Database Journal

Is COUNT(rowid) Faster Than COUNT(*)?: It is believed that count(*) expands to all columns and that count(rowid) is faster.  Read on to see why the opposite might be true. http://dlvr.it/RWtWXN pic.twitter.com/cTVYut874e

How Many Databases Can You Name?: There is a huge number of databases available. How many could you name? Create our list and then compare to our list of well over 100 databases! http://dlvr.it/RWR4bV pic.twitter.com/1pjLRmP04W

How to Find the Estimation Cost for a Query: Discover how to estimate the cost of a query. Read on to see an example of how to extract the Estimated Cost for execution plans stored in the procedure cache.   http://dlvr.it/RVzvYz pic.twitter.com/tW3t66MCBF

Understanding Views in SQL: Learn about the concept of views in SQL, and how they work. Read on to see clear examples of how to implement views. http://dlvr.it/RVYC6L pic.twitter.com/CbftDruZS6

Introduction to Azure SQL Database Instance Pools: Learn about Azure SQL Database Instance Pools and how they they set to provide more flexibility and agility than other Platform-as-a Service SQL Server-based offerings in Azure. http://dlvr.it/RV6YWC pic.twitter.com/B6pZAGmInt

A Look at the Oracle Group-by Bug: In Oracle 12.2 and later a group-by elimination enhancement can produce wrong results. Read on to see what can be returned and how to work around it. http://dlvr.it/RThlD2 pic.twitter.com/Ey5DHDadRI

Creating or Altering an Objects with a Single Statement: Do you get tired of having your CREATE PROCEDURE statement failing if the stored procedure already exists? Read on to learn a better solution for avoiding this.  http://dlvr.it/RTGxwz pic.twitter.com/m83fnQGnJO

Working with SQL Cursors: In SQL cursors serve as a pointer that enables application programming language to deal with query results one row at a time. Read on to explores the concept behind and learn how to declare cursors, open, retrieve data from… http://dlvr.it/RSPvBR pic.twitter.com/vfos1DVh0k

Connecting to a MySQL Database in .NET: Learn how to connect to a MySQL database from a .NET application. http://dlvr.it/RRzzPy pic.twitter.com/GSA1No5ikO

Adding Data to a Cloud Firestore Database: Learn how to add data to a NoSQL Cloud-based database (Firebase Firestore) from a simple web application. http://dlvr.it/RRhC7R pic.twitter.com/46pNVWxHoY

Introduction to Firebase: If you are doing a mobile or web-based app that need scalable access to a scalable, multi-user Cloud-based database that includes analytics and other features, then Firebase is worth taking a look. Read on to learn about the… http://dlvr.it/RRXvzM pic.twitter.com/kX0EOT1UOA

Verifying Object Exists and Dropping Object with One Statement: Discover how to do both in one SQL Server statement: Verify that a SQL Server object exists and drop the object. http://dlvr.it/RR4zPw pic.twitter.com/flCH1ttKZb

Addressing the Drop Column Bug in Oracle 18c and 19c: The latest two versions of Oracle can throw an error when columns are set as unused and then dropped. Learn about this issue and how to address it. http://dlvr.it/RQdxXL pic.twitter.com/P8HRPwDHon

Introduction to Azure SQL Database Auto-Failover Groups: Auto-Failover Groups addresses several limitations that were in the Azure SQL Database. Read on to learn more! http://dlvr.it/RQBph8 pic.twitter.com/Zv05I3NP8j

How do OODBMS and ORDBMS Differ from RDBMS?: Get a high-level understanding of how object-relational and object-oriented database management systems differ from traditional relational database management systems. http://dlvr.it/RPml8P pic.twitter.com/OgFQdh4LqT

The New SQL Server Approximate Count Distinct Function: With the introduction of SQL Server 2019, Microsoft introduced a new method to count distinct values that can be faster and uses less resources. Read on to learn more! http://dlvr.it/RPHb8V pic.twitter.com/9QNZcR7nGW

Understanding Query Execution in Relational Database System Architecture: What happens behind the scene in a modern relational database management system when a user submits a query until the result is obtained from the database? Read on to learn more! http://dlvr.it/RNqqzR pic.twitter.com/tM9SkGfW2U

Running Database Console Commands (DBCCs) on Azure SQL Database: Discover the primary characteristics of Database Console Commands (DBCCs) on Azure SQL Database and explore their role in Database-as-a-Service scenarios. http://dlvr.it/RNNs6N pic.twitter.com/xDl7OFKdNI

Using Oracle EXPAND_SQL_TEXT: Database tables are not static entities and sometimes changes can wreak havoc on packages and procedures.  Read on to see how Oracle's expand_sql_text can help solve such issues. http://dlvr.it/RMzDDZ pic.twitter.com/ec9qEhQdWn