在一个临时表T-SQL中更新2个值

Question

I would like your help for a query. I have a temporary table with value(float), attribute(nvarchar) and system(int). I need to update the values depending the attribute, but using the system. So...

UPDATE #inventory (value, attribute)
SET (value, attribute) = (SELECT SUM(value), 'Actual'
                        FROM ReportValue v, ReportValueType t, ReportProducts ti
                        WHERE v.type_id = t.id
                        AND v.voyage_id = ti.id
                        AND t.value_code = 'total'
                        AND t.category_code = 'cold'
                        AND ti.end_time BETWEEN @start AND @end)
UPDATE #inventory (value, attribute)
SET (value, attribute) = (SELECT SUM(value), 'Actual'
                        FROM ReportValue v, ReportType t, Reportprod ti
                        WHERE v.type_id = t.id
                        AND v.voyage_id = ti.id
                        AND t.field_name = 'Total'
                        AND t.slot_type = 'COLD'
                        AND t.xml_id = -2000
                        AND ti.end_time BETWEEN @start AND @end)
else (value, attribute)
end

This is the wrong form. How can I get it working? Thank you in advance for your answers!

Answer 1

OK so it semms you are trying too get your head around update syntax... (that is compliant):

UPDATE tblNameCanBeTempTable
SET Column1 = S.Value1, Column2 = S.Value2, etc
FROM (anyValidSelectTableStatement) S
    WHERE tblNameCanBeTempTable.KeyValue =  S.keyValue

So the route is make your select statment, check it produces the values you want, then tack the update ont the beginning and the row matching WHERE on the end

You Can do things like

Col1 = CASE WHEN X=1 THEN S.Value1 ELSE Col1 END

for each row.