How to reduce the column definition w/o losing the data in the columns?

I need to reduce a particular column definition of a table from varchar2(10) to varchar2(4), but there is already existing data inside this column. The max length of data in this column is only 2 chars, which is less than the new column length.
What commands/steps should I take to reduce the column definition successfully without losing the data in this column?

Unfortunately, there is no one step solution.
You can create a new table and insert into this table with the old table values
e.g.
Old_Table
fld1 varchar2(10)
New_Table
fld1 varchar2(4)
insert into new_Table (select * from Old_Table) ;
I need to reduce a particular column definition of a table from varchar2(10) to varchar2(4), but there is already existing data inside this column. The max length of data in this column is only 2 chars, which is less than the new column length.
What commands/steps should I take to reduce the column definition successfully without losing the data in this column?

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We have created query on Purchasing Cube 0PUR_C01 for
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In the above Query we have used the following things:
In Columns:
i) Exceptional aggregation for maximum & minimum PO Net Price using reference characteristic as Calendar Day.
ii) Minimum PO Price value we have multiplied with Actual GR Quantity for the calculation of Impact of Lowest PO Net Price.
iii) Number of vendors calculated key figure.
In Rows:i)     Only Material
In Filters:
i)     Plant with variable select Option u2013 Optional.
ii)     Calendar Year / Month with Select Option u2013 Optional.
iii)     Material with excluded Unassigned (#).
iv)     Vendor with excluded Unassigned (#).
Following are we have used for Performance:
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ii)     Partitioning on Calendar Year / Month (For 1 year 14 partitions) i.e. (04.2007 to 03.2008).
iii)      Collapse.
iv)     In RSRT we have set the following properties
Read Mode = H
Req.Status = 0
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ii)     Calendar Year / Month 04.2007 to 03.2008.
So please suggest me how to reduce the execution time.
please help me.
Thanks,
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Hi,
First of all its a complete question with all the details. Good work.
As you partitioned the cube based on calmonth and you are also giving calmonth in selection, it will definitely work towards improved query performance.
As you are putting plant values in the selection, is there any aggregate available on plant characteristics? If not creating a aggregate on plant will help.
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Hi!
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Yes, I read. It does not solve the problem about which I write. I guess that solves your opinion? Please hint.

How to reduce the size of the query

Hi all,
Can any one suggest me how to reduce the size of the following query .
/* Formatted on 2011/07/12 11:02 (Formatter Plus v4.8.8) */
SELECT prs.pa_rqst_srvc_sid,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5031'
AND ped.aaa_segment_loop_nmbr = '2000F') revenue_iid,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5013'
AND ped.aaa_segment_loop_nmbr = '2000F') x12_code_list_qlfr_lkpcd,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5026'
AND ped.aaa_segment_loop_nmbr = '2000F') procedure_iid,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5027'
AND ped.aaa_segment_loop_nmbr = '2000F') mdfr_code,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5028'
AND ped.aaa_segment_loop_nmbr = '2000F') mdfr2_code,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5029'
AND ped.aaa_segment_loop_nmbr = '2000F') mdfr3_code,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5030'
AND ped.aaa_segment_loop_nmbr = '2000F') mdfr4_code,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5014'
AND ped.aaa_segment_loop_nmbr = '2000F') rqst_prcdr_amt,
(SELECT prpre.erroneous_data_value
FROM pa_error pe,
pa_error_detail ped,
pa_request_procedure_run_error prpre
WHERE pe.pa_error_sid = ped.pa_error_sid
AND ped.pa_error_sid = prpre.pa_error_sid
AND ped.oprtnl_flag = 'A'
AND prpre.oprtnl_flag = 'A'
AND prpre.pa_rqst_prcdr_sid = prp.pa_rqst_prcdr_sid
AND pe.pa_error_nmbr = '5015'
AND ped.aaa_segment_loop_nmbr = '2000F') srvc_line_rate,
'NA' drug_desc, 'NA' product_service_id, 'NA' uom_code,
'NA' rqst_prcdr_units
FROM pa_transaction_request ptr,
input_acknwldgmnt ia,
input_batch_file ibf,
pa_request pr,
pa_request_service prs,
pa_request_procedure prp
WHERE ptr.input_acknwldgmnt_sid = ia.input_acknwldgmnt_sid
AND ia.input_batch_file_sid = ibf.input_batch_file_sid
AND ptr.pa_trnsctn_rqst_sid = pr.pa_trnsctn_rqst_sid
AND pr.pa_rqst_sid = prs.pa_rqst_sid
AND prs.pa_rqst_srvc_sid = prp.pa_rqst_srvc_sid
AND pr.oprtnl_flag = 'A'
AND prs.oprtnl_flag = 'A'
AND ptr.oprtnl_flag = 'A'
AND prp.oprtnl_flag = 'A'
AND prs.rqst_ctgry_lkpcd = 'AR'
AND ibf.original_file_name = 'HIPAA.165760000.20110613I001.278_IRej.dat';
Thanks,
P Prakash

Hi,
Maybe like that, but keep in mind that it is highly untested_ :SELECT
prs.pa_rqst_srvc_sid,
pvt.c5031 revenue_iid,
pvt.c5013 x12_code_list_qlfr_lkpcd,
pvt.c5026 procedure_iid,
pvt.c5027 mdfr_code,
pvt.c5028 mdfr2_code,
pvt.c5029 mdfr3_code,
pvt.c5030 mdfr4_code,
pvt.c5014 rqst_prcdr_amt,
pvt.c5015 srvc_line_rate,
srvc_line_rate,
'NA' drug_desc,
'NA' product_service_id,
'NA' uom_code,
'NA' rqst_prcdr_units
FROM
pa_transaction_request ptr,
input_acknwldgmnt ia,
input_batch_file ibf,
pa_request pr,
pa_request_service prs,
pa_request_procedure prp,
    SELECT
      prpre.pa_rqst_prcdr_sid,
      MAX(DECODE(pa_error_nmbr,'5013',prpre.erroneous_data_value,NULL)) c5013,
      MAX(DECODE(pa_error_nmbr,'5014',prpre.erroneous_data_value,NULL)) c5014,
      MAX(DECODE(pa_error_nmbr,'5015',prpre.erroneous_data_value,NULL)) c5015,
      MAX(DECODE(pa_error_nmbr,'5026',prpre.erroneous_data_value,NULL)) c5026,
      MAX(DECODE(pa_error_nmbr,'5027',prpre.erroneous_data_value,NULL)) c5027,
      MAX(DECODE(pa_error_nmbr,'5028',prpre.erroneous_data_value,NULL)) c5028,
      MAX(DECODE(pa_error_nmbr,'5029',prpre.erroneous_data_value,NULL)) c5029,
      MAX(DECODE(pa_error_nmbr,'5030',prpre.erroneous_data_value,NULL)) c5030,
      MAX(DECODE(pa_error_nmbr,'5031',prpre.erroneous_data_value,NULL)) c5031
    FROM
      pa_error pe,
      pa_error_detail ped,
      pa_request_procedure_run_error prpre
    WHERE
      pe.pa_error_sid     = ped.pa_error_sid
    AND ped.pa_error_sid = prpre.pa_error_sid
    AND ped.oprtnl_flag   = 'A'
    AND prpre.oprtnl_flag = 'A'
    AND pe.pa_error_nmbr IN ('5013','5014','5015','5026','5027','5028','5029',
      '5030','5031')
    AND ped.aaa_segment_loop_nmbr = '2000F'
    GROUP BY
      prpre.pa_rqst_prcdr_sid
pvt
WHERE
pvt.pa_rqst_prcdr_sid       = prp.pa_rqst_prcdr_sid
AND ptr.input_acknwldgmnt_sid = ia.input_acknwldgmnt_sid
AND ia.input_batch_file_sid   = ibf.input_batch_file_sid
AND ptr.pa_trnsctn_rqst_sid   = pr.pa_trnsctn_rqst_sid
AND pr.pa_rqst_sid            = prs.pa_rqst_sid
AND prs.pa_rqst_srvc_sid      = prp.pa_rqst_srvc_sid
AND pr.oprtnl_flag            = 'A'
AND prs.oprtnl_flag           = 'A'
AND ptr.oprtnl_flag           = 'A'
AND prp.oprtnl_flag           = 'A'
AND prs.rqst_ctgry_lkpcd      = 'AR'
AND ibf.original_file_name    = 'HIPAA.165760000.20110613I001.278_IRej.dat';Edited by: Nicosa on Jul 12, 2011 2:20 PM
Corrected columns aliases in outer query :
- c5031 instead of 5031
- c5013 instead of 5013

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                                                    AND      sub_sub.PS_NODE_NAME = 'tubing')) tubing_material
FROM    aso_quote_lines_all asoqla,
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WHERE   asoqla.quote_header_id = 55774
AND     asoqla.item_type_code = 'MDL'
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AND     asoqla.quote_line_id = asoqld.quote_line_id
AND     asoqld.config_header_id = czci.config_hdr_id
AND     asoqld.config_revision_num = czci.config_rev_nbr
AND     czci.ps_node_name = 'CONTROL MASTER ASLY'
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.04       0.03          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        3      0.09       0.08          0       5100          0          19
total        5      0.13       0.12          0       5100          0          19
Misses in library cache during parse: 1
Optimizer goal: ALL_ROWS
Parsing user id: 173 (APPS)
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     40   NESTED LOOPS (cr=2158 pr=0 pw=0 time=32276 us)
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   5490       INDEX RANGE SCAN CZ_CONFIG_ITEMS_PK (cr=96 pr=0 pw=0 time=1230 us)(object id 3049621)
      3      TABLE ACCESS BY INDEX ROWID CZ_CONFIG_ITEMS (cr=260 pr=0 pw=0 time=2795 us)
   1094       INDEX RANGE SCAN CZ_CONFIG_ITEMS_PK (cr=19 pr=0 pw=0 time=264 us)(object id 3049621)
      3     TABLE ACCESS BY INDEX ROWID CZ_PS_NODES (cr=1222 pr=0 pw=0 time=15920 us)
      3      INDEX RANGE SCAN CZ_PS_NODES_N12 (cr=1219 pr=0 pw=0 time=15863 us)(object id 750095)
      1       SORT AGGREGATE (cr=1211 pr=0 pw=0 time=15753 us)
    209        TABLE ACCESS FULL CZ_DEVL_PROJECTS (cr=1211 pr=0 pw=0 time=15452 us)
     18    INDEX RANGE SCAN CZ_LOCALIZED_TEXTS_N1 (cr=11 pr=0 pw=0 time=79 us)(object id 31504)
     19 TABLE ACCESS BY INDEX ROWID CZ_CONFIG_ITEMS (cr=778 pr=0 pw=0 time=20571 us)
   5816   NESTED LOOPS (cr=202 pr=0 pw=0 time=8497 us)
     21    NESTED LOOPS (cr=96 pr=0 pw=0 time=2037 us)
     23     TABLE ACCESS BY INDEX ROWID ASO_QUOTE_LINES_ALL (cr=47 pr=0 pw=0 time=1427 us)
   1058      INDEX RANGE SCAN ASO_QUOTE_LINES_ALL_N1 (cr=9 pr=0 pw=0 time=51 us)(object id 81688)
     21     TABLE ACCESS BY INDEX ROWID ASO_QUOTE_LINE_DETAILS (cr=49 pr=0 pw=0 time=596 us)
     21      INDEX RANGE SCAN ASO_QUOTE_LINE_DETAILS_N1 (cr=28 pr=0 pw=0 time=323 us)(object id 81706)
   5794    INDEX RANGE SCAN CZ_CONFIG_ITEMS_PK (cr=106 pr=0 pw=0 time=1424 us)(object id 3049621)

Hi
After affed the exist operator i got below output. But it is more than that the previous one.
SELECT czci.config_hdr_id, czci.config_rev_nbr, asoqla.quantity,
       (SELECT node_desc.localized_str
          FROM cz_localized_texts node_desc,
               cz_ps_nodes ps_nodes,
               cz_config_items czci1
         WHERE czci1.config_hdr_id = asoqld.config_header_id
           AND czci1.config_rev_nbr = asoqld.config_revision_num
           AND node_desc.intl_text_id = ps_nodes.intl_text_id
           AND NVL (node_desc.LANGUAGE, USERENV ('LANG')) = USERENV ('LANG')
           AND czci1.ps_node_id = ps_nodes.persistent_node_id
           AND ps_nodes.devl_project_id = (SELECT MAX (devl_project_id)
                                             FROM cz_devl_projects
                                            WHERE NAME = 'Control Model')
           AND EXISTS (
                  SELECT NULL
                    FROM cz_config_items sub_sub
                   WHERE sub_sub.config_hdr_id = asoqld.config_header_id
                     AND sub_sub.config_rev_nbr = asoqld.config_revision_num
                     AND sub_sub.ps_node_name = 'fittings'
                     AND czci1.parent_config_item_id = sub_sub.config_item_id))
                                                             fitting_material,
       (SELECT node_desc.localized_str
          FROM cz_localized_texts node_desc,
               cz_ps_nodes ps_nodes,
               cz_config_items czci1
         WHERE czci1.config_hdr_id = asoqld.config_header_id
           AND czci1.config_rev_nbr = asoqld.config_revision_num
           AND node_desc.intl_text_id = ps_nodes.intl_text_id
           AND node_desc.LANGUAGE = USERENV ('LANG')
           AND czci1.ps_node_id = ps_nodes.persistent_node_id
           AND ps_nodes.devl_project_id = (SELECT MAX (devl_project_id)
                                             FROM cz_devl_projects
                                            WHERE NAME = 'Control Model')
           AND EXISTS (
                  SELECT NULL
                    FROM cz_config_items sub_sub
                   WHERE sub_sub.config_hdr_id = czci.config_hdr_id
                     AND sub_sub.config_rev_nbr = czci.config_rev_nbr
                     AND sub_sub.ps_node_name = 'tubing'
                     AND czci1.parent_config_item_id = sub_sub.config_item_id))
                                                              tubing_material
FROM aso_quote_lines_all asoqla,
       aso_quote_line_details asoqld,
       cz_config_items czci
WHERE asoqla.quote_header_id = 55774
   AND asoqla.item_type_code = 'MDL'
--AND     asoqla.org_id = 2763
   AND asoqla.quote_line_id = asoqld.quote_line_id
   AND asoqld.config_header_id = czci.config_hdr_id
   AND asoqld.config_revision_num = czci.config_rev_nbr
   AND czci.ps_node_name = 'CONTROL MASTER ASLY'
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.02       0.03          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        3      0.16       0.14          0      16526          0          19
total        5      0.18       0.17          0      16526          0          19
Misses in library cache during parse: 1
Optimizer goal: ALL_ROWS
Parsing user id: 173 (APPS)
Rows     Row Source Operation
      3 TABLE ACCESS BY INDEX ROWID CZ_LOCALIZED_TEXTS (cr=7874 pr=0 pw=0 time=51192 us)
     40   NESTED LOOPS (cr=7871 pr=0 pw=0 time=50953 us)
      3    NESTED LOOPS (cr=7860 pr=0 pw=0 time=50729 us)
      3     TABLE ACCESS BY INDEX ROWID CZ_CONFIG_ITEMS (cr=6638 pr=0 pw=0 time=33183 us)
      3      INDEX RANGE SCAN CZ_CONFIG_ITEMS_N1 (cr=6635 pr=0 pw=0 time=33060 us)(object id 31734)
      3       TABLE ACCESS BY INDEX ROWID CZ_CONFIG_ITEMS (cr=6536 pr=0 pw=0 time=22873 us)
   1292        INDEX UNIQUE SCAN CZ_CONFIG_ITEMS_PK (cr=5244 pr=0 pw=0 time=15326 us)(object id 3049621)
      3     TABLE ACCESS BY INDEX ROWID CZ_PS_NODES (cr=1222 pr=0 pw=0 time=17483 us)
      3      INDEX RANGE SCAN CZ_PS_NODES_N12 (cr=1219 pr=0 pw=0 time=17411 us)(object id 750095)
      1       SORT AGGREGATE (cr=1211 pr=0 pw=0 time=17266 us)
    209        TABLE ACCESS FULL CZ_DEVL_PROJECTS (cr=1211 pr=0 pw=0 time=16844 us)
     18    INDEX RANGE SCAN CZ_LOCALIZED_TEXTS_N1 (cr=11 pr=0 pw=0 time=122 us)(object id 31504)
      3 NESTED LOOPS (cr=7874 pr=0 pw=0 time=48203 us)
      3   NESTED LOOPS (cr=7860 pr=0 pw=0 time=47973 us)
      3    TABLE ACCESS BY INDEX ROWID CZ_CONFIG_ITEMS (cr=6638 pr=0 pw=0 time=30352 us)
      3     INDEX RANGE SCAN CZ_CONFIG_ITEMS_N1 (cr=6635 pr=0 pw=0 time=30218 us)(object id 31734)
      3      TABLE ACCESS BY INDEX ROWID CZ_CONFIG_ITEMS (cr=6536 pr=0 pw=0 time=20960 us)
   1292       INDEX UNIQUE SCAN CZ_CONFIG_ITEMS_PK (cr=5244 pr=0 pw=0 time=14224 us)(object id 3049621)
      3    TABLE ACCESS BY INDEX ROWID CZ_PS_NODES (cr=1222 pr=0 pw=0 time=17570 us)
      3     INDEX RANGE SCAN CZ_PS_NODES_N12 (cr=1219 pr=0 pw=0 time=17510 us)(object id 750095)
      1      SORT AGGREGATE (cr=1211 pr=0 pw=0 time=17395 us)
    209       TABLE ACCESS FULL CZ_DEVL_PROJECTS (cr=1211 pr=0 pw=0 time=16937 us)
      3   TABLE ACCESS BY INDEX ROWID CZ_LOCALIZED_TEXTS (cr=14 pr=0 pw=0 time=165 us)
      3    INDEX UNIQUE SCAN CZ_LOCALIZED_TEXTS_PK (cr=11 pr=0 pw=0 time=132 us)(object id 3050530)
     19 TABLE ACCESS BY INDEX ROWID CZ_CONFIG_ITEMS (cr=778 pr=0 pw=0 time=41677 us)
   5816   NESTED LOOPS (cr=202 pr=0 pw=0 time=16173 us)
     21    NESTED LOOPS (cr=96 pr=0 pw=0 time=3617 us)
     23     TABLE ACCESS BY INDEX ROWID ASO_QUOTE_LINES_ALL (cr=47 pr=0 pw=0 time=2528 us)
   1058      INDEX RANGE SCAN ASO_QUOTE_LINES_ALL_N1 (cr=9 pr=0 pw=0 time=83 us)(object id 81688)
     21     TABLE ACCESS BY INDEX ROWID ASO_QUOTE_LINE_DETAILS (cr=49 pr=0 pw=0 time=1053 us)
     21      INDEX RANGE SCAN ASO_QUOTE_LINE_DETAILS_N1 (cr=28 pr=0 pw=0 time=598 us)(object id 81706)
   5794    INDEX RANGE SCAN CZ_CONFIG_ITEMS_PK (cr=106 pr=0 pw=0 time=8245 us)(object id 3049621)

How to reduce the column definition w/o losing the data in the columns?

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