sql = sql & "and 诗名='" & Trim(Text2.Text) & 希望得到解答

sql = sql & and 诗名=' & Trim(Text2.Text) & 希望得到解答 sql = sql + and title like '% + nkeyword.ToString().Trim() + %';怎么解释 sql=select * from x where Min>2 and max SQL >select count(*) from Teacher where teacherCode=? and teacherPassword=? java.sql.SQLException:SQL >select count(*) from Teacher where teacherCode=? and teacherPassword=?java.sql.SQLException: Can not issue executeUpdate() for SELECTsat com.mysql. 请问下面这段代码sql=id is not null和下面的sql=sql& and……怎么理解?select case request(eeeet)case print_csql=id is not nullif request(ClientCountry)全部 then'国家/地区不为全部时sql=sql& and ClientCountry='& SQL中AND B.DEPT_CODE = P.DEPT_CODE(+) 后面的（+） sql case when请教请教sql中case when 判断语句select 姓名,工龄,(case when (工龄>= '35') then 90%when (工龄>='30' and 工龄='20' and 工龄='10' and 工龄 请问sql=select * from 招聘信息 order by id oracle sql 语句中where条件中 1=1 SQL isnull( )函数的用法.比如isnull(a,' ')=' sql语句中year(getdate())-year(birthday)=22是什么意思? Set rs = conn.Execute(sql)是什么意思啊?VB,遇到这么一句Set rs = conn.Execute(sql)其中的conn.Execute(sql)表示什么啊?SQL是在别的程序段查询出来的. java.sql.SQLException: Illegal operation on empty result set.import java.sql.Connection;import java.sql.ResultSet;import java.sql.Statement;public class shujuku { public static void main(String args[]) { Connection conn; conn = Conn [SQL]GROUP sql怎么选择数据and和or能同时用吗?sql=select * from y2_10000 where yewu='&session(name)&' and zt='加入排队' or zt='领钱成功' order by id desc $sql=SELECT count(*) as pcount FROM news 和$sql = UPDATE article SET这句是什么意思? 大侠这个查询语句的意思是什么?sql=select DISTINCT 日期 from +tablename+ where 日期>=' +df +' and 日期 在SQL语句中WHERE pud_id=titles.pub_id AND city LIKE'B%'是什么意思起到什么作用有,