vb 如select * from a where b=' "+###1+" '的语句怎么写才可以筛选两个词只写一个时可以and OR 不行哦 有语法错误 难道是我哪里写错了

select * from a union select * from b 能详细说下么 vb 如select * from a where b=' +###1+ '的语句怎么写才可以筛选两个词只写一个时可以and OR 不行哦 有语法错误 难道是我哪里写错了 解释数SQL面的 select * from a, b 是什么意思如题 select * into b from a where 11 select * from (select a.*,rownum aa from table a ) where aa=10 vb select case 这个语句? 存储过程中单引号中还有一个单引号该怎么办,如：exec('select * from tb where a='xx'') select *from A where A.a like '%1%'||'%' Please select a city or zipcode from the drop-down. Please select a plan from the options to the select * from book limit , insert into a select * from b 和select * into a from b 这两个语句是不是一样的? select id from (select id from pedigree group by number having count(name)>1)as a; 为啥用as a select c.*,d* from ( select 图号 from ( SELECT a.*,b.存货编码 FROM 未明图号 as a left OUTER JOIN 存select c.*,d* from ( select 图号 from (SELECT a.*,b.存货编码FROM 未明图号 as a left OUTER JOIN 存货档案 as bON a.图号=b.规 select case 语句怎么判断在某两个值之间如题 我要把 if a> 3 and a =5 and a 16 and a = 85 Grade = 优秀 Case Is > = 75 Grade = 良好 Case Is > = 70 Grade = 中等 Case Is > = 60 Grade = 及格 end Select 有错误,在vb select from 表 和select from [表]有什么不同? select count(*) from 怎么使用 select count(1) from emp