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Convert columns to rows in SQL Server

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Mappy Show answered on April 13, 2021 Popularity 9/10 Helpfulness 3/10

answer Convert columns to rows in SQL Server

related convert rows to columns in sql server

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Convert columns to rows in SQL Server

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# You can use the UNPIVOT function to convert the columns into rows:

select id, entityId,
  indicatorname,
  indicatorvalue
from yourtable
unpivot
(
  indicatorvalue
  for indicatorname in (Indicator1, Indicator2, Indicator3)
) unpiv;

# Note, the datatypes of the columns you are unpivoting must be the same so you might 
# have to convert the datatypes prior to applying the unpivot.

# You could also use CROSS APPLY with UNION ALL to convert the columns:

select id, entityid,
  indicatorname,
  indicatorvalue
from yourtable
cross apply
(
  select 'Indicator1', Indicator1 union all
  select 'Indicator2', Indicator2 union all
  select 'Indicator3', Indicator3 union all
  select 'Indicator4', Indicator4 
) c (indicatorname, indicatorvalue);

# Depending on your version of SQL Server you could even use CROSS APPLY with 
# the VALUES clause:

select id, entityid,
  indicatorname,
  indicatorvalue
from yourtable
cross apply
(
  values
  ('Indicator1', Indicator1),
  ('Indicator2', Indicator2),
  ('Indicator3', Indicator3),
  ('Indicator4', Indicator4)
) c (indicatorname, indicatorvalue);

# Finally, if you have 150 columns to unpivot and 
# you don't want to hard-code the entire query, then you could generate the 
# sql statement using dynamic SQL:

DECLARE @colsUnpivot AS NVARCHAR(MAX),
   @query  AS NVARCHAR(MAX)

select @colsUnpivot 
  = stuff((select ','+quotename(C.column_name)
           from information_schema.columns as C
           where C.table_name = 'yourtable' and
                 C.column_name like 'Indicator%'
           for xml path('')), 1, 1, '')

set @query 
  = 'select id, entityId,
        indicatorname,
        indicatorvalue
     from yourtable
     unpivot
     (
        indicatorvalue
        for indicatorname in ('+ @colsunpivot +')
     ) u'

exec sp_executesql @query;

Popularity 9/10 Helpfulness 3/10 Language sql

Source: stackoverflow.com

Tags: sql sql-server

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Contributed on May 06 2022

Mappy Show

0 Answers Avg Quality 2/10

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convert rows to columns in sql server

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-- convert rows to columns in sql server (PIVOT)
SELECT Firstname, Amount, PostalCode
FROM (
         SELECT value, columnname
         FROM yourtable
     ) d
PIVOT (
    max(value)
    FOR columnname IN (Firstname, Amount, PostalCode)
) piv;

Popularity 10/10 Helpfulness 6/10 Language sql

Source: Grepper

Tags: rows

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Contributed on Apr 13 2021

VasteMonde

0 Answers Avg Quality 2/10

sql rows to columns

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SELECT *
FROM
(
  SELECT column1, column2 -- Specify the columns you want to pivot
  FROM your_table
) AS SourceTable
PIVOT
(
  MAX(column2) -- Apply an aggregation function (e.g., MAX, MIN, SUM) to the column you want to pivot
  FOR column1 IN ([Value1], [Value2], [Value3]) -- Provide the distinct values in column1 to become columns
) AS PivotTable;

Popularity 8/10 Helpfulness 3/10 Language sql

Source: Grepper

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Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

Convert columns to rows in SQL Server

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