SQL Server查询：获取另一个表的字段中不存在的列的列表

Question

I need to select all the columns names only from a SPLANNING_ROOMDATA2 table in such way that those names should not exist in a comma separated list of column names in another table. Here is my query in a C# ASP.NET application. My query generates an error like ' syntax error near Where '.

  SqlCommand cmd = new SqlCommand("select COLUMN_NAME from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME='Splanning_RoomData2' where COLUMN_NAME NOT IN (SELECT ATTRIBUTENAME FROM SPLANNING_RESTRICTED_ATTRIBUTES)", con);//get only column names

Note, if I remove the second Where clause then I do get a list of columns but that is not what I desire. I have done some searches but none met my needs.

***Edit: As of now, none of the answers are working. I am going to try to change the splanning_restricted_attributes table's to allow one restricted attributed per row--instead of comma separated one. Thanks all. **

Answer 1

You should not store lists as comma separated values. They should be in a separate table, called a junction table with one row per column and table.

Sometimes, though, you are stuck with such a structure. Here is one method for getting what you need:

select c.COLUMN_NAME
from INFORMATION_SCHEMA.COLUMNS c LEFT JOIN
     SPLANNING_RESTRICTED_ATTRIBUTES ra
     ON ',' + lower(ra.ATTRIBUTENAME) + ',' LIKE '%,' + lower(c.column_name) + ',%'
where TABLE_NAME = 'Splanning_RoomData2' and ra.ATTRIBUTENAME is null;

Answer 2

Use AND instead of WHERE twice

SqlCommand cmd = new SqlCommand("SELECT COLUMN_NAME 
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_NAME='Splanning_RoomData2' 
AND COLUMN_NAME NOT IN (SELECT ATTRIBUTENAME 
                        FROM SPLANNING_RESTRICTED_ATTRIBUTES)", con);

Answer 3

I am just posting the updated answer of @Gordon Linoff answer try the query as,

select c.COLUMN_NAME
from INFORMATION_SCHEMA.COLUMNS c JOIN
     SPLANNING_RESTRICTED_ATTRIBUTES ra
     ON ',' + lower(ra.ATTRIBUTENAME) + ',' NOT LIKE '%,' + lower(c.column_name) + ',%'
where c.TABLE_NAME = 'Splanning_RoomData2';