單項選擇題

PowerBuilder9.0中連接數(shù)據(jù)庫的正確步驟是()

A.建立數(shù)據(jù)庫描述文件;用CONNECT命令連接數(shù)據(jù)庫
B.建立ODBC數(shù)據(jù)源;建立數(shù)據(jù)庫描述文件;用CONNECT命令連接數(shù)據(jù)庫
C.建立ODBC數(shù)據(jù)源;用CONNECT命令連接數(shù)據(jù)庫
D.建立ODBC數(shù)據(jù)源;建立數(shù)據(jù)庫對象;用CONNECT命令連接數(shù)據(jù)庫

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