You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?（） ["BFILE ","REF column ","Object table ","Column object ","INSTEAD-OF trigger"]
人民法院审理涉及家庭暴力的案件，可以根据公安机关（）等证据，认定家庭暴力事实。 ["出警记录","告诫书","伤情鉴定意见"]
Examine the following query output: You issue the following command to import tables into the hr schema: $ > impdp hr/hr directory = dumpdir dumpfile = hr_new.dmp schemas=hr TRANSFORM=DISABLE_ARCHIVE_LOGGING: Y Which statement is true?（） [" All database operations performed by the impdp command are logged."," Only CREATE INDEX and CREATE TABLE statements generated by the import are logged."," Only CREATE TABLE and ALTER TABLE statements generated by the import are logged."," None of the operations against the master table used by Oracle Data Pump to coordinate its activities are logged."]
You work as a database administrator at Certkiller .com. You are working in an online transaction processing （OLTP） environment. You realize that the salary for an employee， John， has been accidentally modified in the EMPLOYEEStable. Two days ago， the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected？（） [" perform point-in-time recovery"," perform a Flashback Table operation to restore the table to the state it was in two days ago"," perform a Flashback Database operation to restore the database to the state it was in two days ago"," perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery"]
人的心理是（） ["A.脑的功能 ","B.客观现实的反映 ","C.主观映象 ","D.由心脏产生的"]
ListBox、ComboBox和RadioGroup 三个组件都有一个Items属性，请说出该属性对三个组件的用途各是什么？
