数据库操作--批量修改数据库表名及字段名大小写转换及首字母大写+删除没有数据无用的表

1、修改表名为小写

declare @sql varchar(300)--,@rowcount varchar(10),@dyncnum int
declare @tablename varchar(100)
declare cursor1 cursor for
select name from sysobjects where xtype = 'u' order by name
open cursor1
fetch next from cursor1 into @tablename
while @@fetch_status=0
begin
set @sql='sp_rename '''+@tablename+''','''+LOWER(@tablename)+''''
print @sql
exec(@sql)
fetch next from cursor1 into @tablename
end
close cursor1
deallocate cursor1

2、修改数据库中所用字段名为小写

declare @sql varchar(300)
declare @tablecolumnname varchar(100), @columnname varchar(100)
declare cursor1 cursor for
select b.name+'.['+a.name+']',a.name from syscolumns a ,sysobjects b where a.id = object_id(b.name) and b.xtype = 'u' and a.xtype <>189 and a.xtype <>34 and a.xtype <>35 and a.xtype <>36
open cursor1
fetch next from cursor1 into @tablecolumnname,@columnname
while @@fetch_status=0
begin
set @sql='sp_rename '''+@tablecolumnname+''','''+LOWER(@columnname)+''',''column'''
--print @sql
exec(@sql)
fetch next from cursor1 into @tablecolumnname,@columnname
end
close cursor1
deallocate cursor1

注：转为大写的表名及字段名将LOWER改为UPPER即可

3、修改表名及字段名为首字母大写

declare @tablename varchar(50)
declare @columnname varchar(50)
declare cur_table cursor for
select name from sysobjects where type='U'
open cur_table
fetch next from cur_table into @tablename
while @@fetch_status=0
begin
-----------------------------------------
declare cur_column cursor for
select name from syscolumns where id=Object_Id(@tablename)
open cur_column
fetch next from cur_column into @columnname
while @@fetch_status=0
begin
declare @ch varchar(50),@ch1 varchar(50),@uppertablename varchar(50)
set @ch=@tablename+'.'+@columnname
set @ch1=upper(substring(@columnname,1,1))+substring(@columnname,2,len(@columnname)-1)
set @uppertablename=upper(substring(@tablename,1,1))+substring(@tablename,2,len(@tablename)-1)
exec sp_rename @tablename,@uppertablename
exec sp_rename @ch,@ch1,'column'
fetch next from cur_column into @columnname
end
close cur_column
deallocate cur_column
-----------------------------------------
fetch next from cur_table into @tablename
end
close cur_table
deallocate cur_table

4、删除没有数据的表

--统计用户表

create table #t(name varchar(255), rows bigint, reserved varchar(20), data varchar(20), index_size varchar(20), unused varchar(20))
exec sp_MSforeachtable "insert into #t exec sp_spaceused '?'"
select * from #t
--drop table #t

--删除表
DECLARE @Table NVARCHAR(30)
DECLARE tmpCur CURSOR FOR
select name from #t WHERE rows=0
OPEN tmpCur
FETCH NEXT FROM tmpCur INTO @Table

WHILE @@FETCH_STATUS = 0
BEGIN
DECLARE @sql VARCHAR(100)
SELECT @sql = 'drop table ' + @Table
EXEC(@sql)
FETCH NEXT FROM tmpCur INTO @Table
END
CLOSE tmpCur
DEALLOCATE tmpCur