Updated SQL help

Hi all

I need correct column value serNo to the right as a result. It suppose to be the sequence number for each storeID. Any suggestion on the SQL?

create table test1 (storeID number (5), number serNo (5));

insert into table test1 values (100, 1);

insert into table test1 values (200, 1);

insert into table test1 values (100, 1);

insert into table test1 values (200, 1);

insert into table test1 values (100, 1);

insert into table test1 values (100, 1);

I want to have the following results in test1 after conversion:

1 100

2 100

3 100

4 100

1 200

2 200

Thank you

Hello

942572 wrote:

Hi all

I need correct column value serNo to the right as a result. It suppose to be the sequence number for each storeID. Any suggestion on the SQL?

create table test1 (storeID number (5), number serNo (5));

insert into table test1 values (100, 1);

insert into table test1 values (200, 1);

insert into table test1 values (100, 1);

insert into table test1 values (200, 1);

insert into table test1 values (100, 1);

insert into table test1 values (100, 1);

I want to have the following results in test1 after conversion:

1 100

2 100

3 100

4 100

1 200

2 200

Thank you

Use the ROW_NUMBER analytic function to generate the new sernos, like this:

MERGE INTO dst test1

WITH THE HELP OF)

SELECT ROWID AS r_id

ROW_NUMBER () OVER (PARTITION BY storeid

ORDER BY NULL

) AS serno

OF test1

)               src

ON (summer time. ROWID = src.r_id)

WHEN MATCHED THEN UPDATE

SET dst.serno = src.serno

;

Really, your table must have a primary key.  Because it's not working, I had to ROWID allows you to uniquely identify the lines.

Tags: Database

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    7900,30,4

    7698,30,5

    7654,30,6

    >

    According to the number of rows in the table, you might be better to create a new table using DEC or a query like this.

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