Convertir les colonnes en lignes dans SQL Server
# 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;
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