Finding all rows based on previous rows column value diffrence

I have an interesting requirement. There is a DATE column and a user in a table and I have to find all rows for all the user for which the previous row and current row has time difference of lets say more than 30 minutes. Rows are already sorted by time.
For example in the following table, we need ID 4 and 6 for user 1.
ID User date
1 1 today 1 hour 0 min 0 s
2 1 today 1 hour 1 min 0 s
3 1 today 1 hour 29 min 0 s
*4 1 today 1 hour 59 min 3 s*
5 1 today 2 hour 10 min 2 s
*6 1 today 2 hour 50 min 7 s*
Edited by: user733179 on Mar 5, 2009 12:00 PM

Hi,
To get all the users in the result set, outer-join to a table (or subquery, as shown bleow) that has one row per user:
WITH     got_dif     AS
     SELECT     id,     dt,     usr
     ,     (dt - LAG (dt)
                OVER ( PARTITION BY  usr
                          ORDER BY          dt
          )             -- difference in days
              * 24 * 60  AS minutes_dif
     FROM     table_x
--     WHERE     ...     -- if needed
,     all_users     AS
     SELECT DISTINCT  usr
     FROM              table_x
SELECT     gd.id,     gd.dt,     au.usr
,     NVL2 ( gd.usr
          , 'Okay'
          , 'Dif is never > 30'
          )    AS flag
FROM          all_users
LEFT OUTER JOIN     got_dif          ON  gd.usr         = au.usr
                            AND gd.minutes_dif > 30
;Notice that the test for a 30-minute difference is part of the join condition.
You don't need the flag column, and you may not want it.
If you would prefer a separate query of just the users that are not in the original result set, then you can use the original query (modified only slightly) as an EXISTS ior NOT IN sub-query. For example:
SELECT DISTINCT     usr
FROM    table_x
WHERE   usr  NOT IN
     WITH     got_dif     AS
          SELECT     id,     dt,     usr
          ,     (dt - LAG (dt)
                         OVER ( PARTITION BY  usr
                                  ORDER BY          dt
                )             -- difference in days
                    * 24 * 60  AS minutes_dif
           FROM     table_x
--          WHERE     ...     -- if needed
     SELECT  usr   -- Only 1 column in SELECT clause
     FROM     got_dif
     WHERE     minutes_dif     > 30
;

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    vgrant_respdate := to_date(HTMLDB_APPLICATION.G_F03(i),'MM/DD/YYYY');
    UPDATE HEALTH_ISSUE_TYPES
    SET grant_granted = vgrant_grnted,
    grant_response_date = vgrant_respdate
    WHERE animal_issue_type_id = AI_ID;
    COMMIT;
    END LOOP;
    end if;
    END;

    It's actually three reports that get run during different stages of the screen.
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    SELECT hit.animal_issue_type_id, at.animal_type_desc, it.issue_type_desc, hit.grant_requested
    FROM health_issue_types hit, animal_types at,issue_types it
    WHERE hit.animal_type_id = at.animal_type_id
    AND hit.issue_type_id = it.issue_type_id
    AND hit.file_no = :P6_FILE_NO;
    The user will make a selection from the LOV select list (Yes, No) for the grant_requested field and then click on the Submit button.
    {color:#ff0000}*If the user selects 'NO' for this field then I want to disable the grant_granted and grant_response_date fields when the screen is populated from the ISSUES REPORT sql. If this cannot be easily done then I would like to hide the entire row when 'NO' has been selected for the grant_requested field.*{color}
    When the screen returns the data is populated from the ISSUES REPORT sql:
    ISSUES REPORT
    SELECT hit.animal_issue_type_id, at.animal_type_desc, it.issue_type_desc, hit.grant_requested,
    hit.grant_granted, hit.grant_response_date
    FROM health_issue_types hit, animal_types at,issue_types it
    WHERE hit.animal_type_id = at.animal_type_id
    AND hit.issue_type_id = it.issue_type_id
    AND hit.file_no = :P6_FILE_NO;
    At this point the grant_requested field will no longer be available for user modification. The user will make a selection from the LOV select list (Yes, No) for the grant_granted, and the grant_response_date fields and then click on the Submit button again.
    When the screen returns the data is populated from the ANIMAL DISPLAY ONLY REPORT sql:
    ANIMAL DISPLAY ONLY REPORT
    SELECT hit.animal_issue_type_id, at.animal_type_desc, it.issue_type_desc, hit.grant_requested,
    hit.grant_granted, hit.grant_response_date
    FROM health_issue_types hit, animal_types at, issue_types it
    WHERE hit.animal_type_id = at.animal_type_id
    AND hit.issue_type_id = it.issue_type_id
    AND hit.file_no = :P6_FILE_NO;
    At this point the grant_requested, grant_granted, and grant_response_date fields will no longer be available for user modification.
    {color:#0000ff}Thank you for taking the time to look at my problem.{color}

  • Query! calculation based on previous row value

    Hi,
    ID     Code     Direction     From Amount  To Perct      To Amount
    98     POI     F          5457.00          0     
    77     LKJ     T          0          50      (5457*(50/100))
    56     MNB     T          0          25      (5457*(25/100))How to calculate 'To Amount' with in the select query? To Amount will be calculated on the basis of
    From Amount of the First row multiplied by 'To Perct'
    When I wrote a select statement it's taking 0 as 'From Amount'( Because it's in current row) and giving me 0 as 'To Amount'
    Thanks

    One possibility:
    with t as (
    select 98 id,     'POI' Code,     'F' Direction, 5457.00 FromAmount,          0 ToPerct from dual     union all
    select 77,     'LKJ',     'T',          0,          50 from dual     union all
    select 56,     'MNB',     'T',          0,          25 from dual)
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    from t,
         (select max(FromAmount) MaxAmount from t) tmax ;Results:
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            98 POI F       5457          0          0
            77 LKJ T          0         50     2728,5
            56 MNB T          0         25    1364,25Regards,
    Miguel

  • Grouping Header Rows based on common rows in Details

    Hi,
    I have two tables TAB_MST and TAB_DTL with information like below:
    {code}
    CREATE TABLE TAB_MST
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    INSERT INTO TAB_MST (MSTCOL) VALUES (2);
    INSERT INTO TAB_MST (MSTCOL) VALUES (3);
    INSERT INTO TAB_MST (MSTCOL) VALUES (4);
    CREATE TABLE TAB_DTL
      MSTCOL  NUMBER,
      DTLCOL  NUMBER
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    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (1, 1);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (1, 2);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (1, 3);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (1, 4);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (1, 5);
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    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (2, 7);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (2, 8);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (2, 9);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (3, 8);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (3, 9);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (3, 10);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (3, 11);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (4, 12);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (4, 13);
    INSERT INTO TAB_DTL (MSTCOL, DTLCOL) VALUES  (4, 14);
    COMMIT;
    {code}
    I want to group rows in Master table (TAB_MST) to different groups based on the data in detail table (TAB_DTL) with output as below
    MSTCOL      GROUPID
         1               1
         2               1
         3               1
         4               2
    Rule for Grouping are as follows:
    1) If there is any common value of DTLCOL for two different values of MSTCOL, then both MSTCOL values should be grouped under same group, e.g. for above sample case
    DTLCOL (Value = 4) is common for MSTCOL = 1 and MSTCOL = 2, hence MSTCOL 1 and MSTCOL 2 belong to same group (GROUPID = 1).
    DTLCOL (Value = 8, 9) is common for MSTCOL = 2 and MSTCOL = 3, hence MSTCOL 3 should belong to same group as MSTCOL 2 (GROUPID = 1)
    There is no common value of DTLCOL for MSTCOL = 4, hence it is in a separate group.
    Below is the sample PL/SQL block to highlight this grouping behavior. Two temporary tables are created to achieve this:
    {code}
    CREATE TABLE TAB_MST_GROUP
      MSTCOL   NUMBER,
      GROUPID  NUMBER
    CREATE TABLE TAB_TMP_GROUP
      GROUPID  NUMBER
    DECLARE
       CURSOR c1
       IS
          SELECT * FROM tab_mst;
       prevmstcol    NUMBER;
       prevgroupid   NUMBER := 1;
       vtmpgroupid   NUMBER;
    BEGIN
       DELETE tab_mst_group;
       FOR r1 IN c1
       LOOP
          IF prevmstcol IS NULL
          THEN
             INSERT INTO tab_mst_group
                  VALUES (r1.mstcol, prevgroupid);
             prevmstcol := r1.mstcol;
          ELSE
             INSERT INTO tab_tmp_group
                SELECT DISTINCT groupid
                  FROM tab_mst_group a, tab_dtl b, tab_dtl c
                 WHERE     a.mstcol = b.mstcol
                       AND c.dtlcol = b.dtlcol
                       AND c.mstcol = r1.mstcol;
             IF SQL%ROWCOUNT = 0
             THEN
                prevgroupid := prevgroupid + 1;
                INSERT INTO tab_mst_group
                     VALUES (r1.mstcol, prevgroupid);
             ELSE
                SELECT MIN (groupid) INTO vtmpgroupid FROM tab_tmp_group;
                UPDATE tab_mst_group
                   SET groupid = vtmpgroupid
                 WHERE groupid IN (SELECT groupid FROM tab_tmp_group);
                INSERT INTO tab_mst_group
                     VALUES (r1.mstcol, vtmpgroupid);
                SELECT MAX (groupid) INTO prevgroupid FROM tab_mst_group;
                DELETE tab_tmp_group;
             END IF;
          END IF;
       END LOOP;
    END;
    {code}
    Question:
    a. Can we achieve this in SQL instead of PL/SQL?
    b. Overhead of read from TAB_DTL grows exponentially if the No of records in TAB_MST grows. How can we reduce the no of read from TAB_DTL as the actual no of rows in TAB_DTL are very high.
    Thanks,
    sukhijank

    Hi, Sukhijank,
    Thanks for the additional information.  You didn't just learn those details since posting your first message, did you?  If you post information like that in your first message, then people can use it to give you a better answer in the first reply.
    The idea I had for a recursive WITH clause solution won't work after all.
    I think the best solution will be in PL/SQL, using a table like tab_mst_group which you posted, but with an additional column:
    CREATE TABLE TAB_MST_GROUP
      mstcol NUMBER PRIMARY KEY,
      groupid   NUMBER,
      levelnum NUMBER
    CREATE INDEX tab_mst_group_groupid_levelnum
    ON     tab_mst_group (levelnum, groupid);
    If llevelnum = 0, that means the assignment of the groupid is not certain; if levelnum > 0, then groupid is correct.
    Here's a procedure you can use to populate the table:
    CREATE OR REPLACE PROCEDURE tab_mst_group_populate
    AS
        new_groupid  tab_mst_group.groupid%TYPE
         := 0;
        new_levelnum tab_mst_group.levelnum%TYPE;
        num_added  PLS_INTEGER;
        truncate_stmt VARCHAR2 (50) := 'TRUNCATE TABLE tab_mst_group';
    BEGIN
        --  *****  Remove old entries from the table  *****
        -- dbms_output.put_line (truncate_stmt || ' = truncate_stmt in tab_mst_group_populate'); -- Debugging
        EXECUTE IMMEDIATE  truncate_stmt;
        --  *****  Populate table with all mstcols, and 1-member groups  *****
        INSERT INTO  tab_mst_group (mstcol, groupid, levelnum)
        SELECT    m.mstcol
        ,       m.mstcol  AS groupid
        ,       MIN ( CASE
                         WHEN  o.mstcol IS NULL
         THEN  1
         ELSE  0
                     END
        )  AS lvlnum
        FROM     tab_mst    m
        LEFT JOIN tab_dtl    d ON  d.mstcol = m.mstcol
        LEFT JOIN tab_dtl    o ON  o.dtlcol = d.dtlcol
                AND o.mstcol   != d.mstcol
        GROUP BY    m.mstcol;
        --  ***** Get groupid for lowest mstcol that still needs one  *****
        WHILE  new_groupid IS NOT NULL
        LOOP
            SELECT  MIN (groupid)
    INTO new_groupid
    FROM tab_mst_group
    WHERE levelnum = 0;
    IF  new_groupid   IS NOT NULL
    THEN
         --  ***  Confirm groupid for this one mstcol  ***
         UPDATE  tab_mst_group
         SET     levelnum = 1
         WHERE   levelnum = 0
         AND     groupid = new_groupid;
         new_levelnum := 2;
         num_added := 1;
         --  ***  Add neighboring mstcols to this group  ***
         WHILE  num_added > 0
         LOOP
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      SET groupid   = new_groupid
      , levelnum  = new_levelnum
      WHERE levelnum  = 0
      AND groupid   IN (
                       SELECT  d2.mstcol
                FROM  tab_mst_group g1
          JOIN  tab_dtl       d1  ON  d1.mstcol  = g1.mstcol
          JOIN  tab_dtl       d2  ON  d2.dtlcol  = d1.dtlcol
                        AND d2.mstcol != d1.mstcol
          JOIN  tab_mst_group g2  ON  g2.mstcol  = d2.mstcol
          WHERE  g1.levelnum  = new_levelnum - 1
          AND  g1.groupid   = new_groupid
          AND  g2.levelnum  = 0
      num_added := SQL%ROWCOUNT;
      dbms_output.put_line (num_added || ' = num_added');
             new_levelnum := new_levelnum + 1;
         END LOOP;
    END IF;
        END LOOP;
    END tab_mst_group_populate;
    SHOW ERRORS
    The basic strategy is that we start off assuming that every mstcol will be its own groupid.  The CASE expression in the INSERT statement sets levelnum = 1 for mstcols that do not exist in the tab_dtl table, or are not related to other mstcols in tab_dtl.  The loop after that looks for rows in tab_mst_group that are still 0, meaning that the assignment of grpupid still has to be confirmed or changed.  It starts by finding the lowest mstcol that still has levelnum = 0, and makes that a new group.  The inner loop looks for related mstcols and marks them as being in the same group.
    You might combine tab_mst and tab_mst_group; I don't see any need to have a separate table (but maybe you do).  If you do combine them, then you wouldn't truncate the table in the procedure.

  • Trying to find ALL objects that point to one column...

    Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
    PL/SQL Release 11.2.0.3.0 - Production
    CORE     11.2.0.3.0     Production
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    I have multiple schemas, all which have tons of objects that point to one column of one table.
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    Use view - DBA_DEPENDENCIES
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    HTH
    Ranit B.
    Edited by: ranit B on Oct 15, 2012 11:09 PM
    -- added                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

  • Display rows which has only unique column values

    One of my table has the following data in it.
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    1005    
    1007              DNA
    1008              DNA
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    You have 1000 as duplicate values in the column. But both have different indcode.
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  • Query to Find all the Tables and their corresponding columns,dataType in DB

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  • How to select record in mulitple rows based on another field's values?

    Hi,
    sorry about the bad title, really not sure how to explain this
    Have the following data:
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    1005009401     CLBR1
    1005009401     TLBR0
    1005009401     TLBR1
    1005009401     VEH00
    1005009402     CLBR3
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    1005009402     TLBR6
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    Any thoughts?
    Thanks.
    Edited by: dgouin on Aug 29, 2012 11:42 AM - added more sample data.
    Edited by: dgouin on Aug 29, 2012 11:45 AM
    Edited by: dgouin on Aug 29, 2012 11:49 AM

    Sorta kludgey, but functional:
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      UNION ALL
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      UNION ALL
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      UNION ALL
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      UNION ALL
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      UNION ALL
      SELECT '1005009901' AS CC, 'TLBR1' AS activity_type FROM dual
      UNION ALL
      SELECT '1005009901' AS CC, 'VEH01' AS activity_type FROM dual
    SELECT cc, activity_type
    FROM   ccs c1
    WHERE  5 != (SELECT COUNT(DISTINCT activity_type)
                 FROM   ccs c2
                 WHERE  activity_type IN ('CLBR0','CLBR1','TLBR0','TLBR1','VEH01')
                 AND    c1.cc = c2.cc
    CC         ACTIVITY_TYPE
    1005009401 CLBR0        
    1005009401 CLBR1        
    1005009401 TLBR0        
    1005009401 TLBR1        
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