Trigger中,UPDATED(column)判断一个字段是否更新,而COLUMNS_updated可以判断多个字段,如下(ZT和SQL SERVER联机丛书) 1)仅用于insert,update触发器中. 2)指定的所有列是否都进行了更新,使用等号(=). 3)指定的任一列或某些列是否进行了更新,使用大于号(>) 例子: 有一表T,其包含五列:C1,C2,C3,C4,C5(注意:由...
TRIGGER_NESTLEVEL 这个是用在防止触发器嵌套触发,例如触发器里面执行数据插入\更新 再触发当前触发器,从而导致进入循环,所以要如果当前触发内会对表再执行更新\插入,需要添加对TRIGGER_NESTLEVEL的检查,防止触发器嵌套层数太多。 IF( (SELECTTRIGGER_NESTLEVEL(OBJECT_ID('xyz') ,'AFTER','DML') )>5)RAISERROR('...
If the object being updated appears more than one time in the FROM clause, one, and only one, reference to the object must not specify a table alias. All other references to the object in the FROM clause must include an object alias. A view with an INSTEAD OF UPDATE trigger can't be...
SQL Server Azure SQL Database Azure SQL Managed Instance This function returns avarbinarybit pattern indicating the inserted or updated columns of a table or view. UseCOLUMNS_UPDATEDanywhere inside the body of a Transact-SQLINSERTorUPDATEtrigger to test whether the trigger should execute certain acti...
\"", 1, tostring(triggersJson)) | where notnull(path) and path startswith "/datasets/default/" | extend triggerConnectionName=extract("\"connection\":{\"name\":\"(.*?)\"}", 1, tostring(triggersJson)) | where notnull(triggerConnectionName) | parse triggerConnectionName with "@...
Complex expressions can reference multiple columns, yet the inserted and deleted tables have only one value for each inserted row. The same issues apply to simple expressions in a view if they reference a computed column that has a complex expression. An INSTEAD OF trigger on the view must ...
适用于 SQL Server 的 Microsoft OLE DB 驱动程序 (MSOLEDBSQL) 对于链接服务器使用 SQLOLEDB 19 锁定 sp_lock sys.dm_tran_locks sp_lock 99 元数据 FILE_IDINDEXKEY_PROPERTY FILE_IDEXsys.index_columns(系统索引列) FILE_IDINDEXKEY_PROPERTY 15十七 本机XML Web 服务 带有FOR SOAP 选项的 CREATE ENDPOI...
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.
If the table has n columns, the ordinality of the new column is n+1. The value of n cannot be greater than 749. For a dependent table, n cannot be greater than 748. The column cannot be added if the increase in the total byte count of the columns exceeds the maximum row size. ...
SQL Server has always supported triggers, a special class of stored procedures defined to execute automatically when an update, insert, or delete statement is issued against a table. This ability has been extended with the inclusion of an INSTEAD OF...