
先有數(shù)據(jù)庫司草,再有表艰垂,再有數(shù)據(jù)。 所有語句后必須以分號結(jié)尾show databases;---查數(shù)據(jù)庫create database 數(shù)據(jù)庫名;---創(chuàng)建數(shù)據(jù)庫drop da...
人文素養(yǎng)是通過優(yōu)秀的人文文化實現(xiàn)的埋虹,而優(yōu)秀的人文文化則是在歷史的長河中通過不斷的積累猜憎,提煉和升華逐漸形成的,并隨著人類社會的發(fā)展而發(fā)展的搔课。學(xué)習(xí)優(yōu)秀的文化可以武裝我們的大腦胰柑,...
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一. XML 1作用 描述帶關(guān)系的數(shù)據(jù)(軟件的配置文件) 數(shù)據(jù)的載體(小型的“數(shù)據(jù)庫”) 2.語法 xml文件以xml后綴名結(jié)尾黔攒。 xml文件需要使用xml解析器...