LocalDB runs SQL Server Express engine features in a developer-friendly local process; learn how to start, connect, and recognize its limits.
Stop Blaming the User: Let Constraints Catch Bad Data
Blaming the user is the oldest joke in IT. Here’s why it fails, and how NOT NULL, CHECK, UNIQUE and foreign keys stop bad data before it lands.
Count Distinct Pairs: Keep the Columns Together
Count distinct pairs by keeping their columns together. A small T-SQL example shows why concatenated labels can collide. Choose whether incomplete pairs belong in the count.
A Learning Path for a New SQL Developer
A new SQL developer can build skill in a clear order: relational basics, T-SQL, data modeling, plans, testing, and safe deployment habits.
QUOTENAME Object Names: Quote Each SQL Server Name Part
QUOTENAME object names separately to keep each part of a qualified SQL Server name intact. The function surrounds its entire input with identifier delimiters. A dot inside that input stays inside one quoted name. I keep the schema and object in separate variables.
Connecting PHP to SQL Server
Connecting PHP to SQL Server means choosing SQLSRV or PDO_SQLSRV, binding parameters, validating TLS, and keeping web queries efficient.
Giving Web Developers Safe Database Access
Give web developers safe database access with narrow roles and views, a reporting replica where useful, and audit that identifies real changes.