temporal tables sql server

SELECTTable name = D.name,Table Description = case when a.colorder=1 then IsNull (F.value, ') Else ' end,Field ordinal = A.colorder,Field name = A.name,Identification = case when ColumnProperty (A.id,a.name, ' isidentity ') =1 then ' √ ' Else ' end,Primary KEY = case when exists (SELECT 1 from sysobjects where xtype= ' PK ' and Parent_obj=a.id and name in (Select name from sysindexes WHERE indid in (SELECT indid from Sysindexkeys where id = a.id and colid=a.colid)) Then ' √ ' E LSE ' END,Type =

Shenzhen team to develop a system in the North China side to push customers, in a patch, due to changes in the data dictionary, but the Shenzhen team did not give the database update script, only to the new version of the database creation script, in order to ensure that the client system has no loss of data, Can only find a way to do it: using PowerDesigner to reverse the new version of the database, apply this model to the existing database, the PowerDesigner will compare two versions of the d

Tags: column int where for main color CTS SQL refDirectly on the code: 1 SELECTOsub.name as [child table name] , 2Fk.name as [FOREIGN Key Name] , 3Subcol.name as [child table column name] , 4Omain.name as [Primary Table name] , 5Maincol.name as [primary table column name] 6 fromSys.foreign_keys FK7 JOINSys.all_objects osub on(fk.parent_object_id=Osub.object_id ) 8 JOINSys.all_objects Omain on(fk.referenced_object_id=Omain.object_id )

--Query the paid vendor amount (paid-retired) based on the large order number ALTER FUNCTION [dbo].[ F__supplierpayoffamountborder] ( --Add The parameters for the function here @BOrderId int br>) RETURNS decimal as BEGIN declare @payOffAmount decimal set @payOffAmount =0 declare @SorderIdTemp table (id int)--Define temporary table insert into @SorderIdTemp (ID) select id from Tongye. borders_orders_s where [emailprotected] and isvalid=1 and orderstatus While exists (select I

allowed per column.3, check the constraintsThe check constraint sets the check condition for values in the input column or the entire table, and can limit the input values to ensure the integrity of the database. The check constraint determines the valid value through the logical expression of the data. For example, to define an age ages field, you can limit the range of values inside the age field to between 0 and 150 by creating a check constraint (>=0 and age Only one check constrai

--insert into pppcopy SELECT * FROM PPP//Get data from table PPP and insert it into pppcopy, copy only table data, do not copy table structure (prerequisite: Table pppcopy1 exists)--select * into PPPCOPY1 from PPP//copy data from PPP to PPPCOPY1, copy table data and table structure (provided that table pppcopy1 does not exist)--select * into PppCopy2 from PPP where 1=0//copies the table structure of PPP to PPPCOPY2, without copying data (provided that table pppcopy1 does not exist)--create table

Event Selection page, tick show all events, then select "Deadlock Graph" event, "Lock: Deadlock" and "Lock: Dead Chain" (Deadlock Graph,lock:deadlock;lock:deadlock Chain) as shown:, and then the other default event options (Deadlock graph,lock:deadlock;lock:deadlock Chain events) are canceled and run.4. Tracking for a period of time, the execution of the transaction aborted the end, select deadlock graph, we can visually see the cause of the deadlock between transactions:The ellipse has a fork

Use SQL statements to create school databases (including parameters), tblclass tables, and tblstudent tables. And fill in the data. Create a school database (including parameters)Create Database SchoolOn Primary(Name = 'school ',Filename = 'f: \ SQL Server \ school. MDF ',S

First, table variablesTable variables were first introduced in SQL Server 2000. The specific definitions of table variables include column definitions, column names, data types, and constraints. Constraints that can be used in table variables include primary KEY constraints, UNIQUE constraints, NULL constraints, and CHECK constraints (foreign KEY constraints cannot be used in table variables). A statement t

represents the number of rows affected. Example: DECLARE @News Table   (   News_id int NOT NULL,   NewsTitle varchar(100),   NewsContent varchar(2000),   NewsDateTime datetime   ) The difference between the above three methods: The difference between a temporary table and a table variable: 1) The table variable is stored in memory, when the user accesses the table variable,

following T-SQL statement to determine the maximum number of user connections allowed by your system:Select @ max_connectionsOnline User options are advanced options that can be set in Enterprise Manager. Click the online tab in the server Properties window, and enter a value in the user's online maximum value box, as shown in Figure 30-3. 　Figure 30-3 Set User linksEnable object options　The open objects o

DAC. If the DAC connection is active, any new requests that are connected through the DAC will be rejected with error 17810. (2) The DAC initially attempted to connect to the default database associated with the login account. Once the connection is successful, you can connect to the master database. If the default database is offline or unavailable, the connection returns error 4060. However, if you overwrite the default database with the following command and connect to the master database in

1. Two forms of temporary tables. In SQL Server databases, temporary tables are classified into global temporary tables and local temporary tables. These two types of tables are very di

SQL Getting Started Tutorial: SQL creation table create tables and database [create DATABSE] In the declaration of creating a databaseThe CREATE DATABASE statement is used to set up a data base. SQL syntax for creating a database CREATE DATABASE database_nameExample of creating a database now, we are going to build

pane of the evaluation execution. The Join Operation accesses several data tables and combines the searched data after access. (Link is discussed in Chapter 14th ). Enter the following Join Operation example in query Analyzer:Select orderid, customerid, employees. employeeid, firstname,Lastname, orderdateFrom orders join employees on orders. employeeid = employees.EmployeeidThe previous statement includes the SQL