sqlsql-serverstored-procedures

How to renumber the field value in SQL using SQL script


I have a table, with one datatype [int] column LNITMSEQ. The numbers are all unique.

For example,

Before delete a record:

Original

After deleting a record:

Renumber

May I now how to renumber it using SQL Script? I wish to use a stored procedure to call it


Solution

  • Use ROW_NUMBER to re-number your rows as follows:

    DECLARE @SOP10200 table (LNITMSEQ int);
    
    INSERT INTO @SOP10200 (LNITMSEQ)
        VALUES
        (16384),
        (32768),
        (49152),
        (65536);
    
    DELETE FROM @SOP10200 WHERE LNITMSEQ = 16384;
    
    WITH cte AS (
        SELECT LNITMSEQ
            , 16348 * ROW_NUMBER() OVER (ORDER BY LNITMSEQ ASC) AS NEW_LNITMSEQ
        FROM @SOP10200
    )
    UPDATE cte SET LNITMSEQ = NEW_LNITMSEQ;
    
    SELECT *
    FROM @SOP10200
    ORDER BY LNITMSEQ;
    

    Returns (ignoring the other columns which aren't relevant):

    LNITMSEQ
    16348
    32696
    49044