PlSql query required

Question

Hello All,
I have one requirement like below. I've written a StoredProcedure which has i/p parameter as segment_id
I have two tables T1 and T2
T1--> line_id,ssection_id,cat_id
T2--> parent_id,child_id, segment1,segment2,segment3
parent_id is equivalent to ssection_id and child_id is equivalent to cat_id. I've made a inner join with thise condition.
Now, what I need to achieve is, depending upon the segment_id i/p parameter i need to check teh data of table T2. for example say, segment_id is segment1 then i have to check the data in segment1 column and if it is N then I should fetch the line_id from table T1.
SELECT lines.line_id
BULK COLLECT INTO line_ids
FROM T1 lines inner join T2 iv
ON LINES.SSECTION_ID = iv.Parent_id
AND lines.cat_id = iv.child_id
WHERE
Here I need to write the condition that I've explained above. Please forgive me if it is a lame question to ask as I'm very much new to Oracle world. Please let me know if you need any further information. Thanks in advance.
Regards,
Subhadeep

Answer 1

I figured out the query, Thanks a lot for your help.
AND 'N' = CASE i/pparameter segment
WHEN 'segment1' THEN
iv.segment1
WHEN 'segment2' THEN
iv.segment2
WHEN 'segment3' THEN
iv.segment3
END ;
the whole query looks like this.
SELECT lines.line_id
BULK COLLECT INTO line_ids
FROM T1 lines , T2 iv
WHERE lines.deal_site_id = p_deal_site_id -- i/p parameter
AND LINES.SSECTION_ID = iv.Parent_id
AND lines.cat_id = iv.child_id
AND 'N' = CASE p_segment_id -- segment i/p parameter
WHEN 'segment1' THEN
iv.segment1
WHEN 'segment2' THEN
iv.segment2
WHEN 'segment3' THEN
iv.segment3
END ;
Hope it helps some one who is facing similar problem.
Regards,
Subhadeep