Question

我有很多表，名称以Lookup_开头。如何在每个这样的表中更改列Name？

Answer 1

我不太确定你想用Name做什么，但这是你把它改成nvarchar（20）的方法。

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

Answer 2

这看起来好多了

exec sp_msforeachtable 
    @command1 = 'alter table ? alter column name nvarchar(20)'
    , @whereand = 'and left(o.name, 7) = ''lookup_'' and o.type = ''U'''

对许多表执行alter

2 个答案: