Oracle joining tables using WITH clause with SPLIT [duplicate] - sql

Question

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How to split a varchar column as multiple values in SQL?
(2 answers)
Closed 1 year ago.
I have this table that is not linked to another table, because they don't have any same column. Now they want a report that will link both tables.
But the problem is the only common column to them is the WAFER_INFO column which has multiple values separated by a comma that is why I need to split them to make multiple records but different WAFER_INFO.
First Table
select wafer_info
from bondertab_g3
where tha_reel_id='TGDT349028H'
order by insert_dm,tha_reel_id,processlk_ky
Results for the query above
TGK343067-22,TGK343067-25,TGK343067-24,TGK343067-23
Second Table
select hp_part_nr,wafer_id,good_cnt,total_rej_cnt,processlk_ky,toollk_ky,toolnrlk_ky,materiallk_ky
from sawinsptab
where wafer_id ='TGK343067-22';
select hp_part_nr,wafer_id,good_cnt,total_rej_cnt,processlk_ky,toollk_ky,toolnrlk_ky,materiallk_ky
from sawinsptab
where wafer_id ='TGK343067-25';
select hp_part_nr,wafer_id,good_cnt,total_rej_cnt,processlk_ky,toollk_ky,toolnrlk_ky,materiallk_ky
from sawinsptab
where wafer_id ='TGK343067-24';
select hp_part_nr,wafer_id,good_cnt,total_rej_cnt,processlk_ky,toollk_ky,toolnrlk_ky,materiallk_ky
from sawinsptab
where wafer_id ='TGK343067-23';
Basically just all of them in the first table
I already achieve on how to split all those records using this code
With DATA AS (
select tha_reel_id, wafer_info str
from bondertab_g3
where tha_reel_id='TGDT349028H'
)
SELECT A.tha_reel_id, trim(regexp_substr(A.str, '[^,]+', 1, LEVEL)) WAFERID FROM DATA A
CONNECT BY instr(str, ',', 1, LEVEL - 1) > 0
Now my question is how can I connect my above query and connect it to the Second Table when the only column same is the WAFERID

Answer 1

Find where the sawinsptab.wafer_id (wrapped in your comma delimiters) is a sub-string of bondertab_g3.wafer_info (wrapped in your comma delimiters):
select hp_part_nr,
wafer_id,
good_cnt,
total_rej_cnt,
processlk_ky,
toollk_ky,
toolnrlk_ky,
materiallk_ky
from sawinsptab s
where EXISTS (
select 1
from bondertab_g3 b
where b.tha_reel_id='TGDT349028H'
and ','||b.wafer_info||',' LIKE '%,'||s.wafer_id||',%'
);
or
select s.hp_part_nr,
s.wafer_id,
s.good_cnt,
s.total_rej_cnt,
s.processlk_ky,
s.toollk_ky,
s.toolnrlk_ky,
s.materiallk_ky,
b.other_column
from sawinsptab s
INNER JOIN bondertab_g3 b
ON ( ','||b.wafer_info||',' LIKE '%,'||s.wafer_id||',%' )
where b.tha_reel_id='TGDT349028H';
or, if you need to use an index on wafer_id and want to split the delimited string then, you can do it with a recursive sub-query factoring clause and simple string functions (rather than slow regular expressions):
select hp_part_nr,
wafer_id,
good_cnt,
total_rej_cnt,
processlk_ky,
toollk_ky,
toolnrlk_ky,
materiallk_ky
from sawinsptab s
where wafer_id IN (
WITH delimiter_bounds ( wafer_info, startidx, endidx ) AS (
SELECT wafer_info,
1,
INSTR( wafer_info, ',', 1 )
FROM bondertab_g3
WHERE tha_reel_id='TGDT349028H'
UNION ALL
SELECT wafer_info,
endidx + 1,
INSTR( wafer_info, ',', endidx + 1 )
FROM delimiter_bounds
WHERE endidx > 0
)
SELECT CASE
WHEN endidx = 0
THEN SUBSTR( wafer_info, startidx )
ELSE SUBSTR( wafer_info, startidx, endidx - startidx )
END
from delimiter_bounds
);
or
WITH delimiter_bounds ( wafer_info, other_column, startidx, endidx ) AS (
SELECT wafer_info,
other_column,
1,
INSTR( wafer_info, ',', 1 )
FROM bondertab_g3
WHERE tha_reel_id='TGDT349028H'
UNION ALL
SELECT wafer_info,
other_column,
endidx + 1,
INSTR( wafer_info, ',', endidx + 1 )
FROM delimiter_bounds
WHERE endidx > 0
)
select s.hp_part_nr,
s.wafer_id,
s.good_cnt,
s.total_rej_cnt,
s.processlk_ky,
s.toollk_ky,
s.toolnrlk_ky,
s.materiallk_ky,
b.other_column
from sawinsptab s
INNER JOIN (
SELECT CASE
WHEN endidx = 0
THEN SUBSTR( wafer_info, startidx )
ELSE SUBSTR( wafer_info, startidx, endidx - startidx )
END AS wafer_id,
other_column
FROM delimiter_bounds
) b
ON ( s.wafer_id = b.wafer_id )

Answer 2

You can change the first query to a CTE and then use that directly in your query:
with data as (
select tha_reel_id, wafer_info str
from bondertab_g3
where tha_reel_id = 'TGDT349028H'
),
wafers as (
select d.tha_reel_id, trim(regexp_substr(d.str, '[^,]+', 1, LEVEL)) as waferid
from data d
connect by instr(str, ',', 1, LEVEL - 1) > 0
)
select s.*
from sawinsptab s
where wafer_id in (select w.waferid from wafers);