comp_update procedure introduced in UPDATE,with the addition of the RETURNING INTO clause: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 v_empno emp....
Variable declared in blocks such as subprograms or anonymous blocks can be accessed from the executable section or the exception section of other blocks depending on their relative location.Accessing a variable means being...
In this case,the sample output is the same as that of the preceding example.Instead of individually assigning each field of the record,a record-level assignment can be made from r_emp to emp_arr.DECLARE TYPE emp_rec_typ IS...
sal_query by using the user-defined record type and record variable.CREATE OR REPLACE PROCEDURE emp_sal_query(p_empno IN emp.empno%TYPE)IS TYPE emp_typ IS RECORD(ename emp.ename%TYPE,job emp.job%TYPE,hiredate emp.hiredate%...
CURSOR emp_cur_3 IS SELECT empno,ename FROM emp WHERE deptno=10 ORDER BY empno;BEGIN OPEN emp_cur_3;FETCH emp_cur_3 INTO v_empno,v_ename;END;Instead of explicitly declaring the data type of a target variable,%TYPE can be ...
FOR i IN 1.t_emp.COUNT LOOP DBMS_OUTPUT.PUT_LINE(t_emp(i).empno|' '|RPAD(t_emp(i).ename,8)|' '|RPAD(t_emp(i).job,10)|' '|TO_CHAR(t_emp(i).hiredate,'DD-MON-YY')|' '|TO_CHAR(t_emp(i).sal,'99,999.99')|' '|TO_CHAR(NVL(t_emp(i)...
BEGIN SELECT ename,job,hiredate,sal,deptno INTO r_emp.ename,r_emp.job,r_emp.hiredate,r_emp.sal,r_emp.deptno FROM emp WHERE empno=p_empno;DBMS_OUTPUT.PUT_LINE('Employee#:'|p_empno);DBMS_OUTPUT.PUT_LINE('Name:'|r_emp.ename);...
ERROR:INSERT is illegal on emp.CONTEXT:PL/pgSQL function process_emp_audit()line 12 at RAISE testdb=ALTER TRIGGER emp_audit DISABLE;ALTER TRIGGER testdb=insert into emp values(1,'Alice');INSERT 0 1 testdb=ALTER TRIGGER emp...
DBMS_OUTPUT.PUT_LINE('City/State/Zip:'|v_emp.addr.city|','|v_emp.addr.state|' '|LPAD(v_emp.addr.zip,5,'0'));END;下面是此匿名块的输出：Employee No:9001 Name:JONES Street:123 MAIN STREET City/State/Zip:EDISON,NJ 08817 方法的...
Create the 'emp' table-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...
Create the 'emp' table-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...
The following result is returned:QUERY PLAN-Hash Join(cost=24.40.42.49 rows=640 width=52)Hash Cond:(a.mgr=emp.empno)-Seq Scan on emp a(cost=0.00.16.40 rows=640 width=38)-Hash(cost=16.40.16.40 rows=640 width=26)-Seq Scan on...
opened again.The result set from the previously opened cursor variable will be lost.The example is completed with the addition of the CLOSE statement:CREATE OR REPLACE PROCEDURE emp_by_dept(p_deptno emp.deptno%TYPE)IS emp_...
本文介绍了PolarStore的 弹性内存池（Elastic Memory Pool，简称 EMP）技术，结合高速网络和智能缓存，大幅降低数据读取延迟，提升 PolarDB 在I/O密集型负载下的性能表现。背景介绍 PolarDB 采用计算与存储分离架构，在提供强大弹性的同时...
The variable v_emp is declared with a previously defined object type named EMP_OBJ_TYPE.The body of the block initializes the variable by using the emp_obj_type and addr_obj_type constructors.You can include the NEW ...
Attach a comment to the empno column of the emp table:COMMENT ON COLUMN emp.empno IS 'Employee identification number';Delete the comments:COMMENT ON TABLE emp IS '';COMMENT ON COLUMN emp.empno IS '';View comments for emp ...
以下示例说明了 CLOSE 语句的用法：CREATE OR REPLACE PROCEDURE cursor_example IS v_emp_rec emp%ROWTYPE;CURSOR emp_cur_1 IS SELECT*FROM emp;BEGIN OPEN emp_cur_1;FETCH emp_cur_1 INTO v_emp_rec;DBMS_OUTPUT.PUT_LINE('Employee ...
and query the pairs of rows whose values match.You can execute the following statement to achieve this purpose:SELECT emp.ename,emp.sal,dept.deptno,dept.dname,dept.loc FROM emp,dept WHERE emp.deptno=dept.deptno ORDER BY ...
修改后的 emp 表如下所示：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...
CREATE TRIGGER emp_audit INSTEAD OF INSERT OR UPDATE OR DELETE ON emp_view FOR EACH ROW BEGIN-执行 emp 上所要求的操作，并且在 emp_audit 中创建一行来反映对 emp 的改变。IF(TG_OP='DELETE')THEN DELETE FROM emp WHERE empname=...
CURSOR emp_cursor IS SELECT empno,ename,deptno FROM emp;BEGIN OPEN emp_cursor;DBMS_OUTPUT.PUT_LINE('EMPNO ENAME DEPTNO DNAME');DBMS_OUTPUT.PUT_LINE('-');LOOP FETCH emp_cursor INTO v_empno,v_ename,v_deptno;EXIT WHEN emp_...
In the following example,an IF-THEN statement is used to test and display employees who have a commission.DECLARE v_empno emp.empno%TYPE;v_comm emp.comm%TYPE;CURSOR emp_cursor IS SELECT empno,comm FROM emp;BEGIN OPEN emp_...
The package body contains the actual implementation behind the package specification.For the preceding emp_admin package specification,you must create a package body that implements the specification.The body contains the ...