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What Oracle performance tuning tools can and can't do for DBAs

Database performance management is one of the more time-consuming tasks that Oracle database administrators face. But for DBAs, properly tuning databases and then monitoring query ... the top SQL stat... read more

sqlfmt: An [Opinionated] Online SQL Formatter

sqlfmt is an online SQL formatter ... the first page of results with the query SELECT 1, 2, and all six of them formatted it onto two or three lines. While I understand why they do that, I ... read more

Basic Administration Tasks - Level 5 of the Stairway to for Azure SQL Database

You will find the option to do this in the main overview page for your ... level using SQL Server Management Studio (SSMS) but this time make sure that you are under the context of the user database, ... read more

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Oracle JET and Oracle Database – a Beautiful Combination

As you can see in the above figure, an Oracle JET application interacting with an Oracle database calls a Web service, making a HTTP request to it. The Web service transforms the URL into an SQL query ... read more

6 best practices on Oracle performance monitoring and tuning

A proactive strategy might, for example ... a significant portion of all Oracle performance problems. For this reason, Oracle performance monitoring and management efforts should carefully assess and ... read more

Sorting with DISTINCT and UNION

Some SQL users automatically throw a DISTINCT into every query (Figure 6–17). Don't do ... example. In this case, the two queries actually produce the same results. You see differences only if the UNI... read more

Demo: Oracle Database Continuous Query Notification in Node.js

Native Oracle Database Continuous Query ... a web page with a message notification area that always shows the five most recent messages in a database table. The messages are being inserted into that t... read more

How security flaws work: SQL injection

Love is accused of participating in the #OpLastResort initiative through SQL injection ... because the query was often written to take one or more parameters, the data shown on that page could change ... read more

How to Run Scheduled Jobs in Azure SQL Databases

As you may know, Azure SQL Databases do ... example, we are using a folder named scripts. You can use any folder of your preference. Just make sure that the SQL Agent account or the Proxy account have ... read more

Cybersecurity Basics: The OWASP Top 10 Critical Web Application Security Risks

The simplest example of injection may be the curious case of Christopher Null, a Wired reporter whose last name makes it impossible for him to input his name into some online forms. Unsurprisingly, th... read more

An Introduction to SQL

Structured Query ... to use SQL, you can apply this knowledge to MS SQL Server, DB2, Oracle, PostgreSQL, and countless other databases. SQL works with relational databases, which store data in objects ... read more

How to use the LEFT JOIN vs. RIGHT OUTER JOIN in SQL

To do ... query with many JOINs is taking a long time to execute on a large database, it might run faster if you change the sequence of JOINs in your SQL statement. You might have noticed that we used ... read more

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