OCP 071中文考试题库(cuug内部资料)第8题
OCP 071中文考试题库(cuug内部资料)第8题本套题库是OCP考试中的071(中文版)试题，由CUUG整理，如有报考OCP认证意向，可以联系cuug咨询老师。8、请选择最佳答案。查看INVOICES表中的数据:INVOICE_ID CURRENCY_CODE RAISED_DATE--------------------- --------------------------- ---------------------1 EUR 01-JAN-20192 USD 01-FEB-20193 JPY 01 -MAR-2019查看CURRENCIES表中的数据:CURRENCY_CODE---------------------------JPYGPBCADEURUSD哪个查询返回CURRENCIES中存在而INVOICES中不存在的货币?A) SELECT * FROM currenciesWHERE NOT EXISTS (SELECT NULL FROM invoices WHERE currency_code = currency_code);B) SELECT * FROM currenciesMINUSSELECT * FROM invoices;C) SELECT currency_code FROM currenciesMINUSSELECT currency_code FROM invoices;D) SELECT currency_code FROM currenciesINTERSECTSELECT currency_code FROM invoices;http://www.cuug.com.cn/uploadfile/2021-01/26780591026.jpg
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