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
处理单个 Transact-SQL 语句是 SQL Server 执行 Transact-SQL 语句的最基本方法。 用于处理只引用本地基表(不引用视图或远程表)的单个 SELECT 语句的步骤说明了这个基本过程。逻辑运算符的优先顺序当一个语句中使用了多个逻辑运算符时,计算顺序依次为:NOT、AND最后是 OR。 算术运算符和位运算符优先于逻辑运算符...
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_num...
SELECTcolumn1, column2, ...CASEWHENcondition1THENresult1WHENcondition2THENresult2-- Add more WHEN conditions and results as neededENDASalias_nameFROMtable_name; We can add as manyWHEN ... THENconditions as required in theCASEstatement. For example, -- multiple CASE conditions in SQLSELECTcusto...
, head.wait_type, head.wait_time, head.wait_resource, head.statement_start_offset, head.statement_end_offset , head.plan_handle, head.sql_handle, head.most_recent_sql_handle,0AS[Level]FROMcteHeadASheadWHERE(head.blocking_session_idISNULLORhead.blocking_session_id =0)ANDhead.session_idIN(...
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...
Specifies that the function has one or more of the following options. ENCRYPTION Applies to: SQL Server 2008 (10.0.x) SP 1 and later versions. Indicates that the Database Engine converts the original text of the CREATE FUNCTION statement to an obfuscated format. The output of the obfuscation...
如果短时间内不停连接,就会被SQL SERVER误认为是这是攻击,会将此账号锁定。 要用windows身份验证登录,在查询分析器里输入: ALTER LOGIN sa ENABLE ; GO ALTER LOGIN sa WITH PASSWORD = 'password' unlock, check_policy = off, check_expiration = off ; ...
org.apache.hive.service.cli.HiveSQLException: Invalid or unknown query handle SQLException: Cancelled 具体报错信息如下: java.sql.SQLException:Cancelledatorg.apache.hive.jdbc.HiveStatement.waitForOperationToComplete(HiveStatement.java:381)atorg.apache.hive.jdbc.HiveStatement.execute(HiveStatement.java:260)at...
CREATE EVENT SESSION [event_session_test3] ON SERVER -- Or, if on Azure SQL Database, ON DATABASE. ADD EVENT sqlserver.lock_deadlock ( SET collect_database_name = (1) ACTION ( package0 .collect_system_time, package0 .event_sequence, sqlserver .client_hostname ) WHERE ( [database_na...