oracle安装参照： Oracle数据库之安装教程
Oracle数据库总结：
Oracle数据库之基本查询
Oracle数据库之单行函数
Oracle数据库之多行函数
Oracle数据库之多表查询
sql> –查询10号部门的员工
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> –字符串大小写敏感
sql> –查询名叫KING的员工*
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> –查询入职日期是17-11月-81的员工信息*
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’;
会话已更改。
*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’;
会话已更改。
***sql> –between… and
sql> –查询薪水1000~2000之间的员工*
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> –查询部门号是10和20的员工*
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> –模糊查询
sql> –查询名字以S打头的员工*
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> –查询名字是4个字的员工
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> – 插入记录
sql> insert into emp(empno,ename,sal,deptno) values(1001,’Tom_AB’,3000,10);
已创建 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> –查询名字中含有下划线的员工
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> –转义字符
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> –查询员工信息，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，表达式，别名，序号
sql> select ename,sal*12
2 from emp
3 order by sal*12 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> –多个列排序
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只作用于离他最近的一列
sql> –查询员工信息，按照奖金排序
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数据库总结：
Oracle数据库之集合运算
Oracle数据库之数据处理
Oracle数据库之建表和管理表
Oracle数据库之对象视图、索引、序列、同义词
