oracle安裝參照： Oracle數據庫之安裝教程

Oracle數據庫總結：

Oracle數據庫之基本查詢
Oracle數據庫之單行函數
Oracle數據庫之多行函數
Oracle數據庫之多表查詢

SQL> --查詢10號部門的員工
SQL> select *
2 from emp
3 where deptno=10;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7782 CLARK MANAGER 7839 09-6月 -81 2450 10 7839 KING PRESIDENT 17-11月-81 5000 10 7934 MILLER CLERK 7782 23-1月 -82 1300 10

SQL> --字符串大小寫敏感
SQL> --查詢名叫KING的員工
SQL> select *
2 from emp
3 where ename=‘KING’;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7839 KING PRESIDENT 17-11月-81 5000 10

SQL> --日期格式敏感
SQL> --查詢入職日期是17-11月-81的員工信息
SQL> select *
2 from emp
3 where hiredate=‘17-11月-81’;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7839 KING PRESIDENT 17-11月-81 5000 10

SQL> --改日期格式
SQL> select * from v$nls_parameters;

PARAMETER VALUE ---------------------------------------------------------------- ---------------------------------------------------------------- NLS_LANGUAGE SIMPLIFIED CHINESE NLS_TERRITORY CHINA NLS_CURRENCY ￥ NLS_ISO_CURRENCY CHINA NLS_NUMERIC_CHARACTERS ., NLS_CALENDAR GREGORIAN NLS_DATE_FORMAT DD-MON-RR NLS_DATE_LANGUAGE SIMPLIFIED CHINESE NLS_CHARACTERSET ZHS16GBK NLS_SORT BINARY NLS_TIME_FORMAT HH.MI.SSXFF AM PARAMETER VALUE ---------------------------------------------------------------- ---------------------------------------------------------------- NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR NLS_DUAL_CURRENCY ￥ NLS_NCHAR_CHARACTERSET AL16UTF16 NLS_COMP BINARY NLS_LENGTH_SEMANTICS BYTE NLS_NCHAR_CONV_EXCP FALSE

SQL> alter session set NLS_DATE_FORMAT=‘yyyy-mm-dd’;

會話已更改。

SQL> select *
2 from emp
3 where hiredate=‘1981-11-17’;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- ---------- ----- ---------- ---------- 7839 KING PRESIDENT 1981-11-17 5000 10

SQL> alter session set NLS_DATE_FORMAT=‘DD-MON-RR’;

會話已更改。

SQL> --between… and
SQL> --查詢薪水1000~2000之間的員工
SQL> select *
2 from emp
3 where sal between 1000 and 2000;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7499 ALLEN SALESMAN 7698 20-2月 -81 1600 300 30 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 7654 MARTIN SALESMAN 7698 28-9月 -81 1250 1400 30 7844 TURNER SALESMAN 7698 08-9月 -81 1500 0 30 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7934 MILLER CLERK 7782 23-1月 -82 1300 10

SQL> --in 在集合中
SQL> --查詢部門號是10和20的員工
SQL> select *
2 from emp
3 where deptno in (10,20);

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7369 SMITH CLERK 7902 17-12月-80 800 20 7566 JONES MANAGER 7839 02-4月 -81 2975 20 7782 CLARK MANAGER 7839 09-6月 -81 2450 10 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20 7839 KING PRESIDENT 17-11月-81 5000 10 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7902 FORD ANALYST 7566 03-12月-81 3000 20 7934 MILLER CLERK 7782 23-1月 -82 1300 10

SQL> --模糊查詢
SQL> --查詢名字以S打頭的員工
SQL> select *
2 from emp
3 where ename like ‘S%’;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7369 SMITH CLERK 7902 17-12月-80 800 20 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20

SQL> --查詢名字是4個字的員工
1 select *
2 from emp
3* where ename like ‘____’
SQL> /

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 7839 KING PRESIDENT 17-11月-81 5000 10 7902 FORD ANALYST 7566 03-12月-81 3000 20

SQL> – 插入記錄
SQL> insert into emp(empno,ename,sal,deptno) values(1001,‘Tom_AB’,3000,10);

已創建 1 行。

SQL> select * from emp;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 1001 Tom_AB 3000 10 7369 SMITH CLERK 7902 17-12月-80 800 20 7499 ALLEN SALESMAN 7698 20-2月 -81 1600 300 30 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 7566 JONES MANAGER 7839 02-4月 -81 2975 20 7654 MARTIN SALESMAN 7698 28-9月 -81 1250 1400 30 7698 BLAKE MANAGER 7839 01-5月 -81 2850 30 7782 CLARK MANAGER 7839 09-6月 -81 2450 10 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20 7839 KING PRESIDENT 17-11月-81 5000 10 7844 TURNER SALESMAN 7698 08-9月 -81 1500 0 30 EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7900 JAMES CLERK 7698 03-12月-81 950 30 7902 FORD ANALYST 7566 03-12月-81 3000 20 7934 MILLER CLERK 7782 23-1月 -82 1300 10

SQL> --查詢名字中含有下劃線的員工
SQL> select *
2 from emp
3 where ename like ‘%_%’;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 1001 Tom_AB 3000 10 7369 SMITH CLERK 7902 17-12月-80 800 20 7499 ALLEN SALESMAN 7698 20-2月 -81 1600 300 30 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 7566 JONES MANAGER 7839 02-4月 -81 2975 20 7654 MARTIN SALESMAN 7698 28-9月 -81 1250 1400 30 7698 BLAKE MANAGER 7839 01-5月 -81 2850 30 7782 CLARK MANAGER 7839 09-6月 -81 2450 10 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20 7839 KING PRESIDENT 17-11月-81 5000 10 7844 TURNER SALESMAN 7698 08-9月 -81 1500 0 30 EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7900 JAMES CLERK 7698 03-12月-81 950 30 7902 FORD ANALYST 7566 03-12月-81 3000 20 7934 MILLER CLERK 7782 23-1月 -82 1300 10

SQL> --轉義字符
1 select *
2 from emp
3* where ename like ‘%_%’ escape ‘’
SQL> /

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 1001 Tom_AB 3000 10

SQL> --查詢員工信息，按照月薪排序
SQL> select *
2 from emp
3 order by sal;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7369 SMITH CLERK 7902 17-12月-80 800 20 7900 JAMES CLERK 7698 03-12月-81 950 30 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 7654 MARTIN SALESMAN 7698 28-9月 -81 1250 1400 30 7934 MILLER CLERK 7782 23-1月 -82 1300 10 7844 TURNER SALESMAN 7698 08-9月 -81 1500 0 30 7499 ALLEN SALESMAN 7698 20-2月 -81 1600 300 30 7782 CLARK MANAGER 7839 09-6月 -81 2450 10 7698 BLAKE MANAGER 7839 01-5月 -81 2850 30 7566 JONES MANAGER 7839 02-4月 -81 2975 20 EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20 7902 FORD ANALYST 7566 03-12月-81 3000 20 7839 KING PRESIDENT 17-11月-81 5000 10

SQL> --order by 后面 + 列，表達式，別名，序號
SQL> select ename,sal,sal12
2 from emp
3 order by sal12 desc;

ENAME SAL SAL*12 -------- ----- ---------- KING 5000 60000 FORD 3000 36000 SCOTT 3000 36000 JONES 2975 35700 BLAKE 2850 34200 CLARK 2450 29400 ALLEN 1600 19200 TURNER 1500 18000 MILLER 1300 15600 WARD 1250 15000 MARTIN 1250 15000 ENAME SAL SAL*12 -------- ----- ---------- ADAMS 1100 13200 JAMES 950 11400 SMITH 800 9600

SQL> --多個列排序
SQL> select *
2 from emp
3 order by deptno,sal;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7934 MILLER CLERK 7782 23-1月 -82 1300 10 7782 CLARK MANAGER 7839 09-6月 -81 2450 10 7839 KING PRESIDENT 17-11月-81 5000 10 7369 SMITH CLERK 7902 17-12月-80 800 20 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7566 JONES MANAGER 7839 02-4月 -81 2975 20 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20 7902 FORD ANALYST 7566 03-12月-81 3000 20 7900 JAMES CLERK 7698 03-12月-81 950 30 7654 MARTIN SALESMAN 7698 28-9月 -81 1250 1400 30 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7844 TURNER SALESMAN 7698 08-9月 -81 1500 0 30 7499 ALLEN SALESMAN 7698 20-2月 -81 1600 300 30 7698 BLAKE MANAGER 7839 01-5月 -81 2850 30

SQL> --order by 作用于后面所有的列，desc只作用于離他最近的一列

SQL> --查詢員工信息，按照獎金排序
SQL> select *
2 from emp
3 order by comm;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7844 TURNER SALESMAN 7698 08-9月 -81 1500 0 30 7499 ALLEN SALESMAN 7698 20-2月 -81 1600 300 30 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 7654 MARTIN SALESMAN 7698 28-9月 -81 1250 1400 30 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20 7839 KING PRESIDENT 17-11月-81 5000 10 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7900 JAMES CLERK 7698 03-12月-81 950 30 7902 FORD ANALYST 7566 03-12月-81 3000 20 7934 MILLER CLERK 7782 23-1月 -82 1300 10 7698 BLAKE MANAGER 7839 01-5月 -81 2850 30 EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7566 JONES MANAGER 7839 02-4月 -81 2975 20 7369 SMITH CLERK 7902 17-12月-80 800 20 7782 CLARK MANAGER 7839 09-6月 -81 2450 10

SQL> --a命令 append
SQL> a desc
3* order by comm desc
SQL> /

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ---------- -------- --------- ---------- -------------- ----- ---------- ---------- 7369 SMITH CLERK 7902 17-12月-80 800 20 7782 CLARK MANAGER 7839 09-6月 -81 2450 10 7902 FORD ANALYST 7566 03-12月-81 3000 20 7900 JAMES CLERK 7698 03-12月-81 950 30 7876 ADAMS CLERK 7788 23-5月 -87 1100 20 7566 JONES MANAGER 7839 02-4月 -81 2975 20 7698 BLAKE MANAGER 7839 01-5月 -81 2850 30 7934 MILLER CLERK 7782 23-1月 -82 1300 10 7788 SCOTT ANALYST 7566 19-4月 -87 3000 20 7839 KING PRESIDENT 17-11月-81 5000 10 7654 MARTIN SALESMAN 7698 28-9月 -81 1250 1400 30 7521 WARD SALESMAN 7698 22-2月 -81 1250 500 30 7499 ALLEN SALESMAN 7698 20-2月 -81 1600 300 30 7844 TURNER SALESMAN 7698 08-9月 -81 1500 0 30

Oracle數據庫總結：

Oracle數據庫之集合運算
Oracle數據庫之數據處理
Oracle數據庫之建表和管理表
Oracle數據庫之對象視圖、索引、序列、同義詞

總結

以上是生活随笔為你收集整理的Oracle数据库之过滤和排序的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。