sql server recover deleted rows

to judge repetition. For example, if only col1 is used, if the content of col1 is the same, the record is the same. 5.Copy codeThe Code is as follows: select identity (int, 1, 1) as id, * into # temp from tabelSelect * from # temp where id in (Select max (id) from # emp where having count (*)> 1 group by col1, col2, col3 ...) 6.Copy codeThe Code is as follows: select distinct * into # temp from tablenameDelete tablenameGoInsert tablename select * from # temp SqlclubGoDrop table # temp The prece

Tags: server greater than from BLE tab style not row divSQL SERVER queries data between rows 20th through 301. Query the first 20 rows of the ID, after the query to remove 20 records of the first 10 recordsSelect Top * from Tbbank WHERE bankid not in (select Top BankID from Tbbank ORDER by BankID ASC) 2. Query the firs

During database migration, SSMs is used to perform view operations. However, after the view migration is complete, configure peer-to-peer replication. In the last step, an error is reported, and the subscribed part is not created successfully. For example: There is no way to delete the peering replication and recreate it, but an error is returned when deleting it:Cannot Execute as the Database Principal because the principal "DBO" does not exist, this type of principal cannot be impersonated, o

Table2 already exists, we can insert a constant in addition to the fields Table1 the source table. 2.SELECT into from statement Statement form:SELECT vale1, value2 into Table2 from Table1 The target table Table2 does not exist because the table Table2 is created automatically at insert time and the specified field data in Table1 is copied to Table2. 5. Review the commonly used SQL method statements by the way Copy Code code as follows:

Tags: blog http data IO issues CTI Management SQLJust changed SQL Server2008Soon, the feeling of running speed, editing tips are more than the 05 version of the promotion, but in the maintenance test system encountered a 05 of the problem: 05 in the "Open Table" can edit all data rows, 08 to "Open the top 1000 lines" and "edit the Top 200 lines": The test system of data there are thousands of lines , how to

Each time you import an Excel table to the database, several more rows are displayed as 'null' rows. The following prompt is displayed when you delete the table. "The key column information is insufficient or incorrect. Update affects multiple rows! " Solution: You can see from your description that you have imported data from Excel to

1 //Query all indicateSelectName fromsysobjectswhereXtype='u'2 3 Select * fromsys.tables4 //Querying all table names and rows in the database5 6 SELECTA.name, B.rows7 8 fromsysobjects asAINNER JOINsysindexes asB ona.ID=b.id9 Ten WHERE(A.type= 'u') and(B.indidinch(0,1)) One A ORDER byA.name,b.rowsDESC - - //query all indication and space consumption \ line number the - Select - - object_name(ID) tablename, + - 8*Reserved/1024x768reserved, +

For repeated row deletion problems, it is difficult to find a suitable answer on the Internet and there are a lot of questions, but there is no solution to the previous record in the search engine. In fact, this problem can be effectively solved. 1. If the table does not have a primary key (or the same row does not have different content columns), you need to create an auto-increment column to distinguish different columns. For example Copy codeThe Code is as follows: alter table [tablename]

For repeated row deletion problems, it is difficult to find a suitable answer on the Internet and there are a lot of questions, but there is no solution to the previous record in the search engine.In fact, this problem can be effectively solved.1. If the table does not have a primary key (or the same row does not have different content columns), you need to create an auto-increment column to distinguish different columns. For exampleCopy codeThe Code is as follows:Alter table [tablename] add [TI

Label:The teammate gave me the statement to modify the data. Always fails to execute. I wonder. For example:Look carefully at this column, and there is nothing special. such as:But it does have a constraint: ' df__his_drug___all_i__04e4bc85 '. Why do we have this constraint???When I finally searched this article, I understood. Because the column ' All_inventory_state ' is assigned a default value when it is created. That's why we have this constraint.Reference:http://blog.csdn.net/rodjohnsondoct

Tags: div Select server data log row data exists in BSP spanInserting multiple rows of data, having more than one piece of data in the original table, and building a new table can be cumbersome, using the following syntax:Add data from an existing table to a table that already exists by using the Insert Select statementSyntax: Insert intoselectfromNote: The AddressList table must be pre-created and has a co

SQL merge rows As follows: ID Name 1 Tom 1 John 2 Carrier 2 Wendy 1 Rick The following results must be displayed: ID Name 1 Tom, John, Rick 2 Carrier, Wendy SQL: Select ID, (Select stuff (B. V. Value ('/R [1]', 'varchar (10

Deleting duplicate rows on SQL Server is one of the most common operations. The following describes six methods that can be used to delete duplicate rows on SQL Server for your reference. 1. If an ID field exists, it is a unique f

--Create a test tableCreate Table#Temp(seqint Identity, namesvarchar( $))Insert into#Temp(names)Values('Zhang San, John Doe'),('China, USA, Brazil'),('Shenzhen, Shanghai, Beijing, Guangzhou, Harbin'),('football, basketball, table tennis, billiards')The goal is to split the names column separated by commas into multiple rows, resulting in the result:1 sheets of three1 John Doe2 China2 USA2 Brazil3 Shenzhen3 Shanghai3 Beijing3 Guangzhou3 Harbin4 Footba