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This is often the problem with SQL Server: After a table has an AutoNumber column, the number of automatic numbers has been accumulated tens of thousands, since testing a lot of data. Now it is time to use this table, the test data has been deleted, the remaining problem is in the entry of new data, numbering will only continue to increase, has been used but dele
Tags: data div sp c SQL res table BS r1. TRUNCATE TABLE TableName2. The DBCC checkident (tablename,reseed,1) Truncate command not only clears all data, but also restores the value of the identity's seed to its original value.DBCC CHECKIDENT is more convenient, and you can specify the value of seed without deleting the data. DBCC checkident Just moves the index number of the auto-orchestration to the location you specified, but the actual number does n
Sometimes we only know the name of the column, but do not know which table the data in the end, you can use the following method to find the table containing this data. Copy Code code as follows: Select o.name objectname, c.name ColumnName from sys.columns c inner join sys.objects O on c.object_id=o.object_id where C . Name like '%columnname% ' ORDER by O.name, C.name In your actual trial, replace ColumnName with the name of the
SELECTTable name= Case whenA.colorder=1 ThenD.nameElse "' End, table describes= Case whenA.colorder=1 Then IsNull(F.value,"')Else "' End, Field ordinal=a.colorder, field name=a.name, Logo= Case when ColumnProperty(A.id,a.name,'isidentity')=1 Then '√'Else "' End, PRIMARY key= Case when exists(SELECT 1 fromsysobjectswhereXtype='PK' andParent_obj=a.ID andNameinch ( SELECTName fromsysindexesWHEREIndidinch(SELECTIndid fromSysindexkeysWHEREId=a.ID andColid=A.colid))) T
Create DATABASE Inter_transformationGoCREATE TABLE Tb(Uname varchar (30),Course varchar (30),fraction int)GoINSERT into TB values (' Zhang San ', ' language ', 74)INSERT into TB values (' Zhang San ', ' math ', 83)INSERT into TB values (' Zhang San ', ' physical ', 93)INSERT into TB values (' John Doe ', ' language ', 74)INSERT into TB values (' John Doe ', ' math ', 84)INSERT into TB values (' John Doe ', ' physical ', 94)INSERT into TB values (' Harry ', ' language ',
Copy Code code as follows: --The ranks turn /************************************************************************************************************** **************************************** Take the student achievement as the example, the comparison image is easy to understand Finishing Man: China Wind (Roy) Date: 2008.06.06 *************************************************************************************************************** ***************************************
Many people may find that there is no aggregate function for strings in SQL 2000, or in SQL 2005, so when we're dealing with the following requirements, it's a bit of a hassle, but in SQL Server 2005, this is an improvement that we can easily do. 问题描述：无论是在sql 2000， 还是在
Recently, I was working on a project with a lot of test data in the database. Later I deleted all the test data using the delete * Statement. However, I found that the base of the Self-increasing column (usually the primary key) was not zero, after reading the information, I found a solution, that is, using the TRUNCATE function, you can delete all the data in the table and set the base of the auto-growth column
The data table contains a column of data, as shown in 1: Figure 1 data table Now we need to divide the data in this column into three columns. The SQL code is as follows: 1, SelectMax (case when F1 % 3 = 1 then F1 else 0 end),Max (case when F1 % 3 = 2 then F1 else 0 end) B,Max (case when F1 % 3 = 0 then F1 else 0 end) cFrom hlr151Group by (F1-1)/3 Effect:
Label:SQL Server row and column conversion Pivot UnPivotPivot is used to rotate column values to column names (row to column), and SQL Server 2000 can be implemented with an aggregate f
The operation code for XML columns in SQLServerTable. For more information, see. The operation code of XML columns in SQL Server Table. For more information, see. The Code is as follows: -- Create a test table DECLARE @ Users TABLE ( Id int identity (1, 1 ), UserInfo XML ) --- Insert Test Data DECLARE @ xml XML SET @ xml =' 1 Test1 ' Insert into @ Users (UserInfo
CREATE PROCEDURE [dbo]. [DXD_MX]@dxd_id VARCHAR (120) = "AsBEGIN--set Nocount ONDECLARE @sql1 NVARCHAR (4000)SET @sql1 = ' SELECT * FROM (select Row_number () over (order by T1.N ASC) as m1,* from (select Row_number () over (Order by ID DESC) as N, id,dxd_id, Yqs,yhs,guanghao from Lxcy_dxd_mx_v WHERE dxd_id= "" [email protected]_id+ ' or dxd_id= ') T1 WHE RE nLeft JOIN(select Row_number () over (order by T2.N ASC) as m2,* from (select Row_number () over (order by ID DESC) as N, id,dxd_id, YQ S,y
CREATE table TB (name varchar (10), course varchar (10), fractional int)INSERT into TB values (' Zhang San ', ' language ', 74)INSERT into TB values (' Zhang San ', ' math ', 83)INSERT into TB values (' Zhang San ', ' physical ', 93)INSERT into TB values (' John Doe ', ' language ', 74)INSERT into TB values (' John Doe ', ' math ', 84)INSERT into TB values (' John Doe ', ' physical ', 94)GoSELECT * FROM TBDROP table TBSelect Name,Max (case course when ' language ' then score else 0 end) language
Label:CREATE TABLE #tp(Headerno VARCHAR (10),Machineno VARCHAR (10),Descrption NVARCHAR (20),Artno VARCHAR (20),Qty INT,Repartno varchar (20),Repqty INT) INSERT INTO #tp SELECT ' HD01 ', ' 0101520 ', N ' battery problem ', ' 102020 ', 2, ' 102020 ', 2INSERT INTO #tp SELECT ' HD01 ', ' 0101520 ', N ' battery problem ', ' 101010 ', 2, ' 202020 ', 2INSERT INTO #tp SELECT ' HD01 ', ' 0101520 ', N ' battery problem ', ' 126888 ', 2, ' 102020 ', 2INSERT INTO #tp SELECT ' HD02 ', ' 01012221 ', N ' d mo
Label:Original: How SQL Server stores an index on a variable-length columnIn this article, I want to talk about how SQL Server stores indexes on variable-length columns. First we create a table with variable-length columns, define the primary key above, define the clustered index above, and insert 80,000 records inside
In this article we will learn how to convert table rows into columns as comma seperated. -- Create a table variable to store user dataDeclare @ mytable table(Username varchar (50 ),Articlename varchar (50)) -- Insert some data to table to work on that dataInsert into @ mytable (username, articlename)Values ('jack', 'asp. net ')Insert into @ mytable (username, articlename)Values ('jack', 'SQL
The table structure we use is as follows: The relationship between the three tables is: The existing test data is as follows: The result is: Copy codeThe Code is as follows:DECLARE @ strSQL VARCHAR (8000)SET @ strSQL = 'select t. STUNAME [name]'SELECT @ strSQL = @ strSQL + ', SUM (CASE s. sname when ''' + SNAME + ''' THEN g. [Score] END) ['+ SNAME +'] 'FROM (select sname from [Subject]) AS tmpSELECT @ strSQL = @ strSQL + 'FROM [Score] g, [Subject] s, [Student] t WHERE g. SID = s. sid
Today, a vendor asked me a question. If you want to change the data type of a field in a table, whether it is a field type in view also responds to automatic changes. At that time, I thought it would be changed automatically. However, the vendors said they had tried and won't change it. They asked me if I had any other choice but to try again. At that time, I thought of the storage process sp_refreshview for refreshing the view and asked them to give it a try. After execution, the Data Type in t
The table structure we use is as follows: The relationship between the three sheets is: The existing test data is: The results we need are: Copy Code code as follows: DECLARE @strSQL VARCHAR (8000) SET @strSQL = ' SELECT t.stuname [name] ' Select @strSQL = @strSQL + ', SUM (case s.sname when ' "+ sname +" ' THEN G.[score] end) [' + sname + '] ' from (select SNA ME from [Subject]) as TMP SELECT @strSQL = @strSQL + ' from [Score] g,[subject] s, [Student] t WHERE g.si
Label:To modify the table design of a database, you can use the SQL ALTER TABLE statement, which is used to add, delete, or modify table columns in an existing table. 1> add a new column to the database table:Grammar:ALTER table name ADD column name data typeFor example: Add a new
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