Questions tagged [t-sql]

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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Optimizing performance of T-SQL code

This is sql code is about showing business locations that are within a certain proximity to other of interest businesses. It will eventually become a stored procedure once it works properly. My basic ...
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-2 votes
1 answer
46 views

T-SQL Query Performance [closed]

The query below already has indexes based its execution plan but it is still under performant with larger datasets. Are the additional null checks needed and why? Do you see anything that can be done ...
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3 votes
2 answers
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Alter authorization on all non-system SQL Server databases

I am not very experienced with T-SQL and feel this can be done better. The script changes ownership of all "user" (non-system) databases to sa. Usage of a ...
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2 votes
2 answers
49 views

Complex reporting query suggestion needed for different approach as per latest Tsql format

We have recently migrated from SQL Server 2008 R2 to SQL Server 2017 web edition. I am not a SQL developer but enthuses to learn. Since many of our scrips are of old SQL format, I am searching for ...
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1 vote
0 answers
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Re-organizing indices in case of fragmentation is T-SQL

In order to keep the fragmentation ratio of indices low, you should re-organize the indices from time to time on MSSQL. Microsoft describes in the link below how you can check the fragmentation of ...
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5 votes
1 answer
183 views

Basic schemas for database and tables creation, bulk import from .csv and basic queries

The following SQL code serves the purpose of assessing basic SQL Server literacy. I am creating database and tables schemas, inserting data from .csv files. Constructing 8 simple queries as answers to ...
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1 answer
135 views

SQL Query to perform a "reverse exclusion" on a LEFT JOIN with a select from the left side table

I have a set of tables that I want to execute a LEFT JOIN on and bring back "excluded" rows. In addition, I would like the left table's ID included as ...
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3 votes
2 answers
99 views

all appointment based on interval distance

Currently with a given Date and an Interval in Day, I can calculate all of the appointment in the future. for example if you are ...
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3 votes
0 answers
32 views

SEDE query calculating user reputation averages

I've created the following SEDE query which calculates the reputation averages of users on a particular site. It also optionally excludes "new" users (users with rep of 1 or 101 so note 100% ...
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1 vote
1 answer
52 views

MSSQL database structure and stored procedure performance

I build database called MessageBoard and created StoredProcedure GetHomeView that return data for HomeView. I am completely new ...
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5 votes
2 answers
209 views

Query with multiple foreign keys to the same table

I have a primary table, REP_ASSIST.ES_LOG with multiple columns that are foreign keys to another table, ...
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4 votes
2 answers
175 views

Function to get current value or default from a string of two values

I have SQL scripts that I want to be executable directly in the editor (like DataGrip or SSMS) and also in automated integration tests. However, in each use-case they require different environment and ...
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3 votes
1 answer
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SQL Sub-query with running total optimization

The codes below get the rows of data until it reaches the total running quantity limit. Notice that the SQL uses sub-query. ...
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1 vote
1 answer
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T-SQL Getting Sequential events with first even criteria

I have a query I am writing where I want output if a person has some service provided, then I want all the services they had provided after that and I don't want the individual returned if that is the ...
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3 votes
1 answer
671 views

Daily SQL job to delete records older than 24 hours

Below is a delete job to delete 1M+ records daily and takes 13 hours to complete and sometimes more than that. I need to optimize this. The table tblcalldatastore is being inserted 24*7 through a ...
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11 votes
1 answer
215 views

Safe dynamic SQL for generic search

Prompted by discussion about SQL injection, I wanted to put a proof of concept forward to get feedback about whether this is in fact safe and protected against SQL injection or other malicious use. ...
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2 votes
2 answers
257 views

Build WHERE clause for search conditions [closed]

Here is a set of classes that are used to build where clause for SQL Server and Oracle for different field types e.g. text, <...
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1 vote
2 answers
73 views

Combining two queries in one

What I want is getting all names (first, middle, last) of the users along with each of their total hours of work which will be calculated by the SQL statement: ...
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1 vote
0 answers
62 views

Select splat in a subquery [closed]

Obviously, 'select *' is never a good idea. HOWEVER, I have taken a job with an org that allowed this cancer to spread. They have huge queries, using ...
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1 vote
1 answer
85 views

T-SQL query Choose name of clients, concluded more than one loan agreement in 2010

QUESTION: Choose the name of clients, concluded more than one loan agreement in 2010, as the numbers and dates of issue of these contracts. Sort by name of the client and date of issue of the loan. ...
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Parties and Messages in SQL e-Commerce db design

I'm posting a follow-up question based on my first question. My goal is to, as an exercise for myself, create a complex (in my opinion) e-commerce application. The explanation of the application can ...
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3 votes
1 answer
41 views

T-SQL Query remove duplicates except for original row from the table

Question: There is an Exam_Merge table into which to import records from a similarly structured table in another database. In this case, the Exam_Merge table contains the values of the primary key ID ...
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4 votes
1 answer
190 views

SQL query to count loans issued during each week

Calculate the number of loans issued by the Regional offices for each business week in the period from 38 to 40 business week of 2011 inclusive. Sort by name of the regional unit, business week. ...
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4 votes
1 answer
656 views

SQL e-commerce database design

I want as an exercise to create an e-commerce application from bottom up. My main goal here is to gain a lot of knowledge. I have experience in web development, but never have been there from the ...
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1 vote
1 answer
60 views

Query to generate payroll based on attendance for a month

I have written a query to generate payroll based on attendance for a month, for about 4000 employees. It takes quite a long time to execute. Basically, what I am doing is to joining two different ...
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1 vote
1 answer
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Insert multiple rows without using CURSOR SQL Server 2014

I have a fairly complex query which insert multiple rows into a table from multiple tables. Its works fine but I really don't want to use cursor as some blog says cursor took long time for execution (...
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1 vote
1 answer
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Initialize various commands for the SqlDataAdapter

This is my code for my SqlDataAdapter which is similar to the code example given in the docs: ...
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3 votes
2 answers
319 views

SQL Query - records within the last year

Bit of a complicated one for me. I have a database full of hundreds of thousands of records, many of which are duplicated. I need to get all records within the last year but making sure every ...
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2 votes
1 answer
446 views

Determining daylight-saving time in Central European Time

(We are on SQL Server 2008). The following constellation: Our applications passes date&time around (in the most horrible way possible). We want to simplify this. Instead of a culture-specific ...
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7 votes
1 answer
156 views

Retrieving the IDs of entries to be deleted from a table

Business logic It would take us too far to explain the whole business case behind this code, so I'll try to be as succinct as possible. There are Persons, and ...
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4 votes
1 answer
59 views

Get local datetime from UTC time

One of the app is inserting date in UTC format (column CreateDate). When reporting from this table, I used a difference in hours between the inbuilt ...
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2 votes
1 answer
208 views

Validating region/state/province codes for different countries

I have a large table in which I store region/state/province codes (two letters) from different countries. I use these region codes further downstream for multiple process. One of the steps I do is a ...
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3 votes
1 answer
147 views

SQL SP creating certificates for shipping

We ship large spools of copper wire and pallets of copper rod that have to meet specific chemical and mechanical requirements, this is what must be put on the certifications. I created an SP which ...
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0 votes
1 answer
51 views

Updating 3 columns conditionally on a database table

I need to run this script to update the value of 3 columns based on certain conditions. Right now, this is what I have: ...
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3 votes
1 answer
71 views

Loop Through bitarray to retrieve subsets of that bitarray

Objective: I want to loop through a bitarray and store subsets of that bitarray in a table. Context: I have a bitarray with 48 elements where each element represent one hour. I want to look back 24 ...
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3 votes
1 answer
923 views

Inserting data into SQL-Server table dynamically

I know I can do all this via SSMA quite quickly, but I wanted to see if I could do it efficiently in PowerShell myself as a little project. Basically, the entire script takes tables from an Access ...
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1 vote
1 answer
97 views

SQL Stored Procedure to export specified data

I'm currently using a stored procedure(sproc) to export to Excel. The sproc is being passed ...
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1 vote
0 answers
179 views

Stored procedure that adds row-level auditing to a table

I'm looking for any suggestions on how to improve my T-SQL for this procedure. It works okay, but I'd like to get advice to improve it from more experienced SQL developers. This procedure adds 4 ...
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1 vote
1 answer
198 views

Calculate NPS in a stored procedure

We collect customer surveys and one of the questions is the dreaded "How likely are you to recommend our service?" question from which we calculate a Net Promoter Score. (I hate this calculation, but ...
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4 votes
1 answer
108 views

Retrieving a product's sold quantity

I've written a view to retrieve each product's sold quantity and four week sales average by Branch/Route/...
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6 votes
2 answers
108 views

Find how much reputation a user had on a given date

I saw this question on MSE and went ahead and wrote a solution to it: https://meta.stackexchange.com/questions/313561/determining-users-reputation-as-of-particular-date This calculates the ...
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  • 330
0 votes
1 answer
65 views

Filtering query by date built from integers

I am trying to make a stored procedure and pass some parameters for filtering. As soon as filtering is in horizon, code has to be as generic as possible with as few as possible ...
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7 votes
0 answers
146 views

Modeling tabular structure in MSSQL to store data like Excel sheet applying Column inheritance

I've created this database structure to store tabular information (it's a simplification of my real structure but enough to show the point). In it I have Sheets and ...
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4 votes
0 answers
52 views

Insert a page definition in the right order

I have a table SlideList that defines all available slides that can be put into a PowerPoint presentation. I have a table ...
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  • 1,255
4 votes
2 answers
97 views

Simple locale loader

I have a class that loads locales from a database. I'm not sure if locale is the right word. It's basically loading texts for a game, generic sayings like alerts and error messages. I'm also not sure ...
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3 votes
1 answer
76 views

Simple script to insert data

This is a simple script which inserts data into a couple of tables. I'm very new to SQL so any feeback, of any kind, would be much appreciated! ...
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0 votes
2 answers
2k views

Merge table stored procedure

I wrote a stored procedure that will do a merge of two tables: ...
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3 votes
2 answers
90 views

SQL Server - Iterate, aggregate, and insert

I'm trying to find an efficient way to aggregate data for reporting. Let's say I need to aggregate the following data in 5-second intervals: ...
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4 votes
1 answer
36 views

Parse numbers from text based on relative position to certain substrings

The input is a product code. I want to pull out the "percentage" portion of that code. For example, if the code contains the substring BIO, I want all the numbers that follow it until I hit another ...
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2 votes
1 answer
65 views

SQL Query to check if 100+ (or Dynamic) columns in table is null

Let assume a table has more than 100 of columns & I want to display all the rows when all of its columns (Col1, Col2, ..., ColN) are nulls except for the column(s) I mentioned (PK). This is just ...
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