寫在前面：其實sqlplus也是很好的工具，只是sqldeveloper可以讓我們更直觀，當然還有很多工具，比如說PL/SQL等等
sqldeveloper也是位於開始菜單中Oracle選項下的，具體位置見下圖：
直接打開實際上是打不開的，會有下面出現的問題：
解決辦法非常簡單，點擊“瀏覽”，然後定位到這你的Oracle數據庫安裝路徑
C:\app\oracle\product\11.2.0\dbhome_1\sqldeveloper\sqldeveloper\bin你可能與我的Oracle數據庫安裝位置有所差別，但是Oracle文件路徑是一致的。
然後找到這個，並打開
緊接着會提示你這個：
這是因爲這個工具是基於jdk 32位的，所以需要jdk32位的環境
點擊“Browse”去找到jdk32位的安裝包
一般情況下到這裏就可以直接打開了，但是筆者的環境還有點問題，出現了這個錯誤：
通過Google迅速找到了這樣的一個鏈接：
https://stackoverflow.com/questions/22929702/oracle-sql-developer-msvcr100-dll-is-missing-from-your-computer
然後照着這個的回答就可以完美解決了
These information is specified in ORACLE_HOME\sqldeveloper\releasenotes . So install the jdk1.6 and make the sqldeveloper.conf SetJavaHome point to this.
other workaround is go to jdk1.7.0 installed path jdk1.7.0\jre\bin copy msvcr100.dll and paste it into ORACLE_HOME\sqldeveloper\sqldeveloper\bin and again try start SQL Developer. It will start.
And The file is from
This file was downloaded from: http://www.dll-files.com
If you downloaded it from somewhere else, please let us know: http://www.dll-files.com/contact.php
Installation instructions:
Extract the .dll file from .zip file. We recommend that you extract the .dll to the installation directory of the program that is requesting the .dll.
If that doesn’t work, you will have to extract the .dll to your system directory. By default, this is:
C:\Windows\System (Windows 95/98/Me)
C:\WINNT\System32 (Windows NT/2000)
C:\Windows\System32 (Windows XP, Vista, 7, win 8)
If you use a 64-bit version of Windows, you should also place the .dll in C:\Windows\SysWOW64\ > Make sure to overwrite any existing files (but make a backup copy of the original file for safety). Reboot your computer.
If the problem still occurs, try the following:
Open Windows Start menu and select “Run…”.
Type CMD and press Enter (or if you use Windows ME, type COMMAND)).
Type regsvr32 .dll and press Enter.
If you have any other problems, see our HELP-section at www.dll-files.com/support/
另外如果遇到無法加載jvm.dll這個文件的錯誤，請檢查環境變量配置。