T-SQL

Divide big delete into several small ones

  • Script

Big transactions cause the Tlog to grow.When you do a clean of a large table, the delete statement can cause a very long transactionSometimes it's necessary to prevent this.So we divide one big delete into several little ones.A table with call centre data gets +/- 1-mlj records a day. Every day we run a script […]

2002-08-27

807 reads

Function to Return the Amount of Children in a Tree

  • Script

Assuming we have the following table (that stores hierarchical data)  :CREATE TABLE [staff] (    [employee] [int] NOT NULL ,    [employee_name] [varchar] (10) NULL ,    [supervisor] [int] NULL ,     PRIMARY KEY  CLUSTERED     (        [employee]    )  ON [PRIMARY] ,     FOREIGN KEY     (        [supervisor]    ) REFERENCES [staff] (        [employee]    ))I ‘ll built a […]

2002-08-23

824 reads

Working with email addresses in SQL Server!

  • Article

This article shows you how to design the storage for email addresses, how to validate email addresses, how to retrieve demographic information from email addresses efficiently, using computed columns and indexes. It also covers the security aspect of dealing with email addresses.

2002-08-01

1,340 reads

Blogs

Use Jupyter Notebooks to Help People on StackOverFlow

By

I am sat in the PowerShell Saturday in Hamburg. You can see me on...

ACM Lecture at SELU

By

Had the pleasure of presenting to Dr. Ghassan Alkadi and a full house at...

T-SQL Copy & Paste Pattern – Increasing a performance problem

By

Disclaimer: The title is my assumption because I saw it in the past happening...

Read the latest Blogs

Forums

Needed to find all possible Dates Overlaps from a single Table

By Hell-1934

Hi, I have the following Episode table example: Where DischDate = "2020-02-20" means - client hasn't...

Optimize Cursor

By GrassHopper

I inherited this script that has a cursor and I know this query can...

Unable to add secondary node existing node due to DCOM is unavaialble

By maroju1

Dear Team, This is Naveen, Hope all are doing well. I need emergency help...

Visit the forum

Ask SSC

SQL Server Q&A from the SQLServerCentral community

Get answers

Question of the Day

Fashion

See possible answers