Database management

Master Data Services installation for SQL Server 2012

This posting is a tutorial for installing Master Data Services on your Windows Server 2012. Microsoft SQL Server Master Data Services (MDS) is a Master Management product from Microsoft, code-named Bulldog. It is the rebranding of the Stratature MDM(…)

Partial Join Evaluation in Oracle 12c

By Franck Pachot . Do you think that it’s better to write semi-join SQL statements with IN(), EXISTS(), or to do a JOIN? Usually, the optimizer will evaluate the cost and do the transformation for you. And in this(…)

SQL Server 2014: Are DENY ‘SELECT ALL USERS SECURABLES’ permissions sufficient for DBAs?

SQL Server 2014 improves the segregation of duties by implementing new server permissions. The most important is the SELECT ALL USERS SECURABLES permission that will help to restrict database administrators from viewing data in all databases. My article is(…)

Oracle Parallel Query: Did you use MapReduce for years without knowing it?

By Franck Pachot . I’ve read this morning that MapReduce is dead. The first time I heard about MapReduce was when a software architect proposed to stop writing SQL on Oracle Database and replace it with MapReduce processing.

SQL Server: How to find the default data path?

I have read a lot of SQL Server blog postings and articles in order to find the default data path. This post covers different SQL Server versions (SQL Server 2012, SQL Server 2014, SQL Server 2008, SQL Server 2005)(…)

How to list all Oracle system schemas

By Franck Pachot . Do you want to know which users come with the Oracle Database and which are the ones you have created? This is that not easy, especially prior to Oracle 12c. You know SYS and SYSTEM,(…)

Oracle 12c extended datatypes better than CLOB?

By Franck Pachot . 12c has introduced character strings that can can go above 4000 bytes. In the previous versions, in PL/SQL only we were allowed to have VARCHAR2 up to 32k. In SQL the VARCHAR2 datatype was limited(…)

Check SQL Server Error Log size with a policy

In many blogs or articles, we can read that it is recommended to recycle the error log to be sure that the size is not too big In the Best Practice Analyzer (BPA) for SQL Server, this(…)

Oracle policy managed databases: Policies and policy sets

In this post, I will continue my experiments with Oracle policy managed databases with Grid Infrastructure, and present one of the new features introduced with Grid Infrastructure 12c last June: the cluster configuration policies and policy sets. It allows the(…)

Oracle SQL Monitoring reports in flash, html, text

By Franck Pachot . I have recently posted on the way I like to extract execution plans. When we have Tuning pack, I suggest to get them with SQL Real-Time Monitoring as an active report. However, Martin Preiss said(…)