How to Apply Non-Standard SQL Formatting Using SQL Prompt

SQL Prompt not only will format your code exactly as you want, but will also help you switch quickly to an alternative style, or to apply exceptions to certain parts of a SQL script, where your preferred style isn't what's required. Read more

The Whys and Wherefores of Untrusted or Disabled Constraints

Having untrusted or disabled FOREIGN KEY or CHECK constraints in your databases will degrade data consistency and integrity and can cause query performance problems. Phil Factor explains how to detect these and other table-related issues, during development, before they cause trouble further down the line. Read more

SQL Prompt Code Analysis: A Hint is Used (PE004-7)

Phil Factor suggests a philosophy of "the SQL query optimizer knows best" when it comes to choosing the right execution plan. Use hints as a last resort, and evaluate them carefully whenever SQL Prompt warns you of their presence in your SQL code. Read more

SQL Prompt Code Analysis: Table does not have clustered index (BP021)

If SQL Prompt alerts you to a table without a clustered index, investigate the reason for its absence carefully. It is rare indeed to find a table where data retrieval is faster without one. Read more

SQL Prompt as a Layout Tool: A Survival Guide

Phil Factor's guide to taming SQL Prompt code layout options, and getting it to format code exactly the way you like it. Read more

Testing the Performance of Individual SQL Statements within a Batch using SQL Prompt

With SQL Prompt and Phil Factor's chk code snippet, you can, with a few clicks, get a list of all the SQL statements executed within a batch, in SSMS, their execution plans, and their execution statistics, such as duration, CPU, logical reads and so on. Read more

SQL Prompt Code Analysis: Avoid using the ISNUMERIC Function (E1029)

Avoid using the IsNumeric() function, because it can often lead to data type conversion errors, when importing data. On SQL Server 2012 or later, use the Try_Convert() or Try_Cast() function instead. On earlier SQL Server versions, the only way to avoid it is by using LIKE expressions. Read more

SQL Prompt Code Analysis: INSERT INTO a permanent table with ORDER BY (PE020)

Data in relational tables is never guaranteed to be returned in a particular order, so adding an ORDER BY to an INSERT INTO statement is meaningless and, pre-SQL Server 2012, could cause performance issues. If you really need to impose a particular order on rows in the table, use a Row_Number() window clause instead. Read more

SQL Prompt code analysis: avoid non-standard column aliases (ST002 and DEP021)

If you declare a column alias using equals SQL Prompt will raise a violation of a style rule (ST002). It's best to follow the ANSI-SQL92 standard of assigning aliases using the AS keyword. If the alias is not a standard identifier, delimit it with double quotes. using single quotes has long been deprecated (DEP021). Read more

SQL Prompt code analysis: avoiding the old-style TOP clause (ST006)

If you want to use TOP with an expression or subquery, or in INSERT, UPDATE, MERGE, and DELETE statements, then use of brackets is required, so it's a good habit to adopt everywhere. Read more

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