ERROR:insert or update on table"emp"violates foreign key constraint"emp_ref_dept_fk"DETAIL:Key(deptno)=(0)is not present in table"dept".SELECT empno,ename,deptno FROM emp WHERE empno>9000;empno|ename|deptno-+-+-9001|JONES|...
CURSOR emp_cur IS SELECT empno,ename FROM emp ORDER BY empno;BEGIN OPEN emp_cur;DBMS_OUTPUT.PUT_LINE('Subprocedure list_emp:');DBMS_OUTPUT.PUT_LINE('EMPNO ENAME');DBMS_OUTPUT.PUT_LINE('-');LOOP FETCH emp_cur INTO v_empno,v...
以下简单存储过程演示了如何使用分配运算符将SYSDATE的默认值设置到参数hiredate中：CREATE OR REPLACE PROCEDURE hire_emp(p_empno NUMBER,p_ename VARCHAR2,p_hiredate DATE:=SYSDATE)IS BEGIN INSERT INTO emp(empno,ename,hiredate)...
CREATE OR REPLACE PROCEDURE emp_comp_update(p_empno IN emp.empno%TYPE,p_sal IN emp.sal%TYPE,p_comm IN emp.comm%TYPE)IS BEGIN UPDATE emp SET sal=p_sal,comm=p_comm WHERE empno=p_empno;IF SQL%FOUND THEN DBMS_OUTPUT.PUT_LINE('...
CURSOR emp_cursor IS SELECT empno,sal,comm FROM emp;BEGIN-Calculate the average yearly compensation in the company-SELECT AVG((sal+NVL(comm,0))*24)INTO v_avg FROM emp;DBMS_OUTPUT.PUT_LINE('Average Yearly Compensation:'|TO_...
以下对象类型规格创建emp_obj_typ对象类型：CREATE OR REPLACE TYPE emp_obj_typ AS OBJECT(empno NUMBER(4),ename VARCHAR2(20),addr ADDR_OBJ_TYP,MEMBER PROCEDURE display_emp(SELF IN OUT emp_obj_typ));对象类型emp_obj_typ包含一个...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
创建表emp，并添加数据，命令示例如下：create table if not exists emp(empno bigint,ename string,job string,mgr bigint,hiredate datetime,sal bigint,comm bigint,deptno bigint);tunnel upload emp.txt emp;emp.txt中的数据如下：...
FOR v_emp_rec IN emp_cur_1 LOOP DBMS_OUTPUT.PUT_LINE(v_emp_rec.empno|' '|v_emp_rec.ename);END LOOP;END;实现了相同的结果，如下面的输出所示。EXEC cursor_example;EMPNO ENAME-7369 SMITH 7499 ALLEN 7521 WARD 7566 JONES 7654 ...
CREATE OR REPLACE PROCEDURE emp_delete(p_empno IN emp.empno%TYPE)IS BEGIN DELETE FROM emp WHERE empno=p_empno;IF SQL%FOUND THEN DBMS_OUTPUT.PUT_LINE('Deleted Employee#:'|p_empno);ELSE DBMS_OUTPUT.PUT_LINE('Employee#'|p_...
每当对emp表执行插入、更新或删除操作时，都会向empauditlog表添加一行来记录日期、用户和操作。CREATE TABLE empauditlog(audit_date DATE,audit_user VARCHAR2(20),audit_desc VARCHAR2(20));CREATE OR REPLACE TRIGGER emp_audit_trig ...
CREATE OR REPLACE PROCEDURE verify_emp(p_empno NUMBER)IS v_ename emp.ename%TYPE;v_job emp.job%TYPE;v_mgr emp.mgr%TYPE;v_hiredate emp.hiredate%TYPE;BEGIN SELECT ename,job,mgr,hiredate INTO v_ename,v_job,v_mgr,v_hiredate ...
本节介绍如何删除包或仅删除包正文。删除整个包或仅删除包正文的语法如下：DROP PACKAGE[BODY]package_name;...以下语句仅销毁 emp_admin 的包正文：DROP PACKAGE BODY emp_admin;以下语句将删除整个 emp_admin 包：DROP PACKAGE emp_admin;
下面是一个简单的之前语句级触发器示例，该触发器在对emp表执行插入操作之前显示一条消息。CREATE OR REPLACE TRIGGER emp_alert_trig BEFORE INSERT ON emp BEGIN DBMS_OUTPUT.PUT_LINE('New employees are about to be added');END;以下...
以下示例是一个之前行级触发器，该触发器计算属于部门30并将插入到emp表中的每名新员工的佣金。CREATE OR REPLACE TRIGGER emp_comm_trig BEFORE INSERT ON emp FOR EACH ROW BEGIN IF:NEW.deptno=30 THEN:NEW.comm:=:NEW.sal*.4;END IF;...
ALTER TRIGGER 更改一个现有触发器的属性。...示例 重命名一个现有的触发器：ALTER TRIGGER emp_stamp ON emp RENAME TO emp_track_chgs;把一个触发器标记为依赖于一个扩展：ALTER TRIGGER emp_stamp ON emp DEPENDS ON EXTENSION emplib;
CURSOR emp_cursor IS SELECT empno,(sal+NVL(comm,0))*24 FROM emp;BEGIN OPEN emp_cursor;LOOP FETCH emp_cursor INTO v_empno,v_comp;EXIT WHEN emp_cursor%NOTFOUND;IF v_comp;ELSIF v_comp;ELSIF v_comp;ELSIF v_comp;ELSE v_ge_100K:...
声明游标变量后，必须使用关联的SELECT命令打开它。...CREATE OR REPLACE PROCEDURE emp_by_dept(p_deptno emp.deptno%TYPE)IS emp_refcur SYS_REFCURSOR;BEGIN OPEN emp_refcur FOR SELECT empno,ename FROM emp WHERE deptno=p_deptno;
但是，可通过使用子查询来重新表述该查询以达到预期结果：SELECT ename FROM emp WHERE sal=(SELECT MAX(sal)FROM emp);ename-KING(1 row)子查询是一项独立的计算，它获取自己的结果，与外部查询互不影响。在与 GROUP BY 子句结合使用时，...
创建表emp，并添加数据，命令示例如下：create table if not exists emp(empno bigint,ename string,job string,mgr bigint,hiredate datetime,sal bigint,comm bigint,deptno bigint);tunnel upload emp.txt emp;emp.txt中的数据如下：...
TURNER|7844|7698|Manager BLAKE is emp#7698 2|WARD|7521|7698|Manager BLAKE is emp#7698 1|CLARK|7782|7839|Manager CLARK is emp#7782 2|MILLER|7934|7782|Manager CLARK is emp#7782 1|JONES|7566|7839|Manager JONES is emp#7566 2|...
定义一个列级检查约束：CREATE TABLE emp(empno NUMBER(4)NOT NULL CONSTRAINT emp_pk PRIMARY KEY,ename VARCHAR2(10),job VARCHAR2(9),mgr NUMBER(4),hiredate DATE,sal NUMBER(7,2)CONSTRAINT emp_sal_ck CHECK(sal>0),comm NUMBER(7,2)...
命令示例如下：select deptno,any_value(ename)from emp group by deptno;返回结果如下：+-+-+|deptno|_c1|+-+-+|10|CLARK|20|SMITH|30|ALLEN|+-+-+APPROX_DISTINCT 命令格式。approx_distinct()命令说明。计算指定列的非重复值的近似数目...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
定义 CHECK 表约束：CREATE TABLE emp(empno NUMBER(4)NOT NULL CONSTRAINT emp_pk PRIMARY KEY,ename VARCHAR2(10),job VARCHAR2(9),mgr NUMBER(4),hiredate DATE,sal NUMBER(7,2),comm NUMBER(7,2),deptno NUMBER(2)CONSTRAINT emp_ref_...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
将使用通过联结 emp 和 dept表所生成的以下行：SELECT loc,dname,job,empno FROM emp e,dept d WHERE e.deptno=d.deptno ORDER BY 1,2,3,4;loc|dname|job|empno-+-+-+-BOSTON|OPERATIONS|ANALYST|9002 BOSTON|OPERATIONS|CLERK|9001 BOSTON...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
CREATE OR REPLACE TRIGGER emp_alert_trig AFTER INSERT OR UPDATE OR DELETE ON emp DECLARE v_action VARCHAR2(25);BEGIN IF INSERTING THEN v_action:=' added employee(s)';ELSIF UPDATING THEN v_action:=' updated employee(s)';...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
定义 为了展示数组类型的使用，我们创建这样一个表：CREATE TABLE sal_emp(name text,pay_by_quarter integer[],schedule text[][]);如上所示，一个数组数据类型可以通过在数组元素的数据类型名称后面加上方括号（[]）来命名。上述命令将...
示例 将类型为VARCHAR2的列添加到表中：ALTER TABLE emp ADD address VARCHAR2(30);从表中删除列：ALTER TABLE emp DROP COLUMN address;重命名现有列：ALTER TABLE emp RENAME COLUMN address TO city;重命名现有表：ALTER TABLE emp ...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
请根据您上传数据文件的实际path(路径以及名称)替换emp.txt emp.txt中的数据如下：7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,20 7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30 7521,WARD,SALESMAN,7698,1981-02-22 00:...
创建表emp，并添加数据，命令示例如下：create table if not exists emp(empno bigint,ename string,job string,mgr bigint,hiredate datetime,sal bigint,comm bigint,deptno bigint);tunnel upload emp.txt emp;emp.txt中的数据如下：...
创建表emp，并添加数据，命令示例如下：create table if not exists emp(empno bigint,ename string,job string,mgr bigint,hiredate datetime,sal bigint,comm bigint,deptno bigint);tunnel upload emp.txt emp;emp.txt中的数据如下：...
在使用游标检索行之前，必须先将其打开。这将使用 OPEN 语句完成。...CREATE OR REPLACE PROCEDURE cursor_example IS CURSOR emp_cur_3 IS SELECT empno,ename FROM emp WHERE deptno=10 ORDER BY empno;BEGIN OPEN emp_cur_3;END;
创建表emp，并添加数据，命令示例如下：create table if not exists emp(empno bigint,ename string,job string,mgr bigint,hiredate datetime,sal bigint,comm bigint,deptno bigint);tunnel upload emp.txt emp;emp.txt中的数据如下：...
创建表emp，并添加数据，命令示例如下：create table if not exists emp(empno bigint,ename string,job string,mgr bigint,hiredate datetime,sal bigint,comm bigint,deptno bigint);tunnel upload emp.txt emp;emp.txt中的数据如下：...