The following rule indicates that the four variables given in the subscope should be deleted from the table sge_host_values after 7 days.
<delete scope="host_values" time_range="day" time_amount="7">
<sub_scope>np_load_avg</sub_scope>
<sub_scope>cpu</sub_scope>
<sub_scope>mem_free</sub_scope>
<sub_scope>virtual_free</sub_scope>
</delete>
The following rule says to delete all variables from the table sge_host_values after 2 years.
<delete scope="host_values" time_range="year" time_amount="2"/>
The following rule says to delete all records for user fred after 1 month
<delete scope="share_log" time_range="month" time_amount="1">
<sub_scope>fred</sub_scope>
</delete>