begintranbegin tryinsertintoStudent(Name)values('try catch')insertintoStudent(Name)values('try catch')insertintoStudent(Name)values(null)end trybegin catchif@@TRANCOUNT>0rollbacktranend catchif@@TRANCOUNT>0committran--在SqlServer里,嵌套事务的层次是由@@TranCount全局变量反映出来的。--每一次Begin Tra...
题目:Try to predict the output of this code... declare @i int, @j int set @i = 1 create table #temp (id int) while (@i<=5) begin begin try begin transaction if (@i = 3) set @j = @i/0 insert into #temp values (@i) commit transaction end try begin catch rollback transa...
BEGINTRANSACTION;BEGINTRY-- Generate a constraint violation error.DELETEFROMProduction.ProductWHEREProductID =980;ENDTRYBEGINCATCHSELECTERROR_NUMBER()ASErrorNumber, ERROR_SEVERITY()ASErrorSeverity, ERROR_STATE()ASErrorState, ERROR_PROCEDURE()ASErrorProcedure, ERROR_LINE()ASErrorLine, ERROR_MESSAGE()ASEr...
BEGINTRANSACTION;BEGINTRY-- Generate a constraint violation error.DELETEFROMProduction.ProductWHEREProductID =980;ENDTRYBEGINCATCHSELECTERROR_NUMBER()ASErrorNumber, ERROR_SEVERITY()ASErrorSeverity, ERROR_STATE()ASErrorState, ERROR_PROCEDURE()ASErrorProcedure, ERROR_LINE()ASErrorLine, ERROR_MESSAGE()ASEr...
J. 使用 TRY...CATCH 下列範例使用 TRY...CATCH 建構傳回預存程序執行期間所攔截到的錯誤資訊。 SQL 複製 CREATE PROCEDURE Production.uspDeleteWorkOrder ( @WorkOrderID INT ) AS SET NOCOUNT ON; BEGIN TRY BEGIN TRANSACTION -- Delete rows from the child table, WorkOrderRouting, for the specified wo...
BEGIN命令,或者BEGIN WORK或BEGIN TRANSACTION命令启动事务块。 在给出显式的COMMIT或ROLLBACK命令之前,在开始命令之后输入的任何语句都将在单个事务中执行。 此命令与START TRANSACTION相同。 BEGIN BEGIN WORK BEGIN TRANSACTION Copy Toggle Text Wrapping 关闭 CLOSE命令释放与打开游标关联的资源。 游标关闭后,不允许...
通过使用 BEGIN/COMMIT TRANSACTION 使用显式事务,使事务尽可能短。 更长的事务意味着更长的记录锁定和更高的死锁风险。 使用Transact-SQL TRY…CATCH 功能进行过程内的错误处理。 TRY…CATCH 可以括入整个 Transact-SQL 语句块。 这不仅产生更少的性能开销,还通过显著减少的编程,使错误报告更精确。 对过程主体中的...
The statement inside the TRY block generates a constraint violation error. sql Copy BEGIN TRANSACTION; BEGIN TRY -- Generate a constraint violation error. DELETE FROM Production.Product WHERE ProductID = 980; END TRY BEGIN CATCH SELECT ERROR_NUMBER() AS ErrorNumber, ERROR_SEVERITY() AS Error...
public string Insert(BsOrder order, List<BsOrderDetail> detailList) { var session = LiteSqlFactory.GetSession(); try { session.BeginTransaction(); order.Id = Guid.NewGuid().ToString("N"); order.CreateTime = DateTime.Now; decimal amount = 0; foreach (BsOrderDetail detail in detailList)...
using server- or client-side TRY…CATCH error handling for deadlocks, to avoid UnhandledException errors in the application. The Lock Monitor When the Lock Monitor performs a deadlock search and detects that one or more sessions are embraced in a deadlock, one of the sessions is selected as ...