1.一般变量的写法:

if (str_kind is not null) then

    l_str_kind := str_kind;

    v_wheresql := v_wheresql || ' and kind = :kind ';

else

    l_str_kind := '';

    v_wheresql := v_wheresql || ' and 1 = :kind ';

end if; 

2.时间段的写法:

if (dt_itstarttime is not null) then

    v_wheresql := v_wheresql || ' and createtime >= (' || to_date(dt_itstarttime, 'yyyy-mm-dd hh24:mi:ss') || ' )';

end;

if (dt_itstarttime is not null) then

    v_wheresql := v_wheresql || ' and createtime <= (' || to_date(dt_itstarttime, 'yyyy-mm-dd hh24:mi:ss') || ' )';

end;

if (dt_valstarttime is not null) then

    v_wheresql := v_wheresql || ' and validtime >= (' || to_date(dt_valstarttime, 'yyyy-mm-dd hh24:mi:ss') || ' )';

end;

if (dt_valendtime is not null) then

    v_wheresql := v_wheresql || ' and validtime <= (' || to_date(dt_valendtime, 'yyyy-mm-dd hh24:mi:ss') || ' )';

end;

或:

  v_sql := v_sql || ' and trunc(a.creattime) >= to_date(:crestarttime,''yyyy-mm-dd'') ';

  v_sql := v_sql || ' and trunc(a.creattime) <= to_date(:creendtime,''yyyy-mm-dd'') ';

  v_sql := v_sql || ' and trunc(a.updatetime) >= to_date(:updstarttime,''yyyy-mm-dd'') ';

  v_sql := v_sql || ' and trunc(a.updatetime) <= to_date(:updendtime,''yyyy-mm-dd'') ';

3.时间的写法:

v_sql := v_sql || ' and logtime >= to_date(:logtime, '|| ' ''yyyy-mm-dd hh24:mi:ss'')';

4.or的写法:

if (str_object is not null) then

    l_str_object := str_object;

    v_sql := v_sql || ' and ( objectid = :objectid or objectname = :objectname )';

else

    l_str_object := 1;

    v_sql := v_sql || ' and ( 1 = :objectid  or 1 = :objectname ) ';

end if;

注意: 此时在using 中l_str_object要写两个

5.字符串的写法:('|| 字符串 ||')

举例:

--1.trim和rtrim

v_sql := v_sql || ' and status in (' || ltrim(rtrim(str_status, ','), ',') || ') ';

--2.字符串

v_sql := ' select netname from t_cms_netconf where netid = ' || str_netid || ' order by 1 ';

--3.in

v_sql := ' t.status in (' || rtrim(str_status, ',') || ')'

--4.instr

v_sql := v_sql || ' and instr(''|'' || b.typelist || ''|'', ''|'' || :typelist || ''|'') > 0';

6.数字的写法: ||数字

举例: v_sql := v_sql || ' and handletimes < ' || f_ums_config_in_qr('deploy/cms/task/maxsend', 5);

7.数组的写法:

sql中的写法:returning transactionid into :arr_tranactionid

using中的写法:returning bulk collect into v_arr_tranactionid   --v_arr_tranactionid定义的临时变量

8.like的用法及%和_的处理

--1.

    if (str_specialname is not null) then

        l_str_specialname := '%' || lower(str_specialname) || '%';

        v_sql := v_sql || ' and lower(a.specialname) like :specialname ';

    else

        l_str_specialname := '';

        v_sql := v_sql || ' and 1 = :specialname ';

    end if;

    if (str_tapecopyright is not null) then

        l_str_tapecopyright := '%' || lower(str_tapecopyright) || '%';

        v_sql := v_sql || ' and lower(a.tapecopyright) like :tapecopyright ';

    else

        l_str_tapecopyright := '';

        v_sql := v_sql || ' and 1 = :tapecopyright ';

    end if;

--2.

    if (str_specialname is not null) then

        l_str_specialname := '%' || replace(replace(lower(str_specialname), '%', '<%'), '_', '<_') || '%';

         v_sql := v_sql || ' and lower(a.specialname) like :specialname escape ''<'' ';

    else

        l_str_specialname := '';

        v_sql := v_sql || ' and 1 = :specialname ';

    end if;

    if (str_tapecopyright is not null) then

        l_str_tapecopyright := '%' || replace(replace(lower(str_tapecopyright), '%', '<%'), '_', '<_') || '%';

         v_sql := v_sql || ' and lower(a.tapecopyright) like :tapecopyright escape ''<'' ';

    else

        l_str_tapecopyright := '';

        v_sql := v_sql || ' and 1 = :tapecopyright ';

    end if;

--经测试,两者写法均可.

9.页面上选择"按时间排序"的数据库处理方法

--按修改时间排序. 1-时间顺序，2-时间倒序

if ( i_sortorder = 2 ) then

    v_sql := v_sql || ' order by a.createtime desc, a.copyrightid ';

else

    v_sql := v_sql || ' order by a.createtime asc, a.copyrightid ';

end if;