[計(jì)] 數(shù)據(jù)和結(jié)構(gòu)定義語(yǔ)言 structure definition language: 結(jié)構(gòu)化定義語(yǔ)言data definition language: 數(shù)據(jù)定義語(yǔ)言data definition language (ddl): 數(shù)據(jù)定義語(yǔ)言data dictionary definition language: 數(shù)據(jù)詞典定義語(yǔ)言ddl data definition language: 數(shù)據(jù)定義語(yǔ)言下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯