Finding code smells using SQL Prompt: TOP without ORDER BY in a SELECT statement (BP006)

Using TOP in a SELECT statement, without a subsequent ORDER BY clause, is legal in SQL Server, but meaningless because asking for the TOP x rows implies that the data is guaranteed to be in a certain order, and tables have no implicit logical order. You must specify the order. Read more

Choosing Between Table Variables and Temporary Tables (ST011, ST012)

Phil Factor demonstrates the use of temporary tables and table variables, and offers a few simple rules to decide if a table variable will give better performance than a temp table (ST011), or vice-versa (ST012). Read more

Monitoring Distributed SQL Servers using SQL Monitor

If your SQL Server estate is large, or installed across different, isolated networks, or both, then you need a distributed monitoring solution. It is very easy to set up multiple base monitors in SQL Monitor, and then to manage the monitoring, alerting and troubleshooting for your entire SQL Server estate, from a single web interface. Read more

Pseudonymizing your data with SQL Data Generator

Starting from a database view, as the basis for a typical sales reports, Phil factor shows how to generate a data-masked version of this report, which the Tax Men can safely pore over. Read more

Automatic Provisioning of Developer Databases with SQL Provision

Steve Jones shows a simple way to provision full size databases for developers, using production like data that has been masked automatically as part of the provisioning process. Read more

SQL Compare Snapshots: a lightweight database version control and rollback mechanism

During the proof-of-concept phase of development work, SQL Compare Snapshots offer an easy way to work out what broke, if a change causes some tests to fail, as well as a simple ‘roll back’ technique to return quickly to the last working copy. Read more

Avoid use of the MONEY and SMALLMONEY datatypes (BP022)

Use of the MONEY and SMALLMONEY datatypes can lead to unintentional loss of precision, due to rounding errors, during calculations. It is generally far better to use the DECIMAL, a.k.a. NUMERIC, type. Read more

A strategy for implementing database source control

Much has been written on the strategic benefits of having a database under source control though many articles are clear on “why” but conspicuously vague on “how”. Dave Poole tries to fill in some of the gaps. Read more

Custom Metrics for Detecting Problems with Ad-hoc Queries

Overuse of ad-hoc queries by applications is a common source of SQL Server performance problems. The symptoms include high CPU and memory pressure. Phil Factor offers a simple custom metric to monitor the percentage of ad-hoc queries being executed on a database, and shows how SQL Monitor can detect when the problem is happening, and show you the queries that are affecting the server. Read more