目录1.引言2.NOT NULL——制定某列不可以存储NULL值2.UNIQUE——保证某一列的每一行必须有唯一的数值3. DEFAULT——规定没有给列赋值时的默认值4.PRIMARY KEY ——NOT NULL
I am interested in studying some test logs from different projects, in order to build and test an application for school. I need to analyze the parts of the code which are tested, the bugs which appea