使用 CHANGETABLE 获取特定行的版本号。 如果行已经更新,则不进行更改,并且查询将返回有关对行的最近更改的信息。 SQL 复制 -- @last_sync_version must be set to a valid value UPDATE SalesLT.Product SET ListPrice = @new_listprice FROM SalesLT.Product AS P WHERE ProductID = @...
使用 取得 CHANGETABLE特定數據列的版本號碼。 如果數據列已更新,則不會進行變更,而且查詢會傳回數據列最近變更的相關信息。 SQL 複製 -- @last_sync_version must be set to a valid value UPDATE SalesLT.Product SET ListPrice = @new_listprice FROM SalesLT.Product AS P WHERE ProductID = @product_...
You can change the order of columns inTable Designerin SQL Server Management Studio (SSMS). By default, a safety mechanism of SSMS blocks changing the column order. Though it isn't recommended, you can change the column order in a table by re-creating the table. ...
假设我们在字段k上建立索引,对于select * from table where k=1;这个SQL语句,普通索引和唯一索引的执行过程如下: 对于普通索引,当我们找到k=1的记录之后,首先需要通过索引上的id字段"回表"查询聚集索引上其他字段的内容,然后要接着向后寻找其他k=1的值,重复这个过程。因为普通索引可能有重复的现象发生。 对于唯一...
ValueDescription Auto_FixLinks a user entry in thesys.database_principalssystem catalog view in the current database to a SQL Server login of the same name. If a login with the same name doesn't exist, one is created. Examine the result from theAuto_Fixstatement, to con...
@property is sysname, and can be one of the values listed in the following table. [ @value = ] N'value' The new value for the specified property. @value is nvarchar(2000), and can be one of the values listed in the following table. This table describes the properties of articles ...
Add Column with the SQL ALTER TABLE STATEMENT The ALTER TABLE command supports adding columns to an existing table. Unless you specify a default value, the column should be defined as nullable. The T-SQL code below creates a new column namedWeightPoundsand uses an update statement to populate...
Transact-SQL Syntax Conventions Syntax CHANGETABLE ( { CHANGES table , last_sync_version | VERSION table , <primary_key_values> } ) [AS] table_alias [ ( column_alias [ ,...n ] ) <primary_key_values> ::= ( column_name [ , ...n ] ) , ( value [ , ...n ] ) ...
errorinMySQL that makes the server to die when trying to rename a tablewithFKs.See https://bugs.mysql.com/bug.php?id=96145Since pt-online-schema change needs to rename the old<->newtablesasthe final step,and the requested table has FKs,it cannot be executed under the current MySQL versi...
使用CHANGETABLE 函数运行一个查询,该查询返回有关表的更改跟踪信息。 在这种情况下,查询需要很长时间才能返回结果。 解决方案 累积更新信息 SQL Server 2008 Service Pack 1 此问题的修补程序首次发布于 SQL Server 2008 Service Pack 1 的累积更新10。有关此累积更新包的详细信息,请单击下面的文章编号,以查看 Mic...