declare @rows int,
        @row  int,
        @TabName    varchar(128),
        @strSql        varchar(512),
        @Column        varchar(32), -- 要修改的列名
        @DataType    varchar(32)     -- 要修改的类型
set @Column = 'name'
set @DataType = 'varchar(128)'
declare @t table (Row int identity(1,1),TableName varchar(128))
insert into @t
select b.name from sys.columns a inner join sys.tables b on a.object_id = b.object_id
where a.name = @Column
set @rows = @@ROWCOUNT
set @row = 1
while(@row <= @rows)
begin
    select @TabName = TableName from @t where Row = @row

    set @strSql = ' alter table '+ @TabName
                 +' alter column name ' + @DataType
    exec (@strSql)
    set @row = @row + 1
end

------解决方案--------------------
动态产生SQL语句,批量执行.
SQL code

select N'alter table ['+a.name+N' ] alter column ['+b.name+N'] varchar([长度]) '
from sys.tables a
inner join sys.columns b on a.object_id=b.object_id
where b.name='[字段名]'

------解决方案--------------------
探讨

引用:
动态产生SQL语句,批量执行.

SQL code

select N'alter table ['+a.name+N' ] alter column ['+b.name+N'] varchar([长度]) '
from sys.tables a
inner join sys.columns b on a.object_id=b.object_id
wher……