最近需要批量更新表字段属性（如TBZYBRLCXXBQ201、TBZYBRLCXXBQ202、TBZYBRLCXXBQ203……）
由于表太多，所以需要使用升级脚本来批量更新表字段属性（批量增加表字段同理）
1 USE YXHIS //选择使用的数据库
2 GO
3 DECLARE CurTable CURSOR //声明游标
4 FOR
5 SELECT name FROM sysobjects where name like 'TBZYBRLCXXBQ%'
6 AND TYPE='U'
7 OPEN CurTable
8 DECLARE @TBNAME VARCHAR(20)
9 FETCH NEXT FROM CurTable INTO @TBNAME
10 WHILE (@@FETCH_STATUS <> -1)
11 BEGIN
12 if exists (select * from sysobjects where name=@TBNAME)
13 begin
14 if exists(select * from syscolumns where name='CHLYS' and id=object_id(@tbname)) //判断是否存在需要更改的列
15 begin
16 EXEC('alter table '+@TBNAME+' alter column CHLYS varchar(30)')
17 end
18 end
19 FETCH NEXT FROM CurTable INTO @TBNAME
20 END
21 CLOSE CurTable
22 DEALLOCATE CurTable
23 GO
