When creating indexes on tables, it is always best to choose columns that have a high degree of selectivity, or uniqueness. This SP, ShowUniqueness, gives the user an easy way to determine the "uniqueness" percentage of a given column or combination of columns.
2002-10-23
468 reads
We are constantly having to drop indexesfrom tables while repopulating the datain the table. We then have to rebuild the indexes as they were before dropping them.This requires writing a custom drop and recreate index script for each unique situation. If we tryto write scripts ahead of time as soon as the indexing schemechanges on […]
2002-08-06
960 reads
this script describes the steps neccessary to implement full text indexing in TSQL on your SQL SERVER systemCan be used programatically in tsql code
2002-07-10
730 reads
This script returns the index locking strategy informationfor all user tables in a database. It also generates the required TSQL statement to alter locking strategies if required. These statements require CTRL-C and CTRL-V individually into query analyser for execution. Results are best viewed in text only. This TSQL can be wrapped in a stored procedure […]
2002-07-04
1,389 reads
This script will be helpful in detecting duplicate indexes created ( on the same set of field(s) ). These would have been created by accident, because of their existence the performance will be affected.
2002-04-16
1,830 reads
Given a table name as the parameter, all the indexes on the table can be dropped. This script can be useful if you want to drop indexes on a table inside another procedure
2002-03-12
13,868 reads
This script reindexes all user and system indexes in the database using the original fillfactor allocated to that index. It can be executed from the Query Analyzer as stand alone SQL or you could wrap it in a stored procedure.
2002-01-11
8,155 reads
Use this script to see showcontig for all tables in the context of the database in which its called. Very handy to schedule during off peak hours prior to any re-indexing to see how bad things are and re-build certain indexes sooner than you thought for peak performance.
2001-08-20
4,200 reads
This will show the fragmentation and stats before and after a reindex of a specified table. Run in the context for the db that holds the table the proc will get passed and re-index. Complile in master since the master is checked first for any SP that is prefixed with SP_ and you can call […]
2001-08-13
4,040 reads
When loading data, nothing can be more frustrating than having to deal with stubborn constraints and triggers. This is especially true when you know your data is fine but the constraints are too prohibitive for a mass initial load. Here's a technique I use to disable the constraints and triggers temporarily during a mass load. […]
2001-08-08
3,078 reads
By Vinay Thakur
Continuing from Day 4 where we learned Encoder, Decoder, and Attention Mechanism, today we...
By Vinay Thakur
Continuing from Day 3 where we covered LLM models open/closed and their parameters, Today...
By Steve Jones
One of the nice things about Flyway Desktop is that it helps you manage...
I'm fairly certain I know the answer to this from digging into it yesterday,...
Hi Team, I am trying to refresh the Azure Synapse Dedicated pool from production...
hi everyone I am not sure how to write the query that will produce...
I have some data in a table:
CREATE TABLE #test_data
(
id INT PRIMARY KEY,
name VARCHAR(100),
birth_date DATE
);
-- Step 2: Insert rows
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT *
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t; See possible answers