table structure in sql server

(SELECT * from INSERTED) and is EXISTS (SELECT * from DELETED)----Insertbeginset @acti on= ' INSERT ' endelse IF not EXISTS (SELECT * from INSERTED) and EXISTS (SELECT * from DELETED)----Deletebegin SET @actio n= ' DELETE ' endelse IF EXISTS (SELECT * from INSERTED) and EXISTS (SELECT * from DELETED)-----updatebegin SET @action = ' UPDATE ' Endselect row_number () over (ORDER by Dataareaid) rowid,description,code,category,getdate () Modifieddatetime, ModifiEdby,getdate () createddatetime,create

Oracle database The process of creating temporary tables and the contrast with the different points of the SQL Server Temp table is the main content of this article, let's take a look at this part of the content, we hope to be able to help you. 1. Introduction In addition to saving permanent tables, Oracle databases can also create temporary tables temporary ta

The following is an example:Two tables, SourceTable and TargetTable, are logon tables. If the user accesses the login table, update the authorization level of the authorization table. Otherwise, authorization 0 indicates the visitor. The SQL statement is as follows:-- SourceTable: logon table, TargetTable: Authorizatio

Summary: This article describes how Microsoft SQL Server queries are handled on a client computer, how various clients interact with SQL Server, and what SQL Server needs to do to handle requests from client programs. Brief intro

Index this block from the storage structure, there are 2 categories, clustered index and nonclustered index, and non-clustered index in the heap table or in the clustered Index table will affect its key value, this block can be detailed view of the second article of this series: SQL

When a user changes the table structure in SQL Server 2008 Enterprise Manager, you must delete the original table and recreate the new table to complete the table changes, and if you fo

) + "" " --datetime when @xtype= - Then "" "+convert (char),'+@name+', +) + "" " --smalldatetime when @xtype= $ Then "" "+convert (char),'+@name+')+ "" " --uniqueidentifier Else @name End End End Fetch Next fromSyscolumns_cursor into @name,@xtype End CloseSyscolumns_cursordeallocateSyscolumns_cursorSet @sql='SET NOCOUNT ON select"'Insert into'+@tablename+'('+@colum

the rest of the afternoon was thrown to a task: To import street data from across the country into a street table. But the SQL script they threw me was down from the web, completely different from the database design on this side of the platform. the idea was to first generate a table locally on the script that was thrown at me, and then select the data you want

Label:Temporary tables and table variables can play a "temporary" role, so what are the main differences between the two?This is not discussed here, as well as the global temporary table, the session temporary table these, the main record of the individual on the main difference between the two and the application of the view, there is nothing wrong or complement

The Data Page Structure of SQLSERVER is frequently asked in the forum how SQLSERVER stores basic table data. Since I do not want to check MSDN, here I will explain how each row of data is stored on the data page? Structure composition: Each SQLSERVER data page is roughly divided into three parts: the page header, the offset at the end of the page, and the data st

When IDENTITY_INSERT is set to OFF, you cannot insert an explicit value into the identity column in table ' #TT '.I was in SQL Server to write the stored procedure encountered this error, then thought: how the temporary table has a primary key, I also did not set the primary key.Then I worked with my colleagues to debu

Server Partitioned TableScalability is an important aspect of a database management system that provides table partitioning capabilities in terms of scalability in SQL Server 2005.In fact, for the relational database products, the table, database and

SQL Server lock table, unlock, and view sale table, Lock a table in the database Copy codeThe Code is as follows:SELECT * FROM table WITH (HOLDLOCK) Note: What is the difference between locking a database

Lock a table in a database The code is as follows Copy Code SELECT * from table with (HOLDLOCK) Note: The difference between a table that locks a database The code is as follows Copy Code SELECT * from table with (HOLDLOCK) Other transactions

Nonclustered indexes have the same B-tree structure as clustered indexes, and the significant difference between them is the following two points: The data rows of the underlying table are not sorted and stored in the order of the nonclustered keys. The leaf layer of a nonclustered index is made up of index pages rather than data pages. Nonclustered indexes can be built either on a heap

DELETE from [dbo].[Test] WHERE /** * Warning:where CLAUSE for this STATEMENT is GENERATED for A TABLE with no PRIMARY KEY and no CLUSTERED INDEX ***/[ID] = 1 and [name] =N'AAAA'COLLATE chinese_prc_ci_asIF @ @ROWCOUNT 1 COMMIT TRANSACTION ELSE BEGIN ROLLBACK TRANSACTION;PRINT 'error:statement affected more THAN one ROW. All the changes were rolled back.' END -- redo INSERT (0000001e:00000047:0013) Done At 2018-07-29 09:49:55.570 by HSR-PC\HSR in t

Tags: score create system identifier check common whitespace graphical ssmsKnowledge section1. SQL Server Data type• Data type is a property of the data used to define the data as time, number, string (text, letter), etc.· SQL Server provides a set of system data types that define all data types that can be used with

Lock a table in a database Copy Code code as follows: SELECT * from table with (HOLDLOCK) Note: The difference between a table that locks a database Copy Code code as follows: SELECT * from table with (HOLDLOCK) Other transactions can read the

1. Determine if the data table existsMethod One:Use Yourdb;GoIf OBJECT_ID (n ' tablename ', n ' U ') is not nullprint ' exists 'Elseprint ' does not exist 'For example:Use Fireweb;GoIf OBJECT_ID (n ' temp_tbl ', n ' U ') is not nullprint ' exists 'Elseprint ' does not exist 'Method Two:Use [instance name]GOIF EXISTS (SELECT * FROM dbo. SysObjects WHERE id = object_id (N ' [table name] ') and OBJECTPROPERTY

intoScoreValues(3,'3-105', -)Insert intoScoreValues(4,'3-105', -)Insert intoScoreValues(5,'3-105', -)Insert intoScoreValues(6,'3-105', -)--Business: To ensure the complete implementation of the entire process, all without problems, unified submission, once there is a problem, back to the origin. Like bank transfers.Begin Tran--z The start of the transaction--start writing the process statement--After the statement is finishedIf @ @ERROR >0Rollback tran--ROLLBACK TRANSACTIONElseCommit Tran--