Oracle本身默认的是单引号,但是在大家写存储过程或者写SQL语句时,有时候需要拼SQL或者是SQL的值里需要传入含单引号的值,此时就需要使用两个单引号''''来进行转义,其实oracle本身提供了这种转换默认单引号为其他标识的方法那就是--"q" q [Oracle's quote operator] q'c text-to-be-quoted c' c is a single character (called the quote delimiter). With the «qu
1.一般操作符 (1)!= 不等于 select empno,ename,job from scott.emp where job!='manager' (2)^= 不等于 select empno,ename,job from scott.emp where job^='manager' (3)<>不等于 select empno,ename,job from scott.emp where job<>'manager' (4)<小于 (5)>大于 (6)<=小
1.Oracle 别名 如果非固定格式的列名可以如此 select last_name as name from employees 如果想显示固定格式的别名的话,则别名必须使用""引起来: 如: select last_name as "Name" from emloyees 如果别名之间有空格,则必须使用""引起 如: select last as "Person Name" from employees 2.Oracle
[B]第一部分.SQL&PL/SQL[/B][Q]怎么样查询特殊字符,如通配符%与_[A]select * from table where name like 'A\_%' escape '\' [Q]如何插入单引号到数据库表中[A]可以用ASCII码处理,其它特殊字符如&也一样,如 insert into t values('i'||chr(39)||'m'); -- chr(39)代表字符'或者用两个单引号表示一个or insert into t values('I''m');
本文转自:http://www.connectionstrings.com/oracle/ Standard Data Source=MyOracleDB;Integrated Security=yes; This one works only with Oracle 8i release 3 or later Oracle Specifying username and password Data Source=MyOracleDB;User Id=myUsername;Password=my
SQL Fundamentals || Oracle SQL语言 Capabilities of the SELECT Statement(SELECT语句的功能) Data retrieval from data base is done through appropriate and efficient use of SQL. Three concepts from relational theory encompass the capability of the SELECT statem
!= 不等于 select empno,ename,job from scott.emp where job!='manager' ^= 不等于 select empno,ename,job from scott.emp where job^='manager' <>不等于 select empno,ename,job from scott.emp where job<>'manager' <小于 select sal from scott.emp where sal<