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.

learn more… | top users | synonyms

1
vote
2answers
25 views

'first_name' vs 'name_first' for Grouping Similar SQL Columns

When creating a table with similar bits or data such as names. Is it preferred to have the column name prefixed with a common value? Consider a table to store user information. Looking at the columns ...
3
votes
5answers
103 views

Is it unnecessary to learn the kind of data structures and objects inside sql only because we are using another language to access db indirectly?

Suppose we are using java or python to access the database. Then is it considered a wastage of time and unnecessary to learn the kind of data structures and objects being used inside sql? Please ...
-3
votes
0answers
39 views

How to connect user input in HTML with an SQL database? [on hold]

I'm creating an e-commerce site where I need users to log in with a username and password, and also add stuff like credit card information and address. How can I take the user input in HTML and ...
2
votes
2answers
156 views

Is there some rationale behind SQL's lack of closure for what are standard operations in imperative languages?

Is there some historical or practical reason why SQL (or more specifically T-SQL in my case) does not support the closure property in many areas where many other language families like C do? (That is,...
1
vote
1answer
32 views

Dynamic form builder with serialised sql storage

I have a requirement whereby my users will need to be able to build their own forms. Which they can specify different datatypes: Text DateTime Checkboxes All customisable mandatory/optional. I've ...
0
votes
1answer
69 views

What's the best way to popullate a new row in a database?

Is it possible to add a new row to a database using DataSet, because when I created a new dataSet and dragged the table from the database I could see that in the dataSet methods there was one called ...
2
votes
2answers
182 views

Configurable tables in SQL database

I have the following tables in my database: Configuration Table: ====================================== Start_Range | End Range | Config_id 10 | 15 | 1 ============================...
2
votes
2answers
105 views

How To Design Time Slot Based App

I have got a responsibility of designing an app which allocates time slots for doctors booking. The scenario is like, there'll be entry for doctors and their time slot for each days. For E.g. ...
0
votes
1answer
35 views

sql - How do I add child of child when dependent on parent

I'm building a wpf application which interacts with a sql database. I'm confused about adding children of children in my window. For example.. I just created a fishing trip so my fishing trip doesnt ...
0
votes
1answer
160 views

Designing Pricing table (RDBMS agnostic)

I'm designing a pricelist table for my database. It will include Customer, Model, Start_date, End_date, Price, Currency, RRP When I update a new pricelist which is sent every now and then (maybe ...
0
votes
1answer
32 views

User, user Role and user Info, data base design problem

I am creating an application that will manage job interviews and help the employers to choose the job seekers based on a ranking system that's based on some user info. I've created a database that has ...
19
votes
9answers
7k 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 ...
6
votes
2answers
107 views

Seeking benefits of both SQL and binary files in a data storage scheme

I'm looking for some input on how to keep certain benefits of both a binary file and a SQL database in an interesting data storage problem. I have a legacy custom binary file format that is ...
-7
votes
0answers
36 views

TVP or cursor? What is better for performance? [duplicate]

I am populating a cursor with a max of 65 inserts, all for a single input variable for a sp. In terms of performance, should I use a table-valued parameter instead? I use them both, but I just would ...
-1
votes
2answers
62 views

SQL query - split and run parallely?

I have a master table T1 which has 1000 records and a ColRef a key column. There are lots other tables all linked by ColRef. I have a Stored procedure which takes few hours to process. I want to ...
3
votes
1answer
54 views

Creating a service to to run logic / queries and update a table vs. running logic / queries on client refreshes

I'm not sure if this is a thing. I'm sorry about the ambiguous title--I wasn't really sure how to explain it. Basically I have a ASP.NET web page that runs two SQL queries and does some logic to ...
0
votes
1answer
451 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 ...
13
votes
3answers
4k views

Is inline SQL still classed as bad practice now that we have Micro ORMs?

This is a bit of an open ended question but I wanted some opinions, as I grew up in a world where inline SQL scripts were the norm, then we were all made very aware of SQL injection based issues, and ...
2
votes
2answers
46 views

When do I prefer a local DB over serialization for local data storage?

I recently started developing a small calendar application, in which I can add and view several calendar entries, which contain several data like name, date, alarm settings and so on. Those values ...
1
vote
3answers
215 views

How to maintain user relationship when user un-follows another user

I have a table of user relationship which stores who follows whom, the table structure is as follows -id -follower -following when someone follows any other user, I add a record with follower user ...
0
votes
1answer
85 views

How to setup multiple queries with slight differences

I'm writing a page that will show the user statistical data about some of our products. Basically the user can get results between a specific time frame, and also add on other data to lookup by. For ...
-1
votes
2answers
240 views

Registration form with email verification

Can someone point me in the right direction: I need to make a website with a registration form, to create accounts with e-mail verification, to write the forms content in a database table or something ...
-2
votes
1answer
33 views

Get database after sql crash [closed]

One of the hard drive in my office's NT server was crashed two weeks ago. I had installed MS-SQL in c: and the data was stored in d:. The hard crased was c:. Thus I replaced the crashed hard drive ...
3
votes
1answer
102 views

Django Migrations: Binds data to code?

If you have custom code for models (custom validators and custom fields are examples), Django Migrations will import them directly into the migration files. An example: file web/models.py def ...
0
votes
2answers
52 views

Term OR word for specific type of a SQL table

I am looking for a Term/Word for specific type of tables. I have tried to search a lot, but I could not come up with best search terms for this. Tables that hold some master information, such as ...
0
votes
1answer
19 views

Best Azure Solution for Complex Search Index

I need to perform quick searches against a combination of tags while including date ranges: Example: Users who have requested notifications who did not respond to a notification sent at least 3 ...
1
vote
0answers
45 views

SQL - Locating closest value in a set

I have a table that contains the percentiles from a reference data set. CREATE TABLE [Core].[RiskFactor]( [SpecialtyCode] [char](2) NOT NULL, [RiskCategoryId] [int] NOT NULL, [Percentile] [tinyint] ...
6
votes
2answers
130 views

Does it make sense to use a cursor for complex business logic?

I am dealing with a pretty extensive data set. After a few joins, the foundation table has something like 40 columns. The next 40 columns will all be calculated. I am trying to keep my Java clean of ...
1
vote
1answer
80 views

auto generated web CMS for pre-existing SQL db?

What I'm looking for is a way to auto-generate a simple web-based CMS for a simple pre-existing SQL database. To be used by 'app administrators', not the general public. Something that: allows ...
-1
votes
2answers
90 views

Does sql use hastables for indexes? [closed]

Are there other ways of indexing?, Which are the more used? Does sql have an standard for indexes, it uses hash tables?
2
votes
4answers
106 views

Data Model - How to better model this circular reference

I'm designing the data model for a project where users can create documents, save revisions of that document that can be reverted to, and publish documents. The basic data model I have right now is ...
2
votes
1answer
220 views

How is one or more aggregate function implemented in most SQL engines?

In the book Database Fundamentals, Silberschatz. It is explained that aggregate functions can be calculated on the march. This make sense. What it means is that for calculating the maximun, average ...
0
votes
3answers
741 views

What is selection and what is projection

I am working on Android with the query() method of the ContentResolver class and it accepts 6 parameters, (uri,projection,selection,selectionArgs,sortOrder,cancellationSignal) for selection and ...
1
vote
1answer
145 views

Getting data from a database with the MVC model

I am creating an application which will have a very large database to draw it's information from (a student registration system to be exact). The database is created with Microsoft SQL Server if that ...
3
votes
3answers
159 views

How to test data based on SQL queries?

I'm trying to set up a test framework for (SQL) datasets that get updated daily. I want to write assertions that involve comparisons between two tables–for example, the sum of column visitors in the ...
7
votes
4answers
248 views

Encapsulation for complex queries

I tried asking this question first on StakOverflow in a more concrete manner, but after being pointed here I realized I should rephrase it in more general terms; however, you can still review the ...
9
votes
4answers
1k views

Should database queries be abstracted out of the page itself?

When writing page generation in PHP, I often find myself writing a set of files littered with database queries. For example, I might have a query to fetch some data about a post directly from the ...
-1
votes
3answers
193 views

What to do with database foreign keys in an entity class?

I know that an attribute defines the state of an object. So, is it correct to keep attributes that don't define the state of an object of a class? For example, I have an Employee class, which has ...
42
votes
8answers
6k views

Is the use of NoSQL Databases impractical for large datasets where you need to search by content?

I've been learning about NoSQL Databases for a week now. I really understand the advantages of NoSQL Databases and the many use cases they are great for. But often people write their articles as if ...
2
votes
0answers
60 views

ODBC 3 Multiple Statements vs Multiple Connections

So right now I have a single thread to handle all the requests for the database. Let's say I have 400 requests per second for logins / logouts / other stuff, and 400 requests per second which are only ...
3
votes
7answers
10k views

What is faster? Using REST API or querying a database directly?

What is faster performance wise? Creating a REST API and having your web app use the REST API to do all interactions with your database OR querying your database directly (i.e. using whatever typical ...
0
votes
1answer
68 views

Why storing a payroll in XML type field would be good or bad

We have a PAYROLL issues by the client to make it dynamic i.e. to make the whole process computerized. It includes: Employees Allowances (Scale wise, which could change yearly or monthly or ...
0
votes
3answers
114 views

Getting RowCount without wasting resources

I have a large SQL query that relates 6-7 different tables and returns fourteen different rows as distinct sets, in a union with an equally-large query, that at times can return over a thousand ...
1
vote
0answers
110 views

SQL Query and Java Constant Abuse?

I am currently charged with taking over a lot of code that is written with fields names placed into Java constant at the top of the file, and then the SQL queries constructed using string ...
2
votes
3answers
222 views

Tracking time users spend on my website

We are going to track user engagement (i.e. time spent on website, 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 ...
2
votes
2answers
347 views

SQL query or C# .net code for csv files import?

My aim here is to find out the best possible and feasible solution for my dilemma. I want to import some csv file (may contain around 50~60K records) into database after some manipulation into the ...
1
vote
0answers
47 views

More scalable alternative to a transaction-per.request in a SQL+REST stack?

I'm new in web programming with SQL database. So please forgive my ignorance. I'm using some modern framework to make a REST server with a SQL database. I'm using transaction only when I think I need ...