how to install oepe in eclipse indigo for java ide ?

i m using eclipse ide can any 1 tell me how to install database in eclipse to develop applications ....i have sql server 5 installed on my machine ...can i use it or oracle provides database plugin for eclipse ....if yes then please tell me the ways how to install plugin in eclipse ?

i had tried to install oepe plugin but it gives me error every time i tried to install it
the error are as follow please tell me how to install it ?

Cannot complete the install because of a conflicting dependency.
  Software being installed: Oracle Enterprise Pack for Eclipse 1.7.2.201103302044 (oracle.eclipse.tools.helios.oepe.product.feature.group 1.7.2.201103302044)
  Software currently installed: Eclipse IDE for Java Developers 1.4.0.20110615-0550 (epp.package.java 1.4.0.20110615-0550)
  Only one of the following can be installed at once: 
    Apache Ant 1.8.2.v20110505-1300 (org.apache.ant 1.8.2.v20110505-1300)
    Apache Ant 1.7.1.v20100518-1145 (org.apache.ant 1.7.1.v20100518-1145)
  Cannot satisfy dependency:
    From: Eclipse IDE for Java Developers 1.4.0.20110615-0550 (epp.package.java 1.4.0.20110615-0550)
    To: org.eclipse.epp.package.java.feature.feature.group [1.4.0.20110615-0550]
  Cannot satisfy dependency:
    From: Oracle Enterprise Pack for Eclipse 1.7.2.201103302044 (oracle.eclipse.tools.helios.oepe.product.feature.group 1.7.2.201103302044)
    To: org.eclipse.platform.feature.group [3.6.0,3.7.0)
  Cannot satisfy dependency:
    From: EPP Java Package 1.4.0.20110615-0550 (org.eclipse.epp.package.java.feature.feature.group 1.4.0.20110615-0550)
    To: org.eclipse.platform.feature.group [3.7.0.v20110530-9gF7UHNFFt4cwE-pkZDJ7oz-mj4OSEIlu9SEv0f]
  Cannot satisfy dependency:
    From: Eclipse Platform 3.6.0.v20100602-9gF78GpqFt6trOGhL60z0oEx3fz-JKNwxPY (org.eclipse.platform.feature.group 3.6.0.v20100602-9gF78GpqFt6trOGhL60z0oEx3fz-JKNwxPY)
    To: org.apache.ant [1.7.1.v20100518-1145]
  Cannot satisfy dependency:
    From: Eclipse Platform 3.6.1.r361_v20100909-9gF78GrkFqw7GrsZnvz0JWNTeb6fue6896L (org.eclipse.platform.feature.group 3.6.1.r361_v20100909-9gF78GrkFqw7GrsZnvz0JWNTeb6fue6896L)
    To: org.apache.ant [1.7.1.v20100518-1145]
  Cannot satisfy dependency:
    From: Eclipse Platform 3.6.2.r362_v20110210-9gF78Gs1FrIGnHDHWkEcopoN8AmxeZflGDGKQi (org.eclipse.platform.feature.group 3.6.2.r362_v20110210-9gF78Gs1FrIGnHDHWkEcopoN8AmxeZflGDGKQi)
    To: org.apache.ant [1.7.1.v20100518-1145]
  Cannot satisfy dependency:
    From: Eclipse Platform 3.7.0.v20110530-9gF7UHNFFt4cwE-pkZDJ7oz-mj4OSEIlu9SEv0f (org.eclipse.platform.feature.group 3.7.0.v20110530-9gF7UHNFFt4cwE-pkZDJ7oz-mj4OSEIlu9SEv0f)
    To: org.apache.ant [1.8.2.v20110505-1300]

Please ask Eclipse questions in the IDE forum. I'll move the post for you.