oracle 基本语句练习(一) where, between ,null, like,转义字符,
1 where 筛选关键字; select * from emp where job 'CLERK' 从emp表中列出 job大于'CLERK'的项 (由于比较的是字符串,所以加单引号) 2 between and select en...
1 where 筛选关键字; select * from emp where job 'CLERK' 从emp表中列出 job大于'CLERK'的项 (由于比较的是字符串,所以加单引号) 2 between and select en...