www.3112.net > SQL查询中,"SELECT 学号,姓名,性别 FROM 学生 W...

SQL查询中,"SELECT 学号,姓名,性别 FROM 学生 W...

String s = "sf"; String sql = "select * from stu where stuName like '%"+s+"%'";

string sql=string.Format("select * from student where date='{0}' ",DateTime.Parse("2014-08-16 13:00:00")); 改成上面语句试试先,如果上面语句运行不报错说明是你的txtDate.Text不是时间格式的字符串

from e191_sporter x --x是e191_sporter的临时表名字, from e191_sporter w,e191_grade y --w y也是 from e191_grade z 这些可以这样写:from e191_grade as z (其中一个作用就是简化写法) y.pno 其实就是e191_grade.pno

这两个东西看起来应该是自定义的两个函数,比如sql_r的作用可能是执行括号里面的select语句,得到的结果集合赋值给rs

1.select * from works where not exists(select 1 from data_1 where works.id=data_1.w_id) 2..select * from works where exists(select 1 from data_1 where works.id=data_1.w_id)

--查询一: select w.id,w.name,w.format,w.type from works w where not exists ( select 1 from data_1 d where exists ( select 1 from user u where u.name='NO02' and u.id=d.u_id ) and w.id=d.w_id ); --查询二: seelct d.id,w.name,d.A,d...

SELECT A.srctermid, B.serviceid FROM A LEFT JOIN B ON A.servicecode = B.servicecode AND A.srctermid = B.srctermid B表的数据只有23W。现在用你这个语句查询出来是80多W. A表的数据只有6W 如果这样的话,估计是一个srctermid, serviceid...

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