sql ntext 替换存储过程
sql server 数据库 ntext 字段 的替换存储过程 sqlserver数据库 ntext字段 的替换存储过程 create procedure replace_ntext @table_name nvarchar(100), --目标表名 @field_name nvarchar(100), --目标字段名 @where_str nvarchar(1000), --该表主键字段名 如
sql server 数据库 ntext 字段 的替换存储过程 sqlserver数据库 ntext字段 的替换存储过程create procedure replace_ntext @table_name nvarchar(100), --目标表名 @field_name nvarchar(100), --目标字段名 @where_str nvarchar(1000), --该表主键字段名 如id=1 @old nvarchar(1000), --需要替换的字符串 @new nvarchar(1000) --替换后的字符串 as begin declare @SqlStr nvarchar(4000) set @SqlStr = 'declare @pos int, @len int, @count int set @count=0 set @len=len('''+@old+''') ' set @SqlStr = @SqlStr + ' select @pos = patINDEX(''%'+@old+'%'',['+@field_name+']) - 1'+' from ['+@table_name+'] where '+ @where_str set @SqlStr = @SqlStr + ' while @pos>0 ' set @SqlStr = @SqlStr + ' begin' set @SqlStr = @SqlStr + ' declare @ptrval binary(16)' set @SqlStr = @SqlStr + ' SELECT @ptrval = TEXTPTR(['+@field_name+']) from ['+@table_name+'] where '+ @where_str set @SqlStr = @SqlStr + ' UPDATETEXT ['+@table_name+'].['+@field_name+'] @ptrval @pos @len '''+ @new + '''' set @SqlStr = @SqlStr + ' select @pos = patINDEX(''%'+@old+'%'',['+@field_name+']) - 1'+' from ['+@table_name+'] where '+ @where_str set @SqlStr = @SqlStr + ' set @count=@count+1 ' set @SqlStr = @SqlStr + ' end ' set @SqlStr = @SqlStr + ' select @count' --print @SqlStr execute sp_executesql @SqlStr end

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