题目答案
C
您的答案
答案解析
在关系模型数据库中,基本结构是二维表,这种二维表称为关系。关系的列称为属性,一个具有N个属性的关系称为N元关系。
C
Fatal error: Uncaught Error: Call to a member function query() on null in F:\duqu8.com\SaxueFrame\common\funarticle.php:16
Stack trace:
#0 F:\duqu8.com\SaxueFrame\common\funarticle.php(51): formatContent('<p>\xE8\x8B\xA5\xE6\x9C\x89\xE4\xBB\xA5\xE4\xB8\x8B...', Object(blockquestionlist))
#1 F:\duqu8.com\SaxueFrame\blocks\block_questionlist.php(107): formatQuestion(Array, Object(blockquestionlist))
#2 F:\duqu8.com\SaxueFrame\lib\template\template.php(640): blockquestionlist->setcontent(true)
#3 F:\duqu8.com\SaxueFrame\data\compiled\templates\pc\question.detail.html.php(350): saxue_get_eloop(Array)
#4 F:\duqu8.com\SaxueFrame\lib\template\template.php(329): include('F:\\duqu8.com\\Sa...')
#5 F:\duqu8.com\SaxueWeb\detail.php(81): saxuetpl->fetch('F:/duqu8.com/Sa...')
#6 {main}
thrown in
F:\duqu8.com\SaxueFrame\common\funarticle.php on line
16