A short time ago, we explored Some SELECT Queries You Must Know. These included determining the lowest and highest value for a column, as well as grouping results by category. Today's blog presents a couple more queries, along with a tip to make your queries almost write themselves!
Many database management and development tools support multiple connections to homogeneous databases, i.e., where they are all of the same type, ALL MySQL, ALL SQL Server, ALL Oracle, etc. On the other hand, very few support heterogeneous database servers, i.e. MySQL AND SQL Server AND Oracle, etc. Don't believe me? Just google it!
With Master-Slave topologies and modern practices such as Database sharding becoming increasingly ubiquitous, database administrators (DBAs) and developers are working with multiple databases more than ever before. Doing so is made a lot easier by software that can accommodate multiple database connections.
The Some SELECT Queries You Must Know blog presented a couple of the most important queries to know, along with some examples. Continuing with that theme, today's blog focuses on the invaluable BETWEEN operator.
Data is a core part of many businesses both big and small. For example, Facebook stores each user's profile information, including data about their friends and posts within a database system. SQL (short for Structured Query Language) is the programming language that enables developers and database administrators to work with that data.
There are a few frequently used SQL commands you should be familiar with for database work. Not including Data Definition Languages (DDL) or Data Manipulation Language (DML) statements, SQL commands include those to fetch data from tables and views using the SELECT statement. Today's blog will present a couple of the most important queries to know, along with some examples using Navicat Premium as the database client.
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