Question

I have many tables, which names start with Lookup_. How can I alter column Name in every such table?

Answer 1

I am not quite sure what you want to do with Name, but this is how you change it to nvarchar(20).

Declare @sql as nvarchar(500)
Declare TableCursor CURSOR FAST_FORWARD FOR
SELECT 'alter table ' + table_schema + '.'+ table_name +' alter column name nvarchar(20)' FROM INFORMATION_SCHEMA.TABLES
WHERE left(table_name, 7) = 'lookup_' and table_type = 'BASE TABLE'

OPEN TableCursor
FETCH NEXT FROM TableCursor
INTO @sql
WHILE @@FETCH_STATUS = 0
BEGIN
     EXEC (@sql)
     FETCH NEXT FROM TableCursor
     INTO @sql
END
CLOSE TableCursor
DEALLOCATE TableCursor