This SQL Server tutorial explains how to use the SQL Server (Transact-SQL) CASE statement with syntax and examples. In SQL Server (Transact-SQL), the CASE statement has the functionality of an IF-THEN-ELSE statement. You can use the CASE statement within
SQL Server 視為可摺疊的內建函數,包括 CAST 和CONVERT。 如果內建函數只包含其輸入,並且不含其他內容資訊 (例如 SET 選項、語言設定、資料庫選項和加密金鑰) 時,此內建函數通常是可摺疊。 非決定性函數不可摺疊。 決定性內建函數可摺疊,但有一些例外。 自SQL Server 2012 (11.x) 起,CLR 使用者定義類型的...
运行以下查询以确定活动的 XEvent 或 Server 跟踪: SQL PRINT '--Profiler trace summary--'SELECTtraceid, property,CONVERT(VARCHAR(1024),value)ASvalueFROM::fn_trace_getinfo(default)GOPRINT'--Trace event details--'SELECTtrace_id,status,CASEWHENrow_number =1THENpathELSENULLendASpath,CASEWHENrow_nu...
wait_resource, statement_start_offset, statement_end_offset, plan_handle, sql_handle, most_recent_sql_handle, [Level])AS(SELECThead.session_idAShead_blocker_session_id, head.session_idASsession_id, head.blocking_session_id , head.wait_type, head.wait_time, head.wait_resource, head.statement_...
last_execution_timeAS[最后一次执行时间],max_worker_time/1000AS[最大执行时间(ms)],SUBSTRING(qt.text,qs.statement_start_offset/2+1, (CASEWHENqs.statement_end_offset=-1THENDATALENGTH(qt.text)ELSEqs.statement_end_offsetEND-qs.statement_start_offset)/2+1)AS[使用CPU的语法], qt.text[完整语法]...
SET IDENTITY_INSERT [dbo].[Employee] OFF GO We have following records in Employee table. Different Formats of CASE Statements A simple CASE statement expression In this format, we evaluate one expression against multiple values. In a simple case statement, it evaluates conditions one by one....
head.statement_end_offset , head.plan_handle, head.sql_handle, head.most_recent_sql_handle, 0 AS [Level] FROM cteHead AS head WHERE (head.blocking_session_id IS NULL OR head.blocking_session_id = 0) AND head.session_id IN (SELECT DISTINCT blocking_session_id FROM cteHead WHERE blockin...
第一步, SSMS-工具-SQL Server Profiler-连接数据库-文件-新建跟踪-运行; 第二步, 筛选某一操作: 跟踪窗体-右键属性-事件选择-列筛选器-找到"TextData"-类似于"%select%". --也可以筛选insert\update等操作 想筛选应用程序可以在列筛选器中选择"Application Name"输入程序名和通配符进行过滤. ...
column1,column2,...are the column names to be included in the result set CASEchecks thecondition resultis the result or value to be inserted to the new column ifconditionis satisfied ENDends theCASEstatement ASspecifies the namealias_namefor the new column ...
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