Download ((new)) Sql Developer 21.4.3 100%

Complete Guide: Download SQL Developer 21.4.3 Oracle SQL Developer 21.4.3, released in April 2022, remains a highly stable and popular choice for developers working with Oracle Database 21c and earlier. This maintenance release focused on performance improvements and critical security updates. 1. Direct Download Options

You can access the official download files through the Oracle SQL Developer Downloads Archive. Download Type Recommendation Windows 64-bit With JDK 8 Included

Best for most users. Includes everything needed to run the app immediately. Windows 32/64-bit No JDK Included

Smaller file size, but requires you to have Oracle JDK 8 or 11 already installed. macOS Includes JDK 17

Standard package for Mac users; no separate Java installation needed for recent builds. Linux RPM/No JDK

Ideal for Red Hat/Oracle Linux. Requires separate JDK 8 or 11 installation. 2. System Requirements

Before downloading, ensure your system meets these minimum specifications: How to install SQL Developer 21.4 on Windows 10/11 download sql developer 21.4.3

Oracle SQL Developer version 21.4.3 is a critical maintenance update released in March 2022 to address specific performance and security issues found in the 21.4 series. Key Fixes in 21.4.3

The primary reason to download this specific version was to resolve two significant issues:

Performance Restoration: Fixed a bug where SQL Developer would execute REGEDIT on Windows to find ORACLE_HOME locations, causing massive slowdowns for queries and scripts.

Security Update: Updated the Log4J library (matching the 2.17.1 version) to address vulnerabilities that were a major industry concern during its release. How to Download and Install

Official Source: Download the installation package directly from the Oracle SQL Developer 21.4.3 Archive Page.

JDK Requirements: This version requires Java 8 or 11 (minimum 1.8 update 171). Complete Guide: Download SQL Developer 21

Windows: Choose the "Windows 64-bit with JDK 8 included" bundle for a simpler setup.

Mac/Linux: You must have a compatible JDK pre-installed. For Mac, download the OS X distribution, which is digitally signed for modern macOS security.

Clean Installation: It is highly recommended to unzip the file into a fresh, empty folder rather than over-installing on an old version. Pro-Tips for 21.4.3

Environment Variables: If you previously added an $ORACLE_HOME environment variable as a workaround for performance issues in 21.4.2, this fix in 21.4.3 makes that variable optional again.

Connection Compatibility: This version supports Oracle Database 19c and higher for OCI "Thick" connections.

Troubleshooting: If the application fails to open on Windows, clearing the system21.4.3 folder in your AppData\Roaming directory often fixes corrupted configuration states. For Linux (Ubuntu / RHEL)

For Linux (Ubuntu / RHEL)

Unzip:

unzip sqldeveloper-21.4.3-063.0637-linux-x64.zip -d /opt/sqldeveloper/

Set Java home:

export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64

Run the launcher:
```
/opt/sqldeveloper/sqldeveloper.sh
```
Create desktop entry: Use sqldeveloper.desktop template.

Option 2: My Oracle Support (For Patches)

If you need the exact build with a specific patch number:

Log into My Oracle Support.
Go to the Patches & Updates tab.
Search for “SQL Developer 21.4.3”.
Download the patch ZIP file. (You will need a valid Oracle support contract for this method).

2. Oracle Software Delivery Cloud (formerly E-Delivery)

For users with Oracle Support accounts, this offers verified older builds.

4. Installation Procedures

4.1 Windows Installation

Locate the downloaded archive (e.g., sqldeveloper-21.4.3.017.0006-x64.zip).
Use a decompression utility (such as 7-Zip or WinZip) to extract the contents. Note: It is highly recommended to extract the folder to a directory with write permissions (e.g., C:\Program Files or C:\Tools) rather than running it directly from the Downloads folder.
Navigate to the extracted sqldeveloper folder.
Execute sqldeveloper.exe.
If the "Without JDK" version was downloaded, the application will prompt for the location of the java.exe binary upon first launch.

4.2 macOS Installation

Download the macOS specific archive.
Extract the contents.
Drag the SQLDeveloper.app bundle to the /Applications directory.
Launch via the Launchpad or Applications folder. As macOS has strict security protocols, users may need to allow the application to run via System Preferences > Security & Privacy > General if an "unidentified developer" warning appears.

4.3 Linux Installation

Download the "Other Platforms" zip file.
Open a terminal and navigate to the download location.
Unzip the archive:
```
unzip sqldeveloper-21.4.3-no-jre.zip
```
Navigate to the directory and run the launcher script:
```
cd sqldeveloper
./sqldeveloper.sh
```
Ensure the JAVA_HOME environment variable is set correctly in the shell profile if using the non-JDK package.

Step 4 — Install or extract

Windows EXE or MSI: Run installer and follow prompts. If the package doesn’t include JDK, point the installer to your installed JDK path when requested.
Zip/tar.gz: Extract to a suitable directory. For Linux, you may need to set executable permissions on the sqldeveloper scripts.
macOS dmg: Open the DMG and drag SQL Developer to Applications (if provided).

Should You Upgrade or Stick with 21.4.3?

Stick with 21.4.3 if: You are working on a project locked to Java 11, you require a specific patch, or your DBA team has not validated newer releases.
Upgrade if: You need JSON Duality Views, private database links in the cloud, or the new MongoDB Worksheet.

Problem: Connections fail with "IO Error: Network adapter could not establish the connection"

Cause: Firewall or listener configuration.
Fix: Ensure your Oracle listener is running and port 1521 is open.

“Why can’t I find 21.4.3 on the main page?”

Oracle promotes the latest version (currently 23.x or 24.x). You must use the “Previous Releases” link or change the URL manually (e.g., replace “latest” with “21.4.3” in the download path).