说明:由系统提供,属于服务器层面。如果是全局级别,则需要加 global,如果是会话级别,则需加 session,如果不写,则默认 session。全局变量不能跨重启。会话变量仅仅针对当前变量有效 ●查看所有的系统变量 show global | 【session】 variables; ●查看满足条件的部分系统变量 show global | 【session】
using System; using System.Data.SqlTypes; using Microsoft.SqlServer.Server; public partial class StoredProcedures { [SqlProcedure] public static void ExampleCLRProcedure() { SqlContext.Pipe.Send("State Variable Value"); } } 6. 使用Session Context ...
ENCRYPTION (ALGORITHM, SERVER CERTIFICATE | ASYMMETRIC KEY):仅适用于 SQL Server 2014 或更高版本,指定要使用的加密算法以及要用于保护加密的证书或非对称密钥。 DESCRIPTION={'text'|@text_variable}:指定说明备份集的自由格式文本。 该字符串最长可达 255 个字符。 NAME = { backup_set_name| backupsetvar }...
新:dbo.soSessionC 將程式代碼中的CREATE TABLE #tempSessionC語句替換為DELETE FROM dbo.soSessionC,以確保當前會話的數據表內容不會被使用相同 "session_id" 的上一個會話公開。 請務必在部署時間建立記憶體優化數據表,而不是在運行時間建立記憶體優化數據表,以避免數據表建立...
In SQL Server, there are three scopes at which trace flags can work: query, session, and global. Query trace flags are active for the context of a specific query. Session trace flags are active for a connection and are visible only to that connection. Global trace flags are set at the ...
raiserror 的作用: raiserror 是用于抛出一个错误。[ 以下资料来源于sql server 2005的帮助 ] 其语法如下: RAISERROR ( { msg_id | msg_str | @local_variable } { ,severity ,state } [ ,argument [ ,...n ] ] ) [ WITH option [ ,...n ] ] ...
Program Name 使用会话的对应程序名。在连接字符串里可以设置程序名。如果会话是SQL Server代理的一部分,则显示作业名。 DatabaseName 会话的当前数据库名。 session_id 会话ID。 blocking_session_id 阻塞语句的会话ID。 wait_duration_ms 等待时间,单位为毫秒。这个时间不包括信号等待时间(signal wait time)。
During a peak in application requests/session, we noticed a significant increase in SOS_SCHEDULER_YIELD waits, with an unusual distribution of CPU load: only 2 NUMA nodes were heavily saturated, while the others remained underutilized. Our main questions are: At what point does SQL Server ...
The Query Optimizer uses UNKNOWN for the rest of the variable values. The values are used only during query optimization, and not during query execution. PARAMETERIZATION { SIMPLE | FORCED } Specifies the parameterization rules that the SQL Server Query Optimizer applies to the query when it ...
The first session is using one key while another session is using 10 keys. Conclusion In this article, we explored the session context function SESSION_CONTEXT() to manage the session variable in SQL Server. It is an enhancement over CONTEXT_INFO() and available from SQL Server 2016 onwards...