SQL to find the grouped rows that have changed their values?

Hello
I wonder if it is a pure SQL way do this...?

I have a table that has a number of columns:
InsertionDate
IDENTITY
Col - has to pass - z - some data.

the pair (InsertionDate, identity) is unique.

The lines represent the same values as they change over time, for example:

Select * from < mytable > by its identity, InsertionDate;
Balance InsertionDate identity
10 February 01-1001 - 100
11 February 01-1001-1
1001 12 February 01 50
10 February 01-1002-10
11 February 01-1002-10
1002 12 February 01 76


I want to do the following:

Select < myTable > from where InsertionDate and the next InsertionDate have a different value for the balance "grouped by" identity and InsertionDate = "10 February 01»;»»
[I use "grouped by" with great caution - I can't explain in 'Nick sql' without using the misleading grouped by term]

To produce the output:

Balance InsertionDate identity
10 February 01-1001 - 100
11 February 01-1001-1

Select < myTable > from where InsertionDate and the next InsertionDate have a different value for the balance "grouped by" identity and InsertionDate = ' 11 February 01»;»»
Balance InsertionDate identity
11 February 01-1001-1
1001 12 February 01 50
11 February 01-1002-10
1002 12 February 01 76

There may be several columns in addition to the balance that should also be checked for changes.

See you soon,.
Karl.

A little misread your reqs:

with t as (
           select to_date('10-Feb-01','dd-mon-yy') InsertionDate,1001 Identity,-100 Balance from dual union all
           select to_date('11-Feb-01','dd-mon-yy'),1001,1 from dual union all
           select to_date('12-Feb-01','dd-mon-yy'),1001,50 from dual union all
           select to_date('10-Feb-01','dd-mon-yy'),1002,10 from dual union all
           select to_date('11-Feb-01','dd-mon-yy'),1002,10 from dual union all
           select to_date('12-Feb-01','dd-mon-yy'),1002,76 from dual
          )
select  InsertionDate,
        Identity,
        Balance
  from  (
         select  InsertionDate,
                 Identity,
                 Balance,
                 row_number() over(partition by Identity order by InsertionDate) rn,
                 lead(Balance,1,Balance - 1) over(partition by Identity order by InsertionDate) next_balance
           from  t
        )
  where balance != next_balance
    and rn != 1
  order by Identity,
           InsertionDate
/

INSERTION   IDENTITY    BALANCE
--------- ---------- ----------
11-FEB-01       1001          1
12-FEB-01       1001         50
11-FEB-01       1002         10
12-FEB-01       1002         76

SQL>

SY.

Tags: Database

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