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].
214
questions
-2
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1
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44
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Optimizing a TRANSACT SQL statement [closed]
I'm in need to optimize the following TRANSACT SQL statement :
...
3
votes
0
answers
43
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SQL query to pivot table into dynamically growing set of columns
I am working on SQL Server I have sample data like this in a table.
CustId
Bank
city
rating
date
rnk
1
Deutsche
Delhi
5
10/10/2022
1
1
BOA
Pune
6
10/10/2022
2
1
UBS
Mumbai
7
10/10/2022
3
1
SBI
...
- 31
5
votes
0
answers
47
views
Message-free flow-oriented logger
Today, I've got a small FlowLogger for you to review. The idea is not to log pure messages, but focus on the flow of the app that might contain such items as:
<...
- 44k
0
votes
1
answer
45
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Find dogs who stopped being good boys without ever being good boys - Was HAVING the wrong approach?
The problem I have solved is as follows:
Consider a table of dogs, DOGGIES, that records on each row the ID of a doggy, one ...
- 63
-2
votes
1
answer
50
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 ...
- 135
3
votes
2
answers
91
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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 ...
- 3,480
2
votes
2
answers
50
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 ...
1
vote
0
answers
25
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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 ...
- 245
5
votes
1
answer
188
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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 ...
0
votes
1
answer
185
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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 ...
- 101
3
votes
2
answers
116
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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 ...
- 31
3
votes
0
answers
32
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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% ...
- 613
1
vote
1
answer
53
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 ...
- 19
5
votes
2
answers
383
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, ...
- 217
4
votes
2
answers
184
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 ...
- 44k
3
votes
1
answer
77
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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. ...
- 133
1
vote
1
answer
29
views
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 ...
- 157
3
votes
1
answer
880
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 ...
- 43
11
votes
1
answer
244
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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. ...
- 2,009
2
votes
2
answers
286
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, <...
- 267
1
vote
2
answers
84
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: ...
1
vote
0
answers
77
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 ...
1
vote
1
answer
91
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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3
votes
1
answer
43
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
...
- 193
4
votes
1
answer
209
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
894
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 ...
- 143
1
vote
1
answer
65
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 ...
- 23
1
vote
1
answer
550
views
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 (...
- 23
1
vote
1
answer
101
views
Initialize various commands for the SqlDataAdapter
This is my code for my SqlDataAdapter which is similar to the code example given in the docs:
...
- 155
3
votes
2
answers
393
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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 ...
- 201
1
vote
1
answer
757
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 ...
- 159
7
votes
1
answer
182
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 ...
- 11.1k
4
votes
1
answer
65
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 ...
- 223
2
votes
1
answer
290
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 ...
- 141
3
votes
1
answer
149
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 ...
- 185
0
votes
1
answer
53
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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- 103
3
votes
1
answer
79
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 ...
- 31
3
votes
1
answer
1k
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 ...
- 95
1
vote
1
answer
100
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 ...
- 111
1
vote
0
answers
187
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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 ...
- 500
1
vote
1
answer
232
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 ...
- 1,290
4
votes
1
answer
110
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/...
- 1,961
6
votes
2
answers
111
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 ...
- 330
0
votes
1
answer
67
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 ...
- 286
7
votes
0
answers
154
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 ...
4
votes
0
answers
53
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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4
votes
2
answers
102
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
78
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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!
...
- 341
0
votes
2
answers
3k
views
3
votes
2
answers
95
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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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