Scripts

Technical Article

Improving performance on joins to large tables.

In your tenure as a DBA/developer, you've probably been asked to write dozens of stored procedures similar to this:CREATE PROCEDURE ContactInfo@ContactID intASSELECT c.Name, a.Address, p.PhoneFROM Contact cLEFT JOIN ContactAddress aON c.ContactID = a.ContactIDLEFT JOIN ContactPhone pON c.ContactID = p.ContactIDWHERE c.ContactID = @ContactIDBut there is a more efficient way to write such a query.....particularly if you […]

(1)

You rated this post out of 5. Change rating

2003-06-03

1,439 reads

Technical Article

Find Duplicate Employees, Customers, Etc.

Customers, employees, etc. come and go.  They get entered multiple times in inconsistent formats in databases.This simple script finds the duplicates across multiple formats and is easily modified as needed.  It's so easy, my grandmother could do it. Oops! No offense Grandma.For very large databases, create and join two temp tables indexed on the namedatetring […]

You rated this post out of 5. Change rating

2003-05-30

239 reads

Technical Article

Show all User-Defined Datatypes for all Databases

This procedure displays all user-defined datatypes in all databases on a server.  Another example of the power of dynamic T-SQL, this procedure dynamically generates SELECT statements for the systypes tables in each database and UNIONs them together so that they display in one recordset.

You rated this post out of 5. Change rating

2003-05-30

188 reads

Technical Article

Script to determine if all chars are same in field

This script is a fix to the "Script to determine if all chars are same in field"posted by Harvard Kinkead (hneal_98) . That script doesn't handle strings with trailing spaces (e.g. set @repeat = 'bbbb ')It happens because of the nature of Len function. To bypass this limitation my script concatenates one character to tested […]

You rated this post out of 5. Change rating

2003-05-29

102 reads

Technical Article

Table Pivoting revisited

A lot of table pivoting scripts use cursors to reach the  desired results, but SQL scripting was developed to be utilized in a data set environment rather than sequential step-thru scripting.Normally, there are 3 types of Table Pivoting - 1) column explicit 2) column implicit and 3)single column.  COLUMN EXPLICIT will place the row value […]

You rated this post out of 5. Change rating

2003-05-29

452 reads

Blogs

A Last Minute Trip to the EU

By

My life has some crazy travel stretches for sure. Between speaking, office visits, customer...

Part 3 of 3: Tuning DiskANN — R, Alpha, L, Beam Width, Recall and Latency

By

In Part 1, we saw how ‘Vamana’ represents vectors as nodes, connects them with...

Automated SQL Server Benchmarking with HammerDB and Docker: A Complete Testing Framework

By

I’m excited to announce the release of a new open-source project that fully automates...

Read the latest Blogs

Forums

Server-Level Table sizes

By Artur Sanin

Comments posted to this topic are about the item Server-Level Table sizes

ORDER BY alias

By aniap

Comments posted to this topic are about the item ORDER BY alias

Optional Parameter Plan Optimization in SQL Server 2025: Fixing the Kitchen-Sink Search Procedure

By vgupta

Comments posted to this topic are about the item Optional Parameter Plan Optimization in...

Visit the forum

Question of the Day

ORDER BY alias

There is a table tmp_tab:

CREATE TABLE tmp_tab (
id int,
val int
);
INSERT INTO tmp_tab VALUES
(1, 1),
(2, NULL),
(3, 3),
(4, 4),
(5, 5);
You want to order the rows ids by the following expression:
    ISNULL(val, id) + 1
Which of the following queries produces the expected ordering and why? (Select all correct)

See possible answers