最近，在看SQL Cookbook真的很不錯的一本書，許多解決方案，都十分精妙，真切的體會到了，SQL的強大。

注：我用的是ORACLE 11g

下面是書2.4中的一個例項--對字母數字混合的資料序列的排序

首先，我們需要書中的一張表emp，書中沒有提供建表的檔案或者是語句。我用的是ORACLE資料庫，按照書上的資料自己建的emp表，隨便建一個表，然後把資料存起來，下面是資料插入的SQL，你們有福啦，就不要一條條輸入了，PS：本來想上傳emp表的dump檔案的，可是上傳限制。

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7369, 'SMITH', 'CLERK', 7902, '17-DEC-1980', 800, null, 20);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7499, 'ALLEN', 'SALESMAN', 7698, '20-FEB-1981', 1600, 300, 30);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7521, 'WARD', 'SALESMAN', 7698, '20-FEB-1981', 1250, 500, 30);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7566, 'JONES', 'MANAGER', 7839, '02-APR-1981', 2975, null, 20);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7654, 'MARTIN', 'SALESMAN', 7698, '28-SEP-1981', 1250, 1400, 30);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7698, 'BLAKE', 'MANAGER', 7839, '01-MAY-1981', 2850, null, 30);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7782, 'CLARK', 'MANAGER', 7839, '09-JUN-1981', 2450, null, 10);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7788, 'SCOTT', 'ANALYST', 7566, '09-DEC-1982', 3000, null, 20);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7839, 'KING', 'PRESIDENT', null, '17-NOV-1981', 5000, null, 10);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7844, 'TURNER', 'SALESMAN', 7698, '08-SEP-1981', 1500, 0, 30);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7876, 'ADAMS', 'CLERK', 7788, '12-JAN-1983', 1100, null, 20);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7900, 'JAMES', 'CLERK', 7698, '03-DEC-1981', 950, null, 30);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7902, 'FORD', 'ANALYST', 7566, '03-DEC-1981', 3000, null, 20);

insert into emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
values (7934, 'MILLER', 'CLERK', 7782, '23-JAN-1982', 1300, null, 10);
 

建好表，插好資料，然後，建一個檢視，語句如下，

CREATE VIEW v
AS
SELECT ename||' '||deptno AS DATA
FROM emp

1. 分離出數字，通過數字(DEPTNO)排序查詢結果，經ORACLE資料庫驗證，可行，SQL如下：

SELECT DATA
  FROM V
 ORDER BY REPLACE(DATA,
                  REPLACE(TRANSLATE(DATA, '0123456789', '##########'),
                          '#',
                          ''),
                  '');
 

SELECT DATA
  FROM V
 ORDER BY REPLACE(TRANSLATE(DATA, '0123456789', '##########'), '#', '');

SELECT DATA,
       REPLACE(DATA,
               REPLACE(TRANSLATE(DATA, '0123456789', '##########'), '#', ''),
               '') NUMS,
       REPLACE(TRANSLATE(DATA, '0123456789', '##########'), '#', '') CHARS
  FROM V;
 

SQL，如此強大，學到了，哈哈。