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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T-SQL stored procs orders of magnitude faster than LINQ

According to answers I've seen on stackoverflow, stored procedures (and to a lesser extent db functions) tend to perform better vs. LINQ + ORM frameworks (e.g. Entity Framework). I want to determine ...
0
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2answers
142 views

Suggestions for search methodology requested

I am throwing this question out to the 'greater creativity' for some suggestions on search methodology that might solve this problem. I have come up with a somewhat contrived example to attempt to ...
55
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6answers
3k views

Why the Select is before the From in a SQL Query? [closed]

This is something that bothered me a lot at school. 5 years ago, when I learned SQL, I always wondered why we specify first the fields we want and then where we want them from. According to my idea, ...
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1answer
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Automatically adding data from JSON to SQL

I'm really new to this sort of stuff; my background is in C# mainly. Could anyone point me in the right direction? I need to set a script to automatically parse some JSON into an SQL database ...
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2answers
401 views

Programming certificates [duplicate]

Possible Duplicate: Are certifications worth it? I'd be glad to hear your opinions on which programming certificates are the most widely recongnized in the industry and how useful are they ...
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votes
2answers
345 views

two approaches to database modeling - which one to use when

recently I have noticed a new approach to data modeling vs what I have used so far. This seems to be a way to address modeling of an entity that has a very large set of fields and quite often many of ...
2
votes
5answers
761 views

Worst practices in developing database applications [closed]

In constrast to http://programmers.stackexchange.com/questions/123591/database-design-good-practices I wanted to ask: What are the top worst practises you encountered when having to work with other ...
3
votes
2answers
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Bill of materials database design in EF codefirst?

I'm having trouble generating a proper database design for bill of materials in EF Code-first I just need a general structure then ill add additional fields So i need to have a Product that is ...
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votes
1answer
12k views

Entity Framework vs. Linq to SQL? [closed]

I'm a little bit confused about these two terms "Linq to SQL" and "Entity Framework". I have the general idea that both of them somehow allow you to refer to database tables as .net objects or ...
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6answers
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SQL Triggers and when or when not to use them.

When I was originally learning about SQL I was always told, only use triggers if you really need to and opt to use stored procedures instead if possible. Now unfortunately at the time (a good few ...
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6answers
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Interacting With Data Using Multiple Databases/Servers

All of the projects that I've had to deal with so far have only required a single database on a single server. I'm interested in learning more about how projects that need to scale move to multiple ...
0
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3answers
704 views

What is likely to be the bottleneck between the SQL Server, IIS and .net when receiving json as text from the DB?

I have spent the best part of a month working on the jQuery Calendar plugin. The setup is such that all the calendar entries are stored in a table inside SQL Server and im using a single "Select As" ...
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2answers
390 views

What are some useful resources for learning tuple calculus?

I've been trying to go over my tuple calculus over and over again. What's worse is that my professor and tutors are not much help during their hours. Does anyone know a good place to learn about ...
2
votes
2answers
209 views

Are there standard strategies for defining job flow and dependencies?

I'm working on a project that involves the chaining of separate jobs into a single master job, though there may be parallel paths in the chain leading up to the final output. Job and chain details ...
142
votes
19answers
44k views

Why is naming a table's Primary Key column “Id” considered bad practice? [closed]

My t-sql teacher told us that naming our PK column "Id" is considered bad practice without any further explanations. Why is naming a table PK column "Id" is considered bad practice?
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votes
2answers
3k views

Algorithm for formating SQL code

I need a tool (for in house usage) that will format SQL code (SQL Server/MySQL). There are various 3rd party tools and online web sites that do it but no exactly how I need it. So I want to write my ...
4
votes
2answers
183 views

When and how much should we validate input when working with (C)AP storage?

Herein, we consider a server-client architecture. Suppose we keep the details flexible, but there's more than one layer of servers supporting our hypothetical service. The general question is "When ...
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9answers
5k views

Whether to put the business logic in Stored Procedure or Not?

There is always a debate over the topic - "Whether to put the business logic in Stored Procedure or Not?". If we decide not to use the ORM Tool and not to put the Business Logic in Stored Procedure ...
4
votes
2answers
155 views

What is the equivalent of functions and methods in SQL?

In language like C or Java, there are things like functions/methods to modularize and abstract stuff. What is there in SQL, specifically for Oracle? I've seen people talking about using views to ...
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2answers
217 views

Storing stop/start points in a database

Let's say I am storing start and stop points per user into a database table. For example... let's say in a chat system, a user only needs to see lines 24-293, and 500-512. (Let's say he logged off ...
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votes
3answers
3k views

How to reach to the advanced level in SQL? [closed]

I think I have a good grasp of SQL and the most features it has, but sometimes when I've done some more advanced Reporting Services a fellow developer has helped me with some stuff and when I open ...
3
votes
3answers
1k views

Why put SQL statement in a variable before using mysql_query()?

I'm been working with PHP on and off for a bit now, and I've seen plenty of code both ways: $sql = "SELECT …"; mysql_query($sql); vs mysql_query("SELECT…"); Is there a reason for separating the ...
56
votes
6answers
3k views

Is this a ridiculous way to structure a DB schema, or am I completely missing something?

I have done a fair bit of work with relational databases, and think I understand the basic concepts of good schema design pretty well. I recently was tasked with taking over a project where the DB was ...
2
votes
5answers
267 views

For user defined data, is it better to use a table of tables or dynamically created tables?

In an application that allows users to define their own tables and columns (details of that are not the focus of this question, but imagine a tool that lets users create their own forms and ...
4
votes
8answers
2k views

Are Bools/Bits Faster Than Integers

As the title suggests I'm wondering whether bools or bits are faster than using integers (1 and 0)? Specifically I thinking about their speed in CASE statements, even more specifically in T-SQL ...
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4answers
586 views

What are the options when Sql generated by ORM needs tuning?

I am starting working on a web project using django. While researching whether to use Sqlalchemy or raw sql when django orm is not sufficient which is also a question I asked here Raw Sql vs ...
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1answer
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Raw Sql vs SqlAlchemy when Django ORM is not enough

In a django project, if a situation comes that Django ORM is not able to execute some complex queries then there are 2 options: Use Raw Sql queries Use SqlAlchemy I want to know if there are ...
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7answers
719 views

To Domain or not to Domain

The SQL92 and SQL99 standards define CREATE DOMAIN DDL constructs. Not all databases support this, or have a different name for it (SQL Server has User Defined Types, for example). These allow one to ...
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2answers
2k views

Does F# offer anything particularly useful for database-driven web development?

My organization finally upgraded to MS Visual Studio 2010 this year. One of the big new features that Visual Studio 2010 offers is the F# programming language. I understand that F# offers a ...
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votes
5answers
4k views

Best practices for generating new identifiers for persistent objects?

In a typical scenario, an object that needs to be persisted in the database will be created in application code without an identifier, and later saved to a table in the database. Some database ...
7
votes
2answers
6k views

Why NoSQL over SQL? [duplicate]

Possible Duplicate: When would someone use MongoDB (or similar) over traditional RDMS? How well the SQL and NoSQL go head-to-head. I read somewhere that SQL databases are not well for data ...
3
votes
4answers
1k views

Other things to learn for becoming a Database Admin/Developer?

Obviously i'll have to make some sort of choice at what DB i choose to go with (MS-SQL/MYSQL/etc) but this question isn't about that. The question mainly is what other languages/tools would be ...
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5answers
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Developing a simple web-application?

I decided to do a mini-project by myself to help me understand a bit more about developing web applications before starting the new university semester. Using the Java SE and JEE/J2EE platforms. I ...
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3answers
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Managing SQL Stored Procedures' Version

I am working with a team of 5 persons. We are using SQL Server as our database. Since long time I want to store the Stored Procedures in SVN so that the versions can be maintained. Is there any tool ...
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4answers
872 views

Multiple Joins or Simple Readable Database Calls

Curious how other developers feel about this. I come across some pretty nasty sql joins, as we all do I'm sure. I would prefer making more database calls for the sake of readability and simplicity ...
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4answers
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What has been your experience with SQL CLR for complex business logic?

So I thought I had a perfect use-case for a CLR SQL Procedure. I've search the Net for perhaps a similar example where data is retrieved, records added and updated. I have not looked at a SQL CLR ...
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3answers
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XML vs SQL for small projects?

I'm working on a small project which will only have one user at a time since it's a local application (developed in WPF and C#). To store data I was thinking of using an XML file but I'm wondering if ...
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1answer
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Size of database a factor for Hibernate vs JDBC?

Do you know if the size of the database (number of tables used) is a factor when choosing between Hibernate and JDBC? Why or why not? In my particular case, I am evaluating Hibernate and JDBC for ...
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5answers
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What good reasons are there to capitalise SQL keywords?

There seem to be a lot of developers who write their SQL by capitalising the keywords: SELECT column FROM table INNER JOIN table ON condition WHERE condition GROUP BY clause HAVING ...
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votes
2answers
887 views

SQL Query helper/builder? [closed]

We have a flex based front end, that talks via JDBC to some databases. Part of the GUI has some forms that let the users construct Queries in SQL to pull back records from the database. However, we ...
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votes
14answers
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Is SQL important if I know ORM frameworks well? [closed]

I don't have any serious experience in SQL and I even hate to write SQL instead of LINQ. I am happy enough with ORMs. From the employers and sector view point, is it important to know SQL? Do I have ...
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1answer
1k views

How to begin writing a relational SQL database [closed]

I was wondering about how databases like MySQL and SQLite are developed to run as quickly and as well as they do. I'm looking for answers to questions like: How is SQL token-ized? Do you build an ...
4
votes
6answers
1k views

How can I improve upon this “pattern”?

I have a series of method calls that all share similar qualities. The basic layout is public void CallDataBase() { Utility sqlHelper = new Utility(); StringBuilder query = new ...
4
votes
5answers
3k views

SSIS: How long does it usually take to bring a new hire up to speed? [closed]

I’m a self-taught SQL developer that has worked for small to mid-sized companies. Most of my experience has been writing SQL statements for reporting, data scrubs, and never in a formalized IT ...
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2answers
1k views

Database for storing books by grouping, their pages, and the table of contents

I'm looking for a better way to deal with the design I have here, I'm not confident it's really suitable. To give this some context, lets say we have a bunch of groups, one group could be "SQL", and ...
12
votes
3answers
752 views

Is reliance on parametrized queries the only way to protect against SQL injection?

All I have seen on SQL injection attacks seems to suggest that parametrized queries, particularly ones in stored procedures, are the only way to protect against such attacks. While I was working (back ...
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vote
2answers
828 views

SQL injection attacks, how do I test and secure coldfusion queries?

I'm running Coldfusion 8 and SQL server 2008. I've been building serveral forms that insert data into the database from external users, we have a custom built security module built by the guy who ...
7
votes
1answer
962 views

How to document an algorithm properly with sample data?

I am wondering what should an algorithm documentation contain? Can't locate a proper guideline to follow. I have in mind to include summary of the algorithm description of the algorithm flowcharts ...
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5answers
2k views

Why is filesystem preferred for logs instead of RDBMS?

Question should be clear from its title. For example Apache saves its access and error logs in files instead of RDBMS no matter on how large or small scale it is being utilized. For RDMS we just have ...
3
votes
1answer
314 views

Equality between arity and degree concepts in relational theory

I've been reading the book "SQL and Relational Theory: How to Write Accurate SQL Code" by C. J. Date. I have no formal background in CS, much less relational theory. Combined with the fact English is ...