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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
--Requirements change, need to add a foreigner name to the F_username field of the T_login table, the previous set of varchar (10) is not enough, the negotiation decision to change to varchar (30), when executing, the message index ' Uq_f_username ' depends on the column ' F_ UserName '. ALTER TABLE ALTER COLUMN F_USER
Location:In Microsoft.SqlServer.Management.Common.ServerConnection.ExecuteNonQuery (String SqlCommand, executiontypes Executiontype) in Microsoft.SqlServer.Management.Common.ServerConnection.ExecuteNonQuery (stringcollection Sqlcommands, Executiontypes Executiontype) in Microsoft.SqlServer.Management.Smo.ExecutionManager.ExecuteNonQuery ( StringCollection queries) in Microsoft.SqlServer.Management.Smo.Database.SetOfflineImpl (Boolean offline)===================================
When modifying the SQL Server table structure, we often use the alter statement to list some commonly used alter statements as follows. 1: add fields to the table Alter table [Table name] add [column name] Type 2: delete a f
Label:Environment: Non-domain environmentBecause it is automatic failover, need to join witness, transaction security mode is, strong security full modeWhen you do the final step, you may encounterExecution (Alter DATABASE [mirrortest] SET WITNESS = ' tcp://xxxx:5022 '-) Error resolution message 1456, Level 16, State 3, line 4th cannot be alter D The atabase command is sent to the remote
When modifying the SQL Server table structure, use the ALTER statement to enumerate some commonly used alter statements as follows.1: Add a field to the tableAlter table [table name] add [column name] Type2: Delete FieldAlter table [table name] Drop
I recently studied sqlserver database .. I have not been familiar with it for a long time. I often encounter some alter statements, and I have learned some about it in my spare time. the following example uses the table structure createdatabaseText_DBgouseText_DBgocreatetableTeacher ( I recently studied sqlserver database .. I have not been familiar with it for a long time. I often encounter some alter stat
SQL Server obtains all column names in the temporary table or whether the specified column name exists. SQL Server column names Retrieve all colum
Tags: Time characteristics Law object_id LTE Eric modify alter typeOriginal: Use SQL statement to create a modified SQL Server identity column (that is, autogrow column)I. Definition and characteristics of the identity columnThe i
UNION All SELECTN'Zhang San'N'English', -GOSELECT * from [Testrows2columns](Figure 2: Sample Data)(b) First, a static way to achieve row to column, the effect of 3 is shown:--1: Static splicing row to columnSELECT [UserName],SUM( Case [Subject] when 'Mathematics' Then [Source] ELSE 0 END) as '[Mathematics]',SUM( Case [Subject] when 'English' Then [Source] ELSE 0 END) as '[English]',SUM( Case [Subject] when 'language' Then [Source] ELSE 0
UNION All SELECTN'Zhang San'N'English', -GOSELECT * from [Testrows2columns](Figure 2: Sample Data)(b) First, a static way to achieve row to column, the effect of 3 is shown:--1: Static splicing row to columnSELECT [UserName],SUM( Case [Subject] when 'Mathematics' Then [Source] ELSE 0 END) as '[Mathematics]',SUM( Case [Subject] when 'English' Then [Source] ELSE 0 END) as '[English]',SUM( Case [Subject] when 'language' Then [Source] ELSE 0
1: Add a field to the tableAlter table [table name] add [column name] Type2: Delete FieldAlter table [table name] Drop column [column name]3: Modify the field type in the table (you can modify the type of the column, whether it is empty)ALTER TABLE [table name]
) SELECT @sql =isnull (@ Sql+ ', ', ') + course from TB GROUP by course SET @sql = ' SELECT * from TB pivot (MAX (score) for course in (' [email protected]+ ')) a ' exec (@sql) The results of the row and column are combined with the total score, t
' English ', 100 GO SELECT * FROM [Testrows2columns] (Figure 2: Sample Data) (b) First, a static way to achieve row to column, the effect of 3 is shown: --1: Static splicing row to column SELECT [UserName], SUM (case [Subject] when ' math ' then [Source] ELSE 0 END) as ' [Math] ', SUM (case [Subject] when ' English ' then [Source] ELSE 0 END)
Label:I. Definition and characteristics of the identity columnThe identity column in SQL Server is also called the identifier column, which is also known as the self-increment column.This type of column has the following three characteristics:1. The data type of the
Http://blog.csdn.net/xys_777/archive/2010/06/22/5685953.aspx Summary of Row-to-column conversion problems-1. Row-to-column conversion (various problems in the forum will be sorted out later) --- 1. Simplest row-to-column Conversion/* Question: Suppose there is a student orders table (TB) as follows:Name course scoreZhang San Language 74James math 83Zhang San phys
Label:SQL Server dynamic row to column (parameterized table name, grouping column, row to column field, field value)2014-05-26 16:09 by listening to the wind blowing rain, 26798 reading, 50 Reviews, Favorites, compilation I. What is covered in this article (Contents) What is covered in this article (Contents
Summary of Row-to-column conversion problems-1. Row-to-column conversion (various problems in the forum will be sorted out later) --- 1. Simplest row-to-column Conversion/* Question: Suppose there is a student orders table (TB) as follows:Name course scoreZhang San Language 74James math 83Zhang San physical 93Li Si language 74Li Si mathematics 84Li Si physical 94
Summary of Row-to-column conversion problems-1. Row-to-column conversion (various problems in the forum will be sorted out later) --- 1. Simplest row-to-column Conversion/* Question: Suppose there is a student orders table (TB) as follows:Name course scoreZhang San Language 74James math 83Zhang San physical 93Li Si language 74Li Si mathematics 84Li Si physical 94
@sql = ' Select * FROM TB Pivot (MAX (score) for course in (' [email protected]+ ')) a ' EXEC (@sql)The results of the row and column are combined with the total score, the average1. Using SQL Server 2000 static SQLSELECT name, Max (case course when ' language ' then score
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