查找所有表和列的值SQL

Find Value Across All Tables And Columns With SQL

发布-日期: 2017年7月3日 (评论)

中文
English
SQL Logic
Build Info
Author
License

中文

这一小段SQL 逻辑（logic）将允许你在所有表和列中搜索值。跟Vyaskn搜索脚本（http://vyaskn.tripod.com）的扩展作用相同。你不仅可以查找值，还可以根据需要替换或删除它们。注意：允许通配符搜索。例如：'％find this this'

English

This little bit of SQL Logic will allow you to search for a value across all tables and columns. This is serves as an expansion on Vyaskn’s search script (http://vyaskn.tripod.com). This will allow you to not only find the values, but replace, or delete them if needed. Note: Wild card search is permitted. Example: ‘%find this%’

Logic

use [MyDatabase];
set nocount on
 
declare @find_this      varchar(255) = '%MyValue%'
 
if object_id('tempdb..#found') is not null
    drop table #found
if object_id('tempdb..#foundall') is not null
    drop table #foundall
 
create table #found     (columnname nvarchar(255), columnvalue nvarchar(3000))
create table #foundall  ([table_name] nvarchar(255), [column_name] nvarchar(255), [value] nvarchar(4000))
declare @tablename      nvarchar(256)
declare @columnname     nvarchar(128)
declare @find_this2     nvarchar(110)
set @tablename      = ''
set @find_this2     = quotename('%' + @find_this + '%','''')
 
while   @tablename is not null
begin
set @columnname     = ''
set @tablename      = 
(
select
    min(quotename(table_schema) + '.' + quotename(table_name))
from   
    information_schema.tables
where      
    table_type          = 'base table'
                    and quotename(table_schema) + '.' + quotename(table_name) > @tablename
                    and objectproperty(object_id(quotename(table_schema) + '.' + quotename(table_name)), 'ismsshipped') = 0) while 
    (@tablename is not null) and (@columnname is not null) begin
    set @columnname =(select min(quotename(column_name))
    from   
        information_schema.columns
    where      
        table_schema    = parsename(@tablename, 2)
                        and table_name  = parsename(@tablename, 1)
                        and data_type in ('char', 'varchar', 'nchar', 'nvarchar')
                        and quotename(column_name) > @columnname)
 
if @columnname is not null
begin
insert into #found
exec
('select ''' + @tablename + '.' + @columnname + ''', left(' + @columnname + ', 3630) from ' + @tablename + ' (nolock) ' +' where ' + @columnname + ' like ' + @find_this2) end end end
 
insert into #foundall
 select
    [table_name]        = reverse(substring(reverse(columnname),charindex('.',reverse(columnname))+1,len(columnname)))
,   [column_name]   = reverse(left(reverse(columnname), charindex('.', reverse(columnname)) - 1)) 
,   [value]         = columnvalue
from
    #found
order by
    [table_name]
,   [column_name] asc
 
--get all found values
--获取所有找到的值
select * from #foundall
 
--replace all found values
--替换所有找到的值
declare @replace_all_values     varchar(max)
set @replace_all_values     = ''
select  @replace_all_values     = @replace_all_values + 
' update table ' + [table_name] + ' set ' + [column_name] + ' = '' replace(' + [column_name] + ' replace, ''' + [value] + ''', ''MyNewValue'');' + char(10)
from    #foundall
 
 
--delete rows with found values
--删除包含已找到值的行
/*
declare @delete_rows        varchar(max)
set @delete_rows        = ''
select  @delete_rows        = @delete_rows + 
' delete from ' + [table_name] + ' where ' + [column_name] + ' = ''' + [value] + ''';' + char(10)
from    #foundall
 
exec    (@delete_rows) --for xml path (''), type
*/