Run T-SQL in Parallel

• by john_wong_ca

• John Huang’s Blog

Writing CLR procedures to run T-SQL concurrently is not an extremely new idea. I have seen a lot of implementations...

2015-12-03

1,670 reads

Print Long String

• by john_wong_ca

• John Huang’s Blog

Quite often, I output information through PRINT command. It works well only when message is shorter than 8000 bytes. When...

2015-11-26 (first published: 2015-11-19)

1,680 reads

Get All Referenced Tables and Columns

• by john_wong_ca

• John Huang’s Blog

I was always challenged when my customers asked me what tables and columns are referenced by a stored procedure which...

2015-11-19

1,410 reads

Changed SoundEx Disables Index While Upgrading to SQL 2012

• by john_wong_ca

• John Huang’s Blog

Implementation of SoundEx function is changed in SQL Server 2012, described here. For an example, the result of SOUNDEX(‘Csomorova’) in...

2013-12-17

920 reads

Create Semaphore in Sybase

• by john_wong_ca

• John Huang’s Blog

It seems like I am going to write another none SQL stuff again. No. This is a real life scenario....

2013-11-07

1,118 reads

Len() and DataLength()

• by john_wong_ca

• John Huang’s Blog

Both system functions, Len() and DataLength(), in SQL Server are used to measure the length of the data. The main...

2013-05-16

1,243 reads

Protect Yourself from Using DBCC WritePage

• by john_wong_ca

• John Huang’s Blog

I blogged DBCC WritePage a year ago here http://www.sqlnotes.info/2011/11/23/dbcc-writepage/. It’s an extremely dangerous command especially with the last parameter “directORbufferpool”...

2013-05-14

961 reads

Attach Database with Missing NDF File

• by john_wong_ca

• John Huang’s Blog

I wonder if you’ve had the situation that I had before where you have to attach a database with one...

2013-05-13 (first published: 2013-05-07)

2,607 reads

• Discuss

Bring Offline File Online — Modify SQL Server Metadata

• by john_wong_ca

• John Huang’s Blog

In my last post, I demonstrated how to mount a database with missing NDF files. In the end, we still...

2013-05-09

1,521 reads

Fix Page Checksum

• by john_wong_ca

• John Huang’s Blog

A checksum value is tagged with every data page in SQL Server. This is used to detect issues on the...

2013-05-02

1,503 reads