Transact-SQL (TSQL) is the extended SQL dialect used in Microsoft SQL Server and Sybase. Please also tag with either [sql-server] or [sybase].

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SQL query to include one column value for one condition and exclude other columns

I am learning writing T-SQL queries. The ITEMS table has a column named mfg possible values (R, K, I, Z). The ...
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Adding dynamic column names to a table

I'm using Microsoft SQL Server 2014 Express. I found myself wanting to add the Columns CompanyNameChangeDate (1 through 10) and ...
3
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Data Explorer query that makes bar graphs

I wrote a query for SEDE that I think is pretty cool. It uses the currently available graphing capabilities (scatter plots) to create a bar graph. I have used it as the subject for a self-answer on ...
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1answer
41 views

Demographics information for EDI report

I am going through some of my companies EDI reports to see if I can make them faster. The query below runs in less than one second in our AWS RDS environment, but it takes ~55 seconds on a blade in ...
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30 views

Queries within transaction

I am almost finished with my queries which are running inside transactions so it's everything or nothing... Could you please take a look if I am missing something or if everything is where it belongs? ...
8
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1answer
99 views

Top 10 editors partitioned by year

I wanted to get some stats on who has done the most edits on Code Review, so I wrote the following query on SE Data Explorer. All improvement suggestions are welcome. Note that I used a cursor to ...
2
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2answers
67 views

TSQL query to gather amounts for an employees, spouses, and children in one row

I have a query that works as intended, kind of pulling from multiple records in a table, and flattening the data into one row. I am wondering if there is a faster/more semantically correct way to do ...
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2answers
58 views

Pivot script for sales numbers

I've recently been tasked with migrating some code stacks for an applicatin that is moving from using Access to using SQL-Server. I don't usually use PIVOT all ...
4
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1answer
63 views

SQL procedure for Archiving and Deleting

I have a requirement for archiving 5 huge tables from PROD to ARCHIVE server without losing the integrity of the tables. The query makes use of the Linked Server functionality and current idea is to ...
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0answers
37 views

T-SQL Secure String Comparison

The previous version of my function was scalar-valued and employed a WHILE loop to do the comparison, this is SLOW. This new version is tabled-valued and uses a typical tally table in place of the ...
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1answer
18 views

Get top row for muliple registers

I came across a piece of code that generates SELECT queries from a template. The template: ...
18
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3answers
526 views

Stack Exchange User Activity Score

About This is a SEDE query which will calculate your activity and participation on a site. It's geared for Programming Puzzles & Code Golf where questions are values more, but the values can be ...
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29 views

Validating an NPI in T-SQL (Luhn's Algorithm)

The requirements for validating a national provider identifier can be found here. Here's my attempt at a T-SQL implementation: ...
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2answers
127 views

Insert or update user data

I inherited an application that uses some stored procedures. Here is a sample of one of the stored procedures used to insert or modify user data. would like to get the group's opinion on the code. ...
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What are the top voted comments on closed questions, and who made the comments?

Following this linked question and the feedback it generated, I put together a new query which utilizes a JOIN. ...
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1answer
60 views

What percentage of down votes are users responsible for?

I put together this simple query to calculate the percentage of downvotes each user is responsible for and displaying them in order of downvote percentage. It's generating the desired results, but I ...
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2answers
72 views

Deduplicating value pairs between 2 columns

This was asked in the SQL Helpline room: ...
4
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2answers
58 views

Top Python badged users from NYC

I forked this StackExchange Data Explorer (SEDE) query from another one, and made it a bit more complex. I'm looking for feedback on my style, as well as answers to other questions (see below). ...
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2answers
213 views

Replacement for sp_MSforeachdb

Having been informed that sp_MSforeachdb is undocumented and unsupported, I have been working on creating a replacement stored procedure based off the work done ...
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1answer
55 views

SQL Inserting up to 10'000 records from a table to a secondary table

I'm relatively new to ASP.net and working with larger data sets as a fresh graduate, and I am currently maintaining/developing for an ASP webform and T-SQL system at the moment where we have a ...
3
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3answers
296 views

SQL Procedure that will calculate the Last Price paid for a certain Part

I am trying to write an SQL Procedure that will calculate the Last Price paid for a certain Part. ...
6
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2answers
110 views

Finding customer searches and graphing their items

One of the reports I am working on requires me to locate searches a customer makes, and graph them in certain manners. I have one query I'm particularly concerned about. This one takes the most ...
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1answer
59 views

Report for a restaurant showing hourly sales information for a given timespan

I have been tasked with creating a report for a high-volume restaurant that shows hourly sales information for a given timespan. When generating this report for a single day, it's very quick, but when ...
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2answers
55 views

Execute every Monday that is not the Monday following last Saturday in month

I think the following is good but wondering if it can be simplified or improved. My condition for code execution is the following: It is a Monday AND It is not the Monday following the last Saturday ...
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2answers
91 views

Query to count interactions between users

The source data represents interaction between people. Some are internal, others are external. The internals are recorded in the Users table (represented as the ...
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1answer
68 views

Coin flips and Dice rolls in a stored procedure

I saw a post in chat a few days ago, of what I thought was an interesting (albeit fairly simple) statistical challenge: By @skiwi: If I shoot once with 50% chance of target A and 50% of target B, ...
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1answer
35 views

Selecting time metadata off a calendar table

I have a report on SSRS (that's SQL Server Reporting Services) that I need to be able to parameterize so that it can run for.. Yesterday (scheduled every morning) The week that just elapsed ...
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119 views

Executing dynamic SQL programmatically

Usage (all parameters are optional): ...
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2answers
76 views

FizzBuzz in T-SQL

I've written a simple FizzBuzz in TSQL using some IF loops. Here's a SEDE link to run it in your browser. ...
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2answers
36 views

Sql Server: Getting the highest value based on two uniqueidentifiers - possible to avoid union?

I have two riscProfileTypeIds (both of type uniqueidentifier) of which I need the one with the highest sequence number (the ...
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2answers
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University Database

I am building a database for a hypothetical university. This is my SQL definition, with generated data added for my future use, such as demonstrating queries: ...
2
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1answer
80 views

Counting email addresses with different status

I want to count email addresses with different status. I use ASP.NET MVC and this query is supposed to run every 5 minutes on these tables, which every table is on different .ndf files. About 5 ...
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1answer
80 views

T-SQL Constant Time Comparison

Explanation is in the function. Please point out any egregious errors: ...
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T-SQL Totp (Rfc6238 SHA2_256) Implementation

Using my previous function as a base I've come up the following: ...
3
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1answer
48 views

Returning two dates based on input

I created a function that will return 2 dates that depend on an input parameter. When the parameter is: 1 - return start date of current week and end date of current week 2 - return start date of ...
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2answers
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Searching for bad Minecraft questions on Gaming.SE

To preface this post a little bit, I'll explain a little bit of the "backstory" here. The Stack Exchange site, Gaming.SE, also known as Arqade, often has a large influx of bad questions about the ...
5
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1answer
63 views

SQL with SUBSTRING / CHARINDEX

I've got a VARCHAR variable of this kind: @string = "BLABLA10;GOGOGO30;RES777;ANOTHER;" (several keyword + number separated ...
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0answers
47 views

T-SQL Pbdfk2 (Rfc2898 SHA2_256) Implementation

Using my previous function as a base I've come up the following: ...
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105 views

T-SQL Hmac (Rfc2104 SHA2_256) Implementation

I'm trying to implement an Hmac in T-SQL using this question as an guide. Please critique this: ...
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1answer
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Working Days DateDiff function

I have a calendar table with a record for every date I need to care about (i.e. 365 records per year), with various meta-information about each date, including the weekday, the fiscal calendar week, ...
2
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1answer
32 views

Find foreign key membership including owner in SQL Server

Was hoping someone could sanity-check this SQL statement. I need to find the owner (schema), table, and column on both sides of a foreign key: ...
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2answers
214 views

Find & Delete Duplicate Records on All Tables in current MSSQL Database

The purpose of this code is to search the entire database for duplicate records and produce a script that a user could then run to delete all of the duplicates. The stored procedure takes the ...
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1answer
39 views

Finding closest points without duplicates and given distance threshold

Given a bunch of latitudes and longitudes stored as Points, I would like to determine the points that are closest to each point given some maximum threshold in meters. This is my first stab at this: ...
5
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1answer
180 views

Stored Procedure code shortening and optimization

This stored procedure takes user defined table type as parameter. It contains data imported from an Excel file. Values inside that type are the same as in ...
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SQL to find table containing all specified columns

I have the below code to list all tables which have columns DataAreaId and CountryRegionId. This works, but requires me to ...
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3answers
2k views

Excuse me, how many of you are new here? Mind if I JOIN you?

I had perceived an uptick in new reviewers around here, and I wanted to see if the data backed that observation up. It's been a while since I've written any SQL, so this was a nice little exercise in ...
4
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1answer
33 views

Tag wikis under a certain length

I wrote a SEDE query to list all tag wikis with a body or an excerpt under a given number of characters. I've used this to find empty wikis or wikis with very little information. The tags can be ...
5
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1answer
56 views

Searching posts/comments by keywords

I've put together another simple query that allows you to search post/comments with specific keywords. At the moment, only post bodies are checked. ...
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2answers
78 views

Merge inserted and deleted tables in SQL trigger

I have a table with a Balance column of type decimal(18,0). I want to get updates to its ...
9
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3answers
388 views

Popular questions by view count

I made this query to create a graph of a user's popular questions and the view count on that question. It allows for a minimum of 500 views, and a score of ...