给定一个数字,我如何发现在什么表和列中可以找到它?
我不在乎速度快不快,只要管用就行。
给定一个数字,我如何发现在什么表和列中可以找到它?
我不在乎速度快不快,只要管用就行。
当前回答
在这里,非常甜蜜和小的解决方案:
1) create a store procedure:
create procedure get_table
@find_str varchar(50)
as
begin
declare @col_name varchar(500), @tab_name varchar(500);
declare @find_tab TABLE(table_name varchar(100), column_name varchar(100));
DECLARE tab_col cursor for
select C.name as 'col_name', T.name as tab_name
from sys.tables as T
left outer join sys.columns as C on C.object_id=T.object_id
left outer join sys.types as TP on C.system_type_id=TP.system_type_id
where type='U'
and TP.name in('text','ntext','varchar','char','nvarchar','nchar');
open tab_col
fetch next from tab_col into @col_name, @tab_name
while @@FETCH_STATUS = 0
begin
insert into @find_tab
exec('select ''' + @tab_name + ''',''' + @col_name + ''' from ' + @tab_name +
' where ' + @col_name + '=''' + @find_str + ''' group by ' +
@col_name + ' having count(*)>0');
fetch next from tab_col into @col_name, @tab_name;
end
CLOSE tab_col;
DEALLOCATE tab_col;
select table_name, column_name from @find_tab;
end
==========================
2) call procedure by calling store procedure:
exec get_table 'serach_string';
其他回答
您可能需要为数据库构建一个倒立索引。它肯定是相当快的。
假设您想要获取数据库中所有具有名称的表,列名包含logintime,下面的MyDatabase是代码示例
use MyDatabase
SELECT t.name AS table_name,
SCHEMA_NAME(schema_id) AS schema_name,
c.name AS column_name
FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name LIKE '%logintime%'
ORDER BY schema_name, table_name;
我之前有一个解决方案,我一直在改进。如果被告知在XML列中搜索,或者如果只提供整数字符串则搜索整数值。
/* Reto Egeter, fullparam.wordpress.com */
DECLARE @SearchStrTableName nvarchar(255), @SearchStrColumnName nvarchar(255), @SearchStrColumnValue nvarchar(255), @SearchStrInXML bit, @FullRowResult bit, @FullRowResultRows int
SET @SearchStrColumnValue = '%searchthis%' /* use LIKE syntax */
SET @FullRowResult = 1
SET @FullRowResultRows = 3
SET @SearchStrTableName = NULL /* NULL for all tables, uses LIKE syntax */
SET @SearchStrColumnName = NULL /* NULL for all columns, uses LIKE syntax */
SET @SearchStrInXML = 0 /* Searching XML data may be slow */
IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results
CREATE TABLE #Results (TableName nvarchar(128), ColumnName nvarchar(128), ColumnValue nvarchar(max),ColumnType nvarchar(20))
SET NOCOUNT ON
DECLARE @TableName nvarchar(256) = '',@ColumnName nvarchar(128),@ColumnType nvarchar(20), @QuotedSearchStrColumnValue nvarchar(110), @QuotedSearchStrColumnName nvarchar(110)
SET @QuotedSearchStrColumnValue = QUOTENAME(@SearchStrColumnValue,'''')
DECLARE @ColumnNameTable TABLE (COLUMN_NAME nvarchar(128),DATA_TYPE nvarchar(20))
WHILE @TableName IS NOT NULL
BEGIN
SET @TableName =
(
SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
AND TABLE_NAME LIKE COALESCE(@SearchStrTableName,TABLE_NAME)
AND QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
AND OBJECTPROPERTY(OBJECT_ID(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME)), 'IsMSShipped') = 0
)
IF @TableName IS NOT NULL
BEGIN
DECLARE @sql VARCHAR(MAX)
SET @sql = 'SELECT QUOTENAME(COLUMN_NAME),DATA_TYPE
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(''' + @TableName + ''', 2)
AND TABLE_NAME = PARSENAME(''' + @TableName + ''', 1)
AND DATA_TYPE IN (' + CASE WHEN ISNUMERIC(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(@SearchStrColumnValue,'%',''),'_',''),'[',''),']',''),'-','')) = 1 THEN '''tinyint'',''int'',''smallint'',''bigint'',''numeric'',''decimal'',''smallmoney'',''money'',' ELSE '' END + '''char'',''varchar'',''nchar'',''nvarchar'',''timestamp'',''uniqueidentifier''' + CASE @SearchStrInXML WHEN 1 THEN ',''xml''' ELSE '' END + ')
AND COLUMN_NAME LIKE COALESCE(' + CASE WHEN @SearchStrColumnName IS NULL THEN 'NULL' ELSE '''' + @SearchStrColumnName + '''' END + ',COLUMN_NAME)'
INSERT INTO @ColumnNameTable
EXEC (@sql)
WHILE EXISTS (SELECT TOP 1 COLUMN_NAME FROM @ColumnNameTable)
BEGIN
PRINT @ColumnName
SELECT TOP 1 @ColumnName = COLUMN_NAME,@ColumnType = DATA_TYPE FROM @ColumnNameTable
SET @sql = 'SELECT ''' + @TableName + ''',''' + @ColumnName + ''',' + CASE @ColumnType WHEN 'xml' THEN 'LEFT(CAST(' + @ColumnName + ' AS nvarchar(MAX)), 4096),'''
WHEN 'timestamp' THEN 'master.dbo.fn_varbintohexstr('+ @ColumnName + '),'''
ELSE 'LEFT(' + @ColumnName + ', 4096),''' END + @ColumnType + '''
FROM ' + @TableName + ' (NOLOCK) ' +
' WHERE ' + CASE @ColumnType WHEN 'xml' THEN 'CAST(' + @ColumnName + ' AS nvarchar(MAX))'
WHEN 'timestamp' THEN 'master.dbo.fn_varbintohexstr('+ @ColumnName + ')'
ELSE @ColumnName END + ' LIKE ' + @QuotedSearchStrColumnValue
INSERT INTO #Results
EXEC(@sql)
IF @@ROWCOUNT > 0 IF @FullRowResult = 1
BEGIN
SET @sql = 'SELECT TOP ' + CAST(@FullRowResultRows AS VARCHAR(3)) + ' ''' + @TableName + ''' AS [TableFound],''' + @ColumnName + ''' AS [ColumnFound],''FullRow>'' AS [FullRow>],*' +
' FROM ' + @TableName + ' (NOLOCK) ' +
' WHERE ' + CASE @ColumnType WHEN 'xml' THEN 'CAST(' + @ColumnName + ' AS nvarchar(MAX))'
WHEN 'timestamp' THEN 'master.dbo.fn_varbintohexstr('+ @ColumnName + ')'
ELSE @ColumnName END + ' LIKE ' + @QuotedSearchStrColumnValue
EXEC(@sql)
END
DELETE FROM @ColumnNameTable WHERE COLUMN_NAME = @ColumnName
END
END
END
SET NOCOUNT OFF
SELECT TableName, ColumnName, ColumnValue, ColumnType, COUNT(*) AS Count FROM #Results
GROUP BY TableName, ColumnName, ColumnValue, ColumnType
来源: http://fullparam.wordpress.com/2012/09/07/fck-it-i-am-going-to-search-all-tables-all-collumns/
使用JOIN和CURSOR的另一种方法:
USE My_Database;
-- Store results in a local temp table so that. I'm using a
-- local temp table so that I can access it in SP_EXECUTESQL.
create table #tmp (
tbl nvarchar(max),
col nvarchar(max),
val nvarchar(max)
);
declare @tbl nvarchar(max);
declare @col nvarchar(max);
declare @q nvarchar(max);
declare @search nvarchar(max) = 'my search key';
-- Create a cursor on all columns in the database
declare c cursor for
SELECT tbls.TABLE_NAME, cols.COLUMN_NAME FROM INFORMATION_SCHEMA.TABLES AS tbls
JOIN INFORMATION_SCHEMA.COLUMNS AS cols
ON tbls.TABLE_NAME = cols.TABLE_NAME
-- For each table and column pair, see if the search value exists.
open c
fetch next from c into @tbl, @col
while @@FETCH_STATUS = 0
begin
-- Look for the search key in current table column and if found add it to the results.
SET @q = 'INSERT INTO #tmp SELECT ''' + @tbl + ''', ''' + @col + ''', ' + @col + ' FROM ' + @tbl + ' WHERE ' + @col + ' LIKE ''%' + @search + '%'''
EXEC SP_EXECUTESQL @q
fetch next from c into @tbl, @col
end
close c
deallocate c
-- Get results
select * from #tmp
-- Remove local temp table.
drop table #tmp
这是我对这个问题的独立看法,我用在我自己的工作中。它可以在SQL2000及更高版本中工作,允许通配符、列过滤,并搜索大多数常规数据类型。
伪代码描述可以选择* from *,其中任何类似'foo'的地方
--------------------------------------------------------------------------------
-- Search all columns in all tables in a database for a string.
-- Does not search: image, sql_variant or user-defined types.
-- Exact search always for money and smallmoney; no wildcards for matching these.
--------------------------------------------------------------------------------
declare @SearchTerm nvarchar(4000) -- Can be max for SQL2005+
declare @ColumnName sysname
--------------------------------------------------------------------------------
-- SET THESE!
--------------------------------------------------------------------------------
set @SearchTerm = N'foo' -- Term to be searched for, wildcards okay
set @ColumnName = N'' -- Use to restrict the search to certain columns, wildcards okay, null or empty string for all cols
--------------------------------------------------------------------------------
-- END SET
--------------------------------------------------------------------------------
set nocount on
declare @TabCols table (
id int not null primary key identity
, table_schema sysname not null
, table_name sysname not null
, column_name sysname not null
, data_type sysname not null
)
insert into @TabCols (table_schema, table_name, column_name, data_type)
select t.TABLE_SCHEMA, c.TABLE_NAME, c.COLUMN_NAME, c.DATA_TYPE
from INFORMATION_SCHEMA.TABLES t
join INFORMATION_SCHEMA.COLUMNS c on t.TABLE_SCHEMA = c.TABLE_SCHEMA
and t.TABLE_NAME = c.TABLE_NAME
where 1 = 1
and t.TABLE_TYPE = 'base table'
and c.DATA_TYPE not in ('image', 'sql_variant')
and c.COLUMN_NAME like case when len(@ColumnName) > 0 then @ColumnName else '%' end
order by c.TABLE_NAME, c.ORDINAL_POSITION
declare
@table_schema sysname
, @table_name sysname
, @column_name sysname
, @data_type sysname
, @exists nvarchar(4000) -- Can be max for SQL2005+
, @sql nvarchar(4000) -- Can be max for SQL2005+
, @where nvarchar(4000) -- Can be max for SQL2005+
, @run nvarchar(4000) -- Can be max for SQL2005+
while exists (select null from @TabCols) begin
select top 1
@table_schema = table_schema
, @table_name = table_name
, @exists = 'select null from [' + table_schema + '].[' + table_name + '] where 1 = 0'
, @sql = 'select ''' + '[' + table_schema + '].[' + table_name + ']' + ''' as TABLE_NAME, * from [' + table_schema + '].[' + table_name + '] where 1 = 0'
, @where = ''
from @TabCols
order by id
while exists (select null from @TabCols where table_schema = @table_schema and table_name = @table_name) begin
select top 1
@column_name = column_name
, @data_type = data_type
from @TabCols
where table_schema = @table_schema
and table_name = @table_name
order by id
-- Special case for money
if @data_type in ('money', 'smallmoney') begin
if isnumeric(@SearchTerm) = 1 begin
set @where = @where + ' or [' + @column_name + '] = cast(''' + @SearchTerm + ''' as ' + @data_type + ')' -- could also cast the column as varchar for wildcards
end
end
-- Special case for xml
else if @data_type = 'xml' begin
set @where = @where + ' or cast([' + @column_name + '] as nvarchar(max)) like ''' + @SearchTerm + ''''
end
-- Special case for date
else if @data_type in ('date', 'datetime', 'datetime2', 'datetimeoffset', 'smalldatetime', 'time') begin
set @where = @where + ' or convert(nvarchar(50), [' + @column_name + '], 121) like ''' + @SearchTerm + ''''
end
-- Search all other types
else begin
set @where = @where + ' or [' + @column_name + '] like ''' + @SearchTerm + ''''
end
delete from @TabCols where table_schema = @table_schema and table_name = @table_name and column_name = @column_name
end
set @run = 'if exists(' + @exists + @where + ') begin ' + @sql + @where + ' print ''' + @table_name + ''' end'
print @run
exec sp_executesql @run
end
set nocount off
我没有把它放在proc形式中,因为我不想在数百个db中维护它,而且它实际上是用于临时工作的。请随意评论错误修复。