2、流程控制 2.1 CASE语句 类似的,SQL支持case条件语句,两种格式如下: 1. 1)指定 case_value 匹配 case_value是一个表达式,这个值与when_value相比较,如果相等,则进入相应的statement_list,statement_list就是一个语句列表,可以包含多条语句。如果在when_value中没有和case_value相等的值,则进入ELSE里面的statemen...
SQL Server有30多个全局系统变量,但有几个是常用到的,如下SQL语句 + View Code SQL语句里的脚本 脚本提供了变量、分支、循环等控制语句,可以用来实现一些复杂的任务,SQL语句里的流程控制语句包括: IF…ELSE GOTO WHILE WAITFOR TRY/CATCH CASE 1、我们先来看一下IF...ELSE语句,语法的格式如下: IF<Boolean Exp...
ORDER BY [cpu_time] DESC 4、查询CPU占用最高的SQL语句 SELECT TOP 10 total_worker_time/execution_count AS avg_cpu_cost, plan_handle, execution_count, (SELECT SUBSTRING(text, statement_start_offset/2 + 1, (CASE WHEN statement_end_offset = -1 THEN LEN(CONVERT(nvarchar(max), text)) * 2...
public class SQLServerStatement 备注 SQLServerStatement 类还提供了大量基类实现方法,以用于 JDBC 准备就绪语句和可调用语句。 SQLServerStatement 类的基本作用是先运行 SQL 语句,再向用户应用程序返回更新计数和结果集。 此类支持取消包装 SQLServerStatement 类、ISQLServerStatement 接口和 java.sql.Statement 接口。 有...
For more information, see MSSQLSERVER_4064. The database explicitly specified in the connection string or in SSMS is incorrectly spelled, offline, or otherwise not available. - Fix the database name in the connection string. Pay attention to case sensitivity if using a case sensitive collation ...
For more information, see MSSQLSERVER_4064. The database explicitly specified in the connection string or in SSMS is incorrectly spelled, offline, or otherwise not available. - Fix the database name in the connection string. Pay attention to case sensitivity if using a case sensitive collation ...
For more information, see MSSQLSERVER_4064. The database explicitly specified in the connection string or in SSMS is incorrectly spelled, offline, or otherwise not available. - Fix the database name in the connection string. Pay attention to case sensitivity if using a case sensitive collation...
+ CASE WHEN details.equality_columns IS NOT NULL AND details.inequality_columns IS NOT NULL THEN '_' ELSE '' END + REPLACE(REPLACE(REPLACE(ISNULL(details.inequality_columns,''),', ','_'),'[',''),']','') + ']' + ' ON ' + details.statement ...
The database explicitly specified in the connection string or in SSMS is incorrectly spelled, offline, or otherwise not available.- Fix the database name in the connection string. Pay attention to case sensitivity if using a case sensitive collation on the server. ...
( CASE WHEN er.statement_end_offset = -1 THEN LEN (CONVERT (NVARCHAR (MAX), qt.text)) * 2 ELSE er.statement_end_offset END - er.statement_start_offset) / 2), qt.text,program_name,Hostname,nt_domain,start_time FROM sys.dm_exec_requests er ...