Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE You issue these statements: CREATE table new_emp ( employee_id NUMBER, name VARCHAR2(30)); INSERT INTO new_emp SELECT employee_id , last_name from employees; Savepoint s1; UPDATE new_emp set name = UPPER(name); Savepoint s2; Delete from new_emp; Rollback to s2; Delete from new_emp where employee_id =180; UPDATE new_emp set name = 'James'; Rollback to s2; UPDATE new_emp set name = 'James' WHERE employee_id =180; Rollback; At the end of this transaction, what is true?() You have no rows in the table.。 You have an employee with the name of James.。 You cannot roll back to the same savepoint more than once.。 Your last update fails to update any rows because employee ID 180 was already deleted.。
在液相液化石油气输送过程中,要求管道中任何一点的压力都要()管道中液化石油气所处温度下的饱和蒸汽压。 小于或等于;。 高于;。 等于;。 低于。
男性,45岁,施工中因房屋倒塌,被埋在泥土中,伤肢严重肿胀,组织广泛缺血与坏死。对患者的急救包括() 尽快使患者脱离危险。 首先处理危及生命的损伤。 及时处理活动性出血。 骨折患者及时复位。 休克患者不作处理,立即送医院急救。
产品未必具备人们所期望的性能而存在的风险是() 功能风险。 安全风险。 经济风险。 社会风险。
Given: Which two statements are true?() The output could be 8-1 7-2 8-2 7-1。 The output could be 7-1 7-2 8-1 6-1。 The output could be 8-1 7-1 7-2 8-2。 The output could be 8-1 8-2 7-1 7-2。
地网接地体埋设在农田等经常开挖施工的地面下时,应深埋()m以下,并在适当位置作明显的标识。