Deleteing 110 million records..!!!!!!!1

Question

I have got a table which has 120 million records out of which only 10 million records are usefull. Now I want to delete the remaining 110 million records with the where condition. I spoke to my DBA and he said this has it will take around 2 weeks or more time for this task but I need to get this done quickly as this thing has been effecting oue daily rollup process for the generation of alerts for a high priority applications
i want delete based on this condition
delete from tabA where colA=0.
Any kind of help is highly appreciated.
Oracle Version:11g

Answer 1

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3.) insert /*+ append */ into taba select * from taba_temp;
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That's the 'old' way that should be used ONLY if OP does not have the partitioning option licensed.
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1.) create table taba_temp as select * from taba where cola != 0;
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That 'temp' table should be created in the desired tablespace as a RANGE partitioned table with one partition: VALUES LESS THAN (MAXVALUE)
Then step 3 can just do 'ALTER TABLE EXCHANGE PARTITION' to swap the data in. That is metadata only operation and takes a fraction of a second.
No need to query the data again.
DROP TABLE EMP_COPY
CREATE TABLE EMP_COPY AS SELECT * FROM EMP;  -- this is a copy of emp and acts as the MAIN table that we want to keep
drop table emp_temp
-- create a partitioned temp table with the same structure as the actual table
-- we only want to keep emp records for deptno = 20 for this example
CREATE TABLE EMP_TEMP 
PARTITION BY RANGE (empno)
(partition ALL_DATA values less than (MAXVALUE)
AS SELECT * FROM EMP_COPY WHERE DEPTNO = 20
-- truncate our 'real' table - very fast
TRUNCATE TABLE EMP_COPY
-- swap in the 'deptno=20' data from the temp table - very fast
ALTER TABLE EMP_TEMP EXCHANGE PARTITION ALL_DATA WITH TABLE EMP_COPY