⑴ sql多条件语句查询怎么写
我用过一个笨方法,定义多个局部变量,每个变量为一种查询条件,然后在winform中根据筛选条件进行变量的合并与赋值,得到最终的查询条件,然后再执行sql语句就行啦。俺自学的.net,分享一下当时折腾了一个星期的心得,呵呵
⑵ SQL多条件查询语句
select * from tab_name where 组号='001组' and to_char(日期,'yyyy-mm-dd')='2013-04-15' and 姓名1='小王'
union all
select * from tab_name where 组号='001组' and to_char(日期,'yyyy-mm-dd')='2013-04-15' and 姓名2='小王'
union all
select * from tab_name where 组号='001组' and to_char(日期,'yyyy-mm-dd')='2013-04-15' and 姓名3='小王'
union all
select * from tab_name where 组号='001组' and to_char(日期,'yyyy-mm-dd')='2013-04-15' and 姓名4='小王'
或者是:
select * from tab_name where 组号='001组' and to_char(日期,'yyyy-mm-dd')='2013-04-15' and 姓名1='小王' or 姓名2='小王' or 姓名3='小王' or 姓名4='小王'
⑶ SQL多条件查询语句应怎么写
告诉你个好办法,
在where后面加 1=1
然后呢, 把 And 加到前面, 试试这个
============================================================
str = "select * from UserInformation where 1 = 1 " +
" And ID like '" + Flag[0] + "' "
" And Name like '" + Flag[1] + "' " +
" And Age like '" + Flag[2] + "' " +
" And Sex like '" + Flag[3] + "' " +
" And Cale like '" + Flag[4] + "' " +
" And Encation like '" + Flag[5] + "' " +
" And Salary like '" + Flag[6] + "' " +
" And Contact like '" + Flag[7] + "' " +
" And Address like '" + Flag[8] + "' ";
而且我发现你的第一个like 写错了。
"ID lile '" + Flag[0] + "' and " +
----
晕, 没有分啊。。。。。
⑷ sql多条件查询
selectidfromtablewhereidin(select*fromtablewhereposition=21)andCheckboxin(25,33);
or
=21andCheckboxin(25,33);
这两种都能实现,至于哪个效率高我就不太清楚了
⑸ SQL 多条件查询语句
select top 1 * from table where 许用合力 > 75 and 许用扭矩 > 10 and 传动滚筒直径 = 1000 order by 许用扭矩, 许用合力
--输出结果就是先符合条件数据,再按许用扭矩和许用合力的升序排列,然后选取第一条,即最近的一条数据。
⑹ sql多条件查询语句
SQL="select*from档案where1=1"
IfCombo1.Text<>"全部"Then
SQL=SQL&"and"&"姓名='"&Combo1.Text&"'"
Endif
IfCombo2.Text<>"全部"Then
SQL=SQL&"and"&"年龄='"&Combo2.Text&"'"
Endif
IfCombo3.Text<>"全部"Then
SQL=SQL&"and"&"身高='"&Combo3.Text&"'"
Endif
IfCombo4.Text<>"全部"Then
SQL=SQL&"and"&"体重='"&Combo4.Text&"'"
Endif
⑺ SQL语句多条件查询
select * from student where name not in
(select name from student where grade<80)