A simple script to list tables in database without primary key, using sys.tables and OBJECTPROPERTY TableHasPrimaryKey in SQL Server 2005.
SQL SERVER – 2005 Constraint on VARCHAR(MAX) Field To Limit It Certain Length
SQL Server 2005 has no VARCHAR(12500), so how do you cap a VARCHAR(MAX) field at 12500 characters? A constraint on the column does the job.
SQL SERVER – Primary Key Must Not Contain NULL – Primary Key are NOT NULL
Can you have a nullable primary key? No. A primary key must not contain NULL: Allow Nulls cannot be set on its columns, and all values must be unique.
REGEXP_LIKE in SQL Server 2025: Validating Codes, Emails and Phone Numbers
Validate codes, email shapes and phone numbers with REGEXP_LIKE in SQL Server 2025, using clear patterns and CHECK constraints.
SQL SERVER – Good, Better and Best Programming Techniques
My notes for a programmers meeting on Good, Better and Best Programming Techniques in SQL Server, plus a funny bug ticket about a client who got no email.
SQL SERVER – Difference Between Unique Index vs Unique Constraint
Unique Index vs Unique Constraint: is there a difference? No. A unique constraint creates a unique index, and performance is the same. Syntax for both.
SQL SERVER – Understanding new Index Type of SQL Server 2005 Included Column Index along with Clustered Index and Non-clustered Index
Clustered index and non-clustered index compared: how many you can have, how each stores data, and where the SQL Server 2005 included column index fits.