。。。。。SQl 修改多表的同一字段类型长度
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alter table 表
alter column 字段名 更改后的类型
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- SQL code
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 @tselect b.name from sys.columns a inner join sys.tables b on a.object_id = b.object_idwhere a.name = @Columnset @rows = @@ROWCOUNTset @row = 1while(@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 + 1end
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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 ainner join sys.columns b on a.object_id=b.object_idwhere b.name='[字段名]'
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