Examine the description of the PRODUCT_STATUS table: Name Null? Type PROD_ID NOT NULL NUMBER(2) STATUS NOT NULL ...

Examine these SQL statements which execute successfully: CREATE TABLE emp (emp_no NUMBER(2) CONSTRAINT emp_emp_no_pk PRIMARY KEY, ename VARCHAR ...

You execute this command: TRUNCATE TABIE depts; Which two are true? A) A ROLLBACK statement can be used to retrieve the deleted data. B) It drops any triggers defined on the table. C) It retains the i ...

-------------------------------------------------------------------------------- Upgrade urgency levels: LOW: No need to upgrade unless there are new features you want to use. MODERATE: Program ...

3. 使用 正如前面提到的，在目前形式中，MySQL Router最好与应用程序一起使用。也就是说，应该在运行应用程序的相同机器上安装Router。虽然这不是强制要求，但建议采用这种做法。可以编写程序来监控mysqlrou ...

执行计划收集 DAO_OBJECTS t1 , DAO_OBJECTS t2 WHERE deptno= t1.object_id AND t1.object_name=t2.object_name ;+----+-------------+-------+------+---------------+------+---------+------+-------+----- ...

1. 正版Oracle 产品和盗版的区别 直奔主题，这是许多研发不注意的地方。对于商用（就是你不是在家里，自己玩），严格来说，就是一张许可证纸的区别。不管是什么时候，下载的版本都可以建立数据库并正常开发，但是如 ...

Examine this partial command: CREATE TABLE cust( cust_id NUMBER(2), credit_limit NUMBER(10) ORGANIZATION EXTERNAL Which two clauses are required for this command to execute successfully? A) the ACCESS ...