sql server recover deleted rows

Query all indicates that the select name from sysobjects where xtype= ' u ' select * from sys.tables//queries the database for all table names and row counts select A.name, B.rowsfrom syso Bjects as a INNER JOIN sysindexes as B on a.id = b.idwhere (A.type = ' u ') and [B.indid in (0, 1)] ORDER by A.name,b.rows DE sc//query all marked and space consumption \ line number Selectobject_name (ID) tablename,8*reserved/1024 Reserved,rtrim (8*dpages) + ' KB ' used,8* ( reserved-dpages)/1024 unused,8*dpa

and from this table column: Keywords through a derived table connection to uf_splitstringtotable (filehistory.keywords). The specific code is as follows: SELECTt1.[Id], T1.[Keywords], T1.[FileName], T1.[fileextension], T1.[Createduser], T1.[Createdtime], T1.[Importtype], i.item as keyword fromfilehistory T1OUTERAPPLY uf_splitstringtotable (t1. Keywords,',') I After the code executes successfully, the following results are returned: In this way, we can finish the results we need. 2015,fighting

1. If an ID field exists, it is a unique field.Copy codeThe Code is as follows:Delect table where id not in (Select max (id) from table group by col1, col2, col3...) The field followed by the group by clause is the condition for you to judge repetition. For example, if only col1 is used, if the content of col1 is the same, the record is the same.2. This can also be used to determine all fields.Copy codeThe Code is as follows:Select * into # aa from table group by id1, id2 ,....Delete tableInsert

Where has count (*) >1 GROUP BY Col1,col2,col3,col4 ) The field followed by the GROUP BY clause is the condition that you use to determine the repetition, such as only col1, so as long as the content of the Col1 field is the same as that of the record. 5. Copy Code code as follows: Select Identity (int,1,1) as id,* into #temp from tabel SELECT * from #temp where ID in ( Select Max (ID) from #emp where has count (*) >1 GROUP by col1,col2,col3 ...) 6.

: Table_source Pivot (aggregate function (Value_column) pivot_column for (columnlist)) A little explanation: Table_source: Is the table we want to convert. Pivot_column: Is the column name for row to column. Value_column: Is the value of the column after the conversion. Columnlist is the column to be generated. This is also the case with pivot, which can be used to write the same result: Select Studentname, [Chinese] Chinese, [math] math, [English] 中文版 from (SELECT * from

We all know that using the aggregate function count () can calculate the number of rows in the table. To count the number of rows of each table in the database (DBA may have this requirement), use the count () function to generate a dynamic SQL statement for each table and execute it to obtain the result. I used to see a good solution on the internet. I forgot th

The question of how to dynamically number rows in SQL, plus line numbers, is a classic problem in database queries. I'll sort out the present method and share the skills. The code is based on the pubs boilerplate database. In SQL, these two methods are generally: 1. Use of temporary tables You can use SELECT into to create a temporary table, in the first column

For repeated row deletion problem, the Internet is difficult to find the right answer, ask a lot of questions, but in the search engine cursory look at the previous record there is no solution. In fact, this problem can be very gorgeous solution. 1, if the table does not have a primary key (or the same row does not have a different content column), you need to create a new self column, to distinguish between different columns. For example Copy Code code as follows: ALTER TABLE [t

Querying all table names select name from sysobjects where xtype= ' u 'SELECT name, object_id, principal_id, schema_id, parent_object_id, type, Type_desc, Create_date, Modify_date, Is_ms_sh ipped, is_published,Is_schema_published, lob_data_space_id, filestream_data_space_id, max_column_id_used, Lock_on_bulk_load, Uses_ansi_ Nulls, is_replicated,Has_replication_filter, is_merge_published, is_sync_tran_subscribed, Has_unchecked_assembly_data, Text_in_row_ LimitLarge_value_types_out_of_rowFrom Sys.

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declare @low int, @unit varchar (), @val decimal (18,4)Set @unit = ' KB 'Set @val = case when @unit = ' KB ' then 1024x768 when @unit = ' MB ' then 1024*1024 else 1 endSelect @low = D.low from Master.dbo.spt_values dwhere D.number = 1 and D.type = ' E 'SELECT A.name, B.rows, LTrim (str (b.reserved * @low/@val, 15,0) + "+ @unit), LTrim (str (b.used * @low/@val, 15,0) + "+ @unit)From sysobjects as aINNER JOIN sysindexes as B on a.id = b.IDWHERE (A.type = ' u ') and (B.indid in (0, 1))ORDER by B.ro

User_student (St_name,class,score)Values (' Zhang Si ', ' a ', ' 65 ')Insert into User_student (St_name,class,score)VALUES (' Five ', ' a ', ' 88 ')Insert into User_student (St_name,class,score)VALUES (' Lie triple ', ' B ', ' 97 ')Insert into User_student (St_name,class,score)VALUES (' John Doe ', ' B ', ' 88 ')Insert into User_student (St_name,class,score)VALUES (' Lee ', ' B ', ' 78 ')Insert into User_student (St_name,class,score)VALUES (' Wang San ', ' C ', ' 86 ')Insert into User_student (

server|sqlserver| Recovery | Data provides a stored procedure for this type of recovery in SQL Server. A database consists of two files, MDF database files and LDF log files 1.sp_attach_db [@dbname =] ' dbname ', [@filename1 =] ' Filename_n ' Add a database to the system, specify the database name in dbname, filename_n the file and log files for the specified dat

Label:Original: SQL Server window functions: rows and RangeAlmost every time I show a window in SQL Server, people are very interested to know the difference betweenrows and the RANGE option when you define your window (a specified set of

Label:Almost every time I show a window in SQL Server, people are very interested to know the difference betweenrows and the RANGE option when you define your window (a specified set of rows). So in today's article I want to show you the difference between these options and what it means for your analytical calculations. the difference between

then replace the data file of the new library with the attached failed data file, and then set the database as the Emergency Recovery mode, so that the data can be read in generalALTER DATABASE db_name SET EMERGENCYAfter the database can be read, you can try to set it to ONLINE mode, if successful, then DBCC CHECKDB once, confirm no problemIf you can't online, you probably have to create a new library and then take the data from the contingency mode library to the new library.Special Note: The

'+ident_incr('Student ') SQL returns the number of rows affected by the previous statement: @ @ROWCOUNT Returns the number of rows affected (insert, select, Delete, update): 1 Select * from where S_sex=' female ' 2 3Select @@ ROWCOUNT -- return 6 If the number of rows is greater than 2 billion, use Rowcount_big

The first two days saw a blog post about how to convert a row of data that contains a single column of multiple values into a multi-row column in Oracle, with the following issues.ID number1 137xxxx,138xxxxTake it out.ID number1 137xxxx1 138xxxxThe solution given in the original text can be found in http://www.cnblogs.com/myjoan/p/4139348.html, and the reply seems to give a more concise wording.Because for several years did not touch Oracle, in recent years have been using Microsoft's

The way in Sqlazure:SelectT.name, S.row_count fromsys.tables TJoinsys.dm_db_partition_stats S onT.object_id =S.object_id andT.type_desc= 'user_table' andT.name not like '%dss%' ands.index_id= 1Order byRow_countdescSQL Server Mode:SelectA.name as 'Table name', B.rows as 'number of table data rows' fromsysobjects aInner Joinsysindexes b ona.ID=b.idwhereA.type= 'u' andB.indidinch(0,1)--and a.name not like '

Tags: data usage exp Data character rom specify CTE insertSample table TB data is as follows ID value—————1 AA1 BB2 AAA2 BBB2 CCC SELECT ID,[Val] = (SELECT [value] + ', 'From TB as BWHERE b.id = a.id for XML PATH ("))From TB as a Show results1 AA,BB,1 AA,BB,2 AAA,BBB,CCC,2 AAA,BBB,CCC,2 AAA,BBB,CCC, SELECT ID,[Val]= (SELECT [value] + ', 'From TB as BWHERE b.id = a.idFor XML PATH (")")From TB as aGROUP by IDShow results1 AA,BB,2 AAA,BBB,CCC, SELECT ID,[Val]=stuff (SELECT ', ' +[value ')From TB a