1): Insert Statement    http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_dml_insert.htm|StartTopic=Content%2Fapex_dml_insert.htm|SkinName=webhelp

2): Update Statement   http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_dml_update.htm|StartTopic=Content%2Fapex_dml_update.htm|SkinName=webhelp

3): Upsert Statement   http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_dml_upsert.htm|StartTopic=Content%2Fapex_dml_upsert.htm|SkinName=webhelp

4): Delete Statement   http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_dml_delete.htm|StartTopic=Content%2Fapex_dml_delete.htm|SkinName=webhelp

5): Undelete Statement   http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_dml_undelete.htm|StartTopic=Content%2Fapex_dml_undelete.htm|SkinName=webhelp

6): Merge Statement   http://www.salesforce.com/us/developer/docs/apexcode/index_Left.htm#CSHID=apex_dml_merge.htm|StartTopic=Content%2Fapex_dml_merge.htm|SkinName=webhelp

7): Query Statement   http://www.salesforce.com/us/developer/docs/apexcode/Content/langCon_apex_SOQL.htm