SQL Archives - Page 6 of 6 - Philipp Salvisberg's Blog

2016-05-22

2016-05-22

Categories

Oracle

How to Integrate Your PL/SQL Generators in SQL Developer

About three weeks ago Steven Feuerstein tweeted in his tip #501 a link to a generator for the WHEN clause in DML triggers on Oracle Live SQL. Back then I refactored the generator for oddgen – the Oracle community’s dictionary-driven code generator – and published the result on Oracle Live SQL as well. Some […]

2015-12-07

Categories

Oracle

Outer Join Operator (+) Restrictions in 12.1.0.2?

I’m currently reviewing a draft of Roger Troller’s updated PL/SQL and SQL Coding Guidelines version 3.0. One guideline recommends using ANSI join syntax. The mentioned reasons are ANSI join syntax does not have as many restrictions as the ORACLE join syntax has. Furthermore ANSI join syntax supports the full outer join. A third […]

2014-04-30

Categories

Oracle

Trivadis PL/SQL & SQL CodeChecker for SQL Developer Released

A half a year ago Trivadis released a command line utility to scan code within a directory tree for guideline violations of the Trivadis PL/SQL & SQL Coding Guidelines Version 2.0. This tool is perfectly suited to process millions of lines of code, but an integration into Oracle SQL Developer was missing until now. […]

2014-01-02

Categories

Oracle

Column-less Table Access

While writing some JUnit tests after fixing bugs in dependency analysis views, I came up with the following query: The first view tvd_object_usage_v contains all table/view usages per object. The second view tvd_object_col_usages_v contains all column usages per object. The idea was to check the completeness of the second view tvd_object_col_usages_v. I […]

2013-10-20

Categories

Oracle

Trivadis PL/SQL & SQL CodeChecker Released

In August 2009 Trivadis – the company I work for – released the first version of their PL/SQL & SQL Coding Guidelines. Back then we made our PL/SQL assessments based on interviews and checked the code against our guidelines using Code Xpert, SQL*Plus scripts and some manual/visual checks. You may imagine that […]

2013-07-28

Categories

Oracle

Trivadis PL/SQL & SQL CodeAnalyzer Released

A month ago I talked about “Extending the Oracle Data Dictionary for Fine-Grained PL/SQL and SQL Analysis” during the ODTUG Kscope13 conference in New Orleans. Oracle data dictionary views as DBA_IDENTIFIERS or DBA_DEPENDENCIES are in many cases sufficient to analyze static PL/SQL and SQL code within the Oracle database. But what if more […]

2012-12-23

Categories

Oracle

Building Comma Separated Values with Oracle & SQL

From time to time I’m asked to aggregate strings from multiple records into a single column using SQL. Here’s an example, showing a comma-separated list of ordered employee names per department based on the famous EMP and DEPT tables. Oracle introduced the aggregate function LISTAGG for that purpose in 11.2. If you […]

2011-10-12

Categories

Oracle

Using UTL_XML.PARSEQUERY for SQL Dependency Analysis

Last week I had a talk at Oracle’s OpenWorld 2011 titled Modern PL/SQL Code Checking and Dependency Analysis. The problem I described in chapter 4 was to find all view columns using the column UNIT_COST of the table COSTS in the SH schema. Other usages of this column (e.g. in where or […]