São expressões corretas no MS SQL Server, os exemplos:

✂️ a) DROP COLUMN table_name column_name e
SELECT FROM table_name
AVG(column_nam

✂️ b) DROP INDEX index_name ON table_name e
SELECT FROM table_name
AVG(column_nam

✂️ c) DROP COLUMN table_name column_name e
SELECT AS alias_name column_name(s)
FROM table_name

✂️ d) DROP INDEX index_name ON table_name e
ALTER COLUMN TABLE table_name
column_name datatype

✂️ e) DROP INDEX table_name.index_name e
SELECT column_name(s)
FROM table_name WHERE column_name
IN (value1,value2,...)

Responda: São expressões corretas no MS SQL Server, os exemplos: