work we have a daily sales table in SQL Server 2005 that already contains an aggregate of sale information per ...
2
votes
1answer
488 views

Which would be a better way to load data via ajax

I am using google maps and returning html/lat/long from my MySQL database Currently A user picks a business category e.g; "Video Production". an ajax call is sent to a CodeIgniter controller the ...
1
vote
2answers
456 views

SQL language drawbacks, The Third Manifesto

Sometime ago I read about SQL language drawbacks (the basic language specification, not vendor specific), and one of the drawbacks was that the language does not allow to create a set of tuples that ...
5
votes
5answers
343 views

Alternatives for comparing data from different databases

I have two huge tables on separate databases. One of them has the information of all the SMS that passed through the company's servers while the other one has the information of the actual billing of ...
0
votes
2answers
296 views

Will TSQL become useless because of new ORMs? [closed]

By introducing LINQ to SQL, I found myself and my .NET developer colleagues gradually moving from TSQL to C# to create queries on the database. Entity Framework made that shift almost permanent. Now ...
2
votes
5answers
3k views

SQL Strings vs. Conditional SQL Statements

Is there an advantage to piecemealing sql strings together vs conditional sql statements in SQL Server itself? I have only about 10 months of SQL experience, so I could be speaking out of pure ...
1
vote
1answer
4k views

how to compare two large sets of data using PL/SQL?

I have two different tables in two separate databases with around 1.5 million records each. (BTW: im working on oracle databases) The objective is to check if every record present in table A is ...