On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command: $> sqlldr hr/hr@pdb table=employees Which two statements are true regarding the command?（） It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.。 It fails because no SQL *Loader data file location is specified.。 It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.。 It fails because no SQL *Loader control file location is specified.。
论述往复式压缩机级间压力超过正常压力的原因及排除故障的方法。
Which statement is true regarding Flashback Version Query？ （） It returns versions of rows only within a transaction.。 It can be used in subqueries contained only in a SELECT statement.。 It will return an error if the undo retention time is less than the lower bound time or SCN specified.。 It retrieves all versions including the deleted as well as subsequently reinserted versions of the rows.。
老舍在英国期间连续发表了三个长篇：《老张的哲学》、《赵子曰》和《（）》。
You create a data block based on a relational table containing a REF column. You select the REF column for your form module. What is true about the items based on the REF column attributes?（） The Query Only property is set to Yes. 。 The Conceal Data property is set to Yes. 。 The Insert Allowed property is set to Yes. 。 The Update Allowed property is set to Yes.。
Which two code fragments will execute the method doStuff（） in a separate thread？（）
