Download Sql Developer 21.4.3 -

Water analysis and diagnosis via smartphone: Simple and reliable monitoring of freshwater values. Determination of: Total hardness, carbonate hardness, pH value, nitrite, nitrate, chlorine and CO2 calculation.
Item no. 2542000
Operating instructions

28.62 EUR

Price incl. 25 VAT plus Delivery
Out of stock - Available again soon
Shop locator

Product features

  • Water analysis and diagnosis via smartphone: easy and safe monitoring of the water values in freshwater aquariums. Determination of: general hardness, carbonate hardness, pH value, nitrite, nitrate, chlorine and CO2 calculation
  • The new generation of water analysis: download ProScan app free of charge, insert test strip into water, position strip on colour chart for analysis, scan colour chart, values are determined
  • Fast diagnosis – precise results: test value results are displayed as numbers and additionally evaluated (good/medium/poor). Additional recommendations for optimal values in freshwater aquariums and ponds
  • Compatible with iPhone and iPad: requires iOS 13.0 or later, Android version 10.0 or higher, and a camera with auto focus.
  • Contents: 24 water analysis strips, 1 ProScan colour chart, 1 ProScan app for free download
Your opinion is important to us
specialist dealers near you
Sustainability at JBL
Download catalogue

Information and consent to cookies & third-party content

We use technically necessary cookies/tools to offer, operate and secure this service. Furthermore ,with your express consent , we use cookies/tools for marketing, tracking, creating personalised content on third-party sites and for displaying third-party content on our website. You can revoke your consent at any time with effect for the future via the menu item ‘Cookie settings’.
By clicking on ‘Allow all’, you give us your express consent to the use of cookies/tools to improve the quality and performance of our service, for functional and personalised performance optimisation, to measure the effectiveness of our ads or campaigns, for personalised content for marketing purposes, including outside our website. This enables us to provide personalised online ads and extended analysis options about your user behaviour. This also includes accessing and storing data on your device. You can revoke your consent at any time with effect for the future via the menu item ‘Cookie settings’.
You can use the ‘Change settings’ button to grant and revoke individual consent to the cookies/tools and receive further information on the cookies/tools we use, their purposes and duration.
By clicking on ‘Only absolutely necessary’, only technically necessary cookies/tools are used.

Our data protection declaration tells you how we process personal data and what purposes we use the data processing for.

Change settings
Only absolutely necessary
Allow all

Cookie settings

Show history Close history
Cancel Save

PUSH messages from JBL

Download Sql Developer 21.4.3 -

Another compelling reason to target version 21.4.3 is compatibility with specific Oracle Database versions. While Oracle prides itself on backward compatibility, there are golden pairings where a particular SQL Developer version works most seamlessly with a particular database version (e.g., Oracle 19c or 12.2). Version 21.4.3 is widely recognized in technical forums and Oracle communities as a reliable companion for databases in the 19c and 21c families. Developers who have automated scripts, custom reports, or third-party extensions built around the API of this version are often reluctant to upgrade, as a newer version could break these dependencies. Thus, the act of downloading 21.4.3 becomes an act of preserving a validated technical environment.

In conclusion, the specific request to download SQL Developer 21.4.3 is a testament to the pragmatic wisdom of IT professionals. It reflects a conscious choice for stability over novelty, compatibility over hype, and control over automatic updates. While Oracle continues to innovate with newer versions that support autonomous database features and cloud integrations, version 21.4.3 remains a reliable workhorse for day-to-day SQL querying, PL/SQL debugging, data modeling, and report generation. By knowing how to locate and deploy this specific version, a developer ensures they have a powerful, predictable tool that gets the job done without unnecessary surprises. Sometimes, the best version is not the newest—it is the one you can trust. download sql developer 21.4.3

First and foremost, understanding the context of version 21.4.3 is crucial. Released in late 2021, this version represents a mature point in Oracle’s quarterly release cycle for SQL Developer. Unlike major version jumps that might introduce radical UI overhauls or experimental features, a .4.3 patch release is typically a culmination of bug fixes, performance optimizations, and security patches applied to a stable base. For organizations bound by strict change management policies or those supporting legacy applications, this version provides a "known quantity." It has been tested in production environments for months, its quirks are documented, and its behavior is predictable. Downloading this specific version avoids the risk of encountering unvetted features or workflow disruptions that can accompany a brand-new release. Another compelling reason to target version 21

In the rapidly evolving landscape of database management, where new versions of software are released with dizzying frequency, the instinct is often to always seek the latest iteration. However, for many database administrators, developers, and data analysts, the latest is not always the greatest. Stability, compatibility, and specific feature sets often outweigh the allure of cutting-edge updates. This is precisely the rationale behind the specific search query: “download SQL Developer 21.4.3.” This request is not a plea for an outdated tool but a calculated decision to acquire a proven, stable, and highly functional version of Oracle’s flagship free database IDE. Developers who have automated scripts, custom reports, or

The practical process of obtaining this version, however, requires a strategic approach. Unlike the prominent “Download Now” button for the latest release, older versions are tucked away on Oracle’s “OTN Archives” or the “Releases” page. A direct web search for the exact filename, such as sqldeveloper-21.4.3.063.1748-x64.zip , is more effective than navigating the main product page. Users must be prepared to accept the Oracle Technology Network License Agreement, which is standard for all free downloads. It is also wise to verify the checksum (MD5 or SHA) provided on the download page to ensure the file’s integrity, as older versions can sometimes be targets for mirroring on insecure third-party sites. Once downloaded, the beauty of SQL Developer 21.4.3 shines: it requires no formal installation, as it is a Java-based application that runs from an extracted folder, preserving system integrity and allowing multiple versions to coexist on the same machine.