1.for in loop形式 DECLARE CURSOR c_sal IS SELECT employee_id, first_name || last_name ename, salary FROM employees ; BEGIN --隐含打开游标 FOR v_sal IN c_sal LOOP --隐含执行一个FETCH语句 DBMS_OUTPUT.PUT_LINE(to_char(v_sal.employee_id)||'---'|| v_sal.ename||'---'||to_char...
emps.LAST LOOP IF emps(emp).department_id = dept.department_id THEN DBMS_OUTPUT.PUT_LINE(' 员工ID: ' || emps(emp).employee_id || ', 姓名: ' || emps(emp).first_name || ' ' || emps(emp).last_name); END IF; END LOOP; END LOOP; END; 复制代码 这些示例展示了如何在Oracle中...
select*bulk collect into v_dept from dept;--循环除数v_dept变量中的值forv_i in v_dept.first..v_dept.last loop dbms_output.put_line('部门编号:'||v_dept(v_i).deptno||',部门名称:'||v_dept(v_i).dname||'部门位置:'||v_dept(v_i).loc); end loop; end;...
Oracle for循环语句还可以与游标一起使用，以遍历查询结果集的每一行，并对每一行执行指定的操作。下面是一个使用游标的Oracle for循环程序语句示例：```DECLARE cursor_emp CURSOR IS SELECT employee_id, first_name, last_name FROMemployees;emp_rec employees%ROWTYPE;BEGIN FOR emp_rec IN cursor_emp LOOP D...
ROW_CUR_FIRST_INDEX CUR_FIRST_INDEX%ROWTYPE; /*游标处理*/ BEGIN /*遍历显式游标*/ --FOR 循环 FOR ROW_CUR_FIRST_INDEX IN CUR_FIRST_INDEX LOOP --循环体 DBMS_OUTPUT.PUT_LINE('{"ID":"' || ROW_CUR_FIRST_INDEX.A_ID || '","名称":"' || ROW_CUR_FIRST_INDEX.A_INDEXNAME || '...
根据以上的实验数据可以知道:ASSM的三级位图块之间以单向指针相连,Segment Header是一个例外,同时记录First和Last三级位图块的地址,使得三级位图块的链接形成了一个链接环,从而实现了三级位图块之间的导航。 尽管ASSM显示出了令人激动的特性并能够简化Oracle DBA的工作,但是Oracle 9iR2的位图分段管理还是有一些局限性的...
DECLARE l_names DBMS_UTILITY.maxname_array; BEGIN l_names (1) := 'Strawberry'; l_names (10) := 'Blackberry'; l_names (2) := 'Raspberry'; FOR indx IN l_names.FIRST .. l_names.LAST LOOP DBMS_OUTPUT.put_line (l_names (indx)); END LOOP; END; /...
This metric is computed as follows: Date of first Lead Activity - Lead assigned date The average number of Lead Activities per Team member. The rate of Activities for Leads. This metric is computed as follows: 100 * # of Lead Activities/# of Leads The days since the last Lead Activity....
FIRST、LAST函数 返回可用的最小(FIRST)和最大(LAST)集合下标 LIMIT函数 返回VARRAY中允许ude最大元素数量 PRIOD、NEXT函数 返回紧挨着指定的下标之前(PRIOD)或者之后(NEXT)的下标值。你应该总是用PRIOD和NEXT在集合内遍历,尤其在使用稀疏(或者可能是稀疏)集合时更是如此 ...
(partition by b.rn order by a.fid,a.bid rows between unbounded preceding and unbounded following)fid1,last_value(a.fid)over(partition by b.rn order by a.fid,a.bid rows between unbounded preceding and unbounded following)fid2,first_value(decode(sign(range2-range1),1,a.bid+((b.rn-a....