'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. "EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have the same exposed names. Use correlation names to distingui...
Use the @@ROWCOUNT function to return the number of inserted rows to the client application. For more information, see @@ROWCOUNT (Transact-SQL).Variable names can be used in UPDATE statements to show the old and new values affected, but this should be used only when the UPDATE statement ...
Use the @@ROWCOUNT function to return the number of inserted rows to the client application. For more information, see @@ROWCOUNT (Transact-SQL).Variable names can be used in UPDATE statements to show the old and new values affected, but this should be used only when the UPDATE statement ...
If an error occurred in retrieving the number of modified rows, false is returned.ExampleThe following example displays the number of rows modified by an UPDATE statement. The example assumes that SQL Server and the AdventureWorks database are installed on the local computer. All output is ...
When the READ_COMMITTED_SNAPSHOT database option is set OFF, which is the default setting in SQL Server and Azure SQL Managed Instance, READ COMMITTED isolation uses shared locks to prevent other transactions from modifying rows while the current transaction is running a read operation. ...
If update 1 is applied first, there is no problem; if update 2 is applied first it will return '0 rows affected' because update 1 has not yet occurred. This situation is handled in the default procedures by raising an error if no rows are affected on an update: Copy if @@rowcount ...
当set nocount 为 on 时,将不给客户端发送存储过程中的每个语句的 done_in_proc 信息。当使用 microsoft® sql server™ 提供的实用工具执行查询时,在 transact-sql 语句(如 select、insert、update 和 delete)结束时将不会在查询结果中显示"nn rows affected"。
在SQL Server、Azure SQL 数据库和 Analytics Platform System (PDW) 中创建 Transact-SQL 或公共语言运行时 (CLR) 存储过程。 存储过程与其他编程语言中的过程类似,这是因为存储过程可以:接受输入参数并以输出参数的格式向调用过程或批处理返回多个值。 包含用于在数据库中执行操作(包括调用其他过程)的编程语句。
HoBT and TABLE locks can be affected by the LOCK_ESCALATION option of ALTER TABLE. Lock Modes The SQL Server Database Engine locks resources using different lock modes that determine how the resources can be accessed by concurrent transactions. The following table shows the resource lock modes tha...
... Isolation level repeatable read (14 row(s) affected) DBCC execution completed. If DBCC printed error messages, contact your system administrator. 锁提示可以在 SELECT、INSERT、UPDATE、DELETE 和MERGE 语句中为单个表引用指定锁提示。 提示指定数据库引擎实例用于表数据的锁类型或行版本控制。 当需要对...