ҵͨòѯ߰:
1.ѯԴ
  ÿѯжӦԴ
  :Ψһʶظ;ѯ:ѯ
  :Դ  a  a,b
  :ڶԴ a.f1 = b.f1 and a.f2 = b.f2
  ĿĿ:ϵͳ
  ֶ:ѯڲοڵֶ
  Ȩֶ:ѯڲοȨ޵ֶ pcode  a.pcode,b.pcodes
  ע:ʾòѯԴĻϢ֣#
2.ѯ
  ѯʽ:ϸ,
  ʽ:
    a.: ԲѯҲԴӡ
    b.ʾ: ֻڲѯܴӡ
    c.ӡ: ֻڴӡܲѯ
3.ѯֶ
4.ʾֶ
  ѡʾֶбҼɵ˵
    a.: ֶΣͨʽֶθֵڲѯ
    b.ɾ: ҲDEL
    c.: ˫ĿҲɵԶԻ
5.ֶ
  ڲѯʽΪʱķ
6.ֶ
  ڲѯ
7.
  @n n
  ^n n
  : ʹáпʹò
    һһʹãڵڡ
    : (@1 or Left(gcode.gcode,4) = '^1') and (@2 or levl = 1 )
  ֵ: ֵһЩǴ,"ǰ"""""""
8.
  ^n n
  :ڶԻĸ룬ȱʡڵ
    : ĬΪϵͳڣ-30ϵͳǰ30죬30ϵͳں30죬"""null"ʾ
    ıֵ: SQLѯ select bcode,bname,shortcode from bcode where bcode>' '
      ѯ䷵ֶ½бʽֶμ³Ի
  Ǵ: "б""ͻб""Ʒб""Ŀб""""ͻ""Ʒ""Ŀ"
9.ʽ
  ֶ X ܼ  :X=Ӧ-Ӧ
10.ӡʽ
