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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3
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1answer
286 views

Separation of concerns between repository and service in DDD with complex entities

This probably seems as an example of opinion-based question, but I'm actually looking for rationale on how to decide correctly, I believe there is a correct solution that can be backed by solid ...
1
vote
1answer
39 views

Custom Domain or Attribute Reference Table or Both?

I'm designing my first real database and I'm weighing the pros and cons of how to enforce uniformity in my data. My first option is to create a custom domain and program my UI to only allow certain ...
-1
votes
1answer
353 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 ...
3
votes
0answers
558 views

Clustering Strings on the basis of Common Substrings

I have around 10000+ strings and have to identify and group all the strings which looks similar(I base the similarity on the number of common words between any two give strings). The more number of ...
2
votes
0answers
58 views

The best way to convert Dynamic SQL to C#/Linq while joining multiple tables

I am trying to find the best way to convert the following dynamic SQL snippet to C# / Linq. The question is complicated by the use of multiple tables within the dynamic SQL. I've examined the ...
2
votes
0answers
126 views

Serialized values or separate table, which is more efficient?

I have a Rails model email_condition_string with a word column in it. Now I have another model called request_creation_email_config with the following columns admin_filter_group:references ...
2
votes
0answers
227 views

Match buyers and sellers based on date ranges and quantity of shares

NOTE: This is in reference to the question I asked on Stack Overflow but was told to post this here I'm building a trading application that matches buyers/sellers that own subscription. Subscriptions ...
1
vote
0answers
156 views

Preserving Pre-formatted Multi-Line Strings in Node.js Scripts

There is a lot I don't like about PHP, but one thing I love is multi-line strings: $query = <<<EOT select field1 ,field2 ,field3 from tableName where field1 = 123 EOT; ...
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vote
0answers
203 views

What is the “correct” way to store functions in a database?

Note: Yes, I know that storing functions in databases should be punishable by law. We are developing a financial web application using PostgreSQL, Sinatra and AngularJS. As you may have guessed, a ...
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0answers
80 views

An algorithm to implement SQL's ORDER BY with TOP/LIMIT or OFFSET/FETCH

Is there a general algorithm to implement SQL's ORDER BY with OFFSET/LIMIT more efficiently than sorting all the records? The algorithm for a simple TOP x is easy enough. It takes one full pass ...
1
vote
0answers
55 views

Track time spent on site

We are going to track user engagement (i.e. time spent on site, most viewed part/page of the system, etc). I don't see Google Analytics / MixPanel being able to do this, since we have to analyze ...
1
vote
0answers
193 views

What database structure is suitable for tracking File audits?

I need to track permissions and access requests to a file server in a database. I'm given the full path of the folder and am considering parsing the path (splitting on the "/" character) and creating ...
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votes
0answers
57 views

How to deal with requests that don't conform to the existing data structure?

The system I'm working on has a list of assets that belong to different customers of the company. This data is saved on an SQL database. Removing irrelevant data, let's say the table is like this: ...
0
votes
0answers
65 views

embedding LEFT OUTER JOIN within INNER JOIN

I am having some problems with one of the question's answered in the book "SQL FOR MERE MORTALS". Here is the problem statement Here is the Database Structure Here is the answer which I am ...
0
votes
0answers
198 views

Javascript and SQL Lite (multi browser offline SQL/database query)

I'm in the elections division of my county and am trying to simplify a voter lookup method for our poll judges during election time. Currently we are using a clunky heavy application that the judges ...
0
votes
0answers
59 views

Using a single table for identity and metadata

I'm in the early design phase of a project to provide an e-commerce platform that will require several entities to be modelled, products, customers, orders, CMS pages, etc. They will all have a few ...
0
votes
0answers
114 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 ...
-3
votes
0answers
39 views

set() is the value in a key:value pair?

I'm working on dictionary comprehension for a database so that I can save various database tables as nested dictionaries for easier data manipulation. SQLAlchemy Core has a good tutorial with an ...