百度试题 题目【单选题】SQL Server中删除触发器用() A. ROLLBACK B. DELALLOCATE C. DELETE D. DROP相关知识点: 试题来源: 解析 DROP 反馈 收藏
Adding leading zeroes (PADDING in SQL Server) adding new column in my linked server Adding NOT NULL DEFAULT VALUE column to existing table with data Adding of counter column Adding varchar(8) in time format that totals more than 24 hrs in SQL Additional Column With BULK INSERT Adventureworks q...
Manual backups can be manually deleted from the backup list in the TencentDB for SQL Server console. If they are not manually deleted, they will be retained for the same period as automatic backups. Can I disable data and log backups? No. However, you can lower the backup frequency and...
The ROLLBACK statement is used to back out of the database changes that were made within a unit of work or a savepoint. Invocation This statement can be embedded in an application program or issued through the use of dynamic SQL statements. It is an executable statement that can be ...
When ROLLBACK is used without the TO SAVEPOINT clause, the unit of work in which it is executed is ended. All changes made by SQL schema statements and SQL data change statements during the unit of work are backed out. For more information seeStatements. ...
{"__typename":"User","id":"user:-1","uid":-1,"login":"Deleted","email":"","avatar":null,"rank":null,"kudosWeight":1,"registrationData":{"__typename":"RegistrationData","status":"ANONYMOUS","registrationTime":null,"confirmEmailStatus":false,"registrationAccessLevel":"VIEW","sso...
$deleted1 =$this->conn->executeUpdate($exch->getSql()); $exch = DriverTestManager::getExchange('ConnectionTest.setAutoCommit.DELTRAN2'); $deleted2 =$this->conn->executeUpdate($exch->getSql());$this->conn->rollback();// compare the actual total w/ what we expect$rs =$this->conn-...
those tables are an exact mirror of the table the trigger is on: same column names, everything; they are a virtual extention for the trigger.(so teh columns in INSERTED/DELETED change for each table) you can check if any data exists at all in a table by SELECT * FROM or select a ...
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Database changed mysql> select * from innodb_locks; Empty set, 1 warning (0.01 sec) mysql> 1. 2. 3. 4. 5. 6. 7. 8. 9. (2)通过设置InnoDB Monitors观察锁冲突情况: mysql> create table innodb_monitor(a INT) ENGINE=INNODB;