Inserted表有数据(新数据),Deleted表有数据(旧数据)[ INSTEAD OF 触发器用来代替通常的触发动作,即当对表进行INSERT、UPDATE 或 DELETE 操作时,系统不是直接对表执行这些操作,而是把操作内容交给触发器,让触发器检查所进行的操作是否正确。如正确才进行相应的操作。因此,INSTEAD OF 触发器的动作要早于表的约束处理。
大家都知道SQL Server触发器分为DDL、DML和登录触发器。其中DML触发器对于一个表来说,又可分为Insert、Update、Delete三种触发器。也许触发器的功能作用大家都清楚了,可是大家知道当批量Update或者批量Delete数据的时候,触发器如何工作吗?在这种情况下,触发器不是逐条触发的(也就是说不是删除一条记录的同时,触发器开...
Create Table TB_2(ID Int, Name_1 varchar(20),Status varchar(20) ,Type Varchar(20)) -- 为Tb_1创建Trigger, 当 TB_1 发生变化时,变化的信息(Insert ,Update,Delete)将保存于 TB_2 中,Update是两条记录,Update 之前和之后 都要保存盐类 Create trigger Trig_t2 On Tb_1 For Insert,Update,Delete...
(7) 可以在下方窗口中看到4条系统信息,表示:第1条INSERT语句因成绩为190超出范围,而要求重新输入;第2条INSERT语句因成绩为100在正常范围内,而插入表中;第3条UPDATE语句因成绩为130超出范围,而要求重新输入;第4条UPDATE语句因成绩为60在正常范围内,修改成功;查看数据库表SC的数据。在数据库表SC数据窗口中,单击感...
For SQL Server, you must be the owner of the database (dbo), or a member of thesysadminfixed server role. For Azure SQL Database, you must be a member of thedb_ownerfixed database role. Examples The following example updates the statistics for all tables the database: ...
This might not meet business rules, such as firing an UPDATE trigger. With Trace Flag 8207, an update to a unique column that affects only one row (a singleton update) is replicated as an UPDATE and not as a DELETE or INSERT pair. If the update affects a column on which a unique ...
(1) 点击屏幕上方 “工具栏”菜单中的“新建查询”按钮,打开“查询编辑器”窗口,并在“查询编辑器”窗口中输入以下T-SQL语句: USEjxskGOCREATETRIGGERSCORE_SC_TRIONSCFORINSERT,UPDATEASDECLARE@SCORE_READTINYINTSELECT@SCORE_READ=SCOREFROMinsertedIF@SCORE_READ>=0AND@...
This might not meet business rules, such as firing an UPDATE trigger. With Trace Flag 8207, an update to a unique column that affects only one row (a singleton update) is replicated as an UPDATE and not as a DELETE or INSERT pair. If the update affects a column on which a unique ...
FL 500The CREATE TRIGGER (advanced) statement defines an advanced trigger in a schema and builds a trigger package at the current server. Each time that the trigger activates, the trigger package executes one or more times. FL 500For a description of the differences between basic and advanced ...
ISqlResourcesOperations.BeginCreateUpdateSqlTriggerWithHttpMessagesAsync Método Referência Comentários Definição Namespace: Microsoft.Azure.Management.CosmosDB.Fluent Assembly: Microsoft.Azure.Management.CosmosDB.Fluent.dll Pacote: Microsoft.Azure.Management.CosmosDB...