T-SQL

Technical Article

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 […]

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2002-08-27

828 reads

Technical Article

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 […]

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2002-08-23

849 reads

Technical Article

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

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Question of the Day

Running SQLCMD I

I run the SQLCMD utility as follows:

lcmd -S localhost -E
I then type this (the 1> is the prompt):
1> select @@version go
If I hit enter, what happens?

See possible answers