方法1:游标循环(Cursor For Loops) 具体逻辑如下: 按一定顺序遍历时间date; where条件的时间范围为[本月第一天,date] 以date分组,这就把在这个时间范围内的数据聚合起来了 FORdateINlist_of_dates LOOP INSERTINTOfinal_table(date, revenue_mtd) SELECT@dateasdate,sum(revenue)asrevenue_mtd FROMsales WHEREsale...
cursormycursorisselect*fromcat; begin openmycursor; loop fetchmycursorintov_tablename,v_tabletype; null;--youcanusetablenameandv_tabletype endloop; closemycursor; endStudyCursor; 最近在看代码是,发现其实我们还有一个更方便的方法就是使用for in loop … end loop createorreplaceprocedureStudyFor( r...
在Case函数中,可以使用BETWEEN,LIKE,IS NULL,IN,EXISTS等等,通过在Case函数中嵌套Case函数,在合计函数中使用Case函数等方法,也可以在Check、触发器等中使用Case。 2、循环分支For和While 2.1For循环 for 变量 in 开始数值...结束数值 loop end loop; 1. 2.2While循环 只要表达式成立就执行循环语句 **while** 条...
Introduction to PL/SQL cursor FOR LOOP statement The cursorFOR LOOPstatement is an elegant extension of the numericFOR LOOPstatement. The numericFOR LOOPexecutes the body of a loop once for every integer value in a specified range. Similarly, the cursorFOR LOOPexecutes the body of the loop onc...
3;FETCHc_num3INTOv_num3;WHILEc_num3%FOUNDLOOP-- 能找到数据则执行循环内语句FETCHc_num3INTOv_num3;ENDLOOP;CLOSEc_num3;END;-- forDECLAREv_num2VARCHAR2(100);CURSORc_num2ISSELECTNAMEFROMtest_tWHEREROWNUM<600000;BEGINdbms_output.enable(800000);FORxINc_num2LOOPv_num2:=x.name;ENDLOOP;...
OPEN emp_cursor; 使用FOR循环遍历游标中的每一行数据 FOR employee IN emp_cursor LOOP 将当前行的薪水加到总薪水上 total_salary := total_salary + employee.salary; END LOOP; 关闭游标 CLOSE emp_cursor; 输出总薪水 DBMS_OUTPUT.PUT_LINE('Total salary: ' || total_salary); ...
oracle pl sql for循环游标 EMP表在SCOTT用户下。用SCOTT/TIGER登录。 代码: DECLARE CURSOR C_JOB IS SELECT EMPNO, ENAME, JOB, SAL FROM EMP WHERE JOB = 'MANAGER'; C_ROW C_JOB%ROWTYPE; BEGIN FOR C_ROW IN C_JOB LOOP DBMS_OUTPUT.put_line(C_ROW.EMPNO || '-' || C_ROW.ENAME || '...
2 例二：使用LOOP循环 --- CREATE PROCEDURE TEST_LOOP LANGUAGE SQL BEGIN DECLARE code_v char(10); DECLARE salary_v integer; DECLARE city_v char(20);DECLARE C1 CURSOR FOR ---SELECT code,salary,city FROM employee WHERE city="Beijing"; OPEN C1; loop_label: LOOP ...
CURSOR c_employees IS SELECT name, salary FROM employees; v_name employees.name%TYPE; v_salary employees.salary%TYPE; BEGIN OPEN c_employees; LOOP FETCH c_employees INTO v_name, v_salary; EXIT WHEN c_employees%NOTFOUND; DBMS_OUTPUT.PUT_LINE('Name: ' || v_name || ', Salary: ' ||...
DECLARE C1 CURSOR FOR ---SELECT code,salary,city FROM employee WHERE city="Beijing"; OPEN C1; loop_label: LOOP - FETCH C1 INTO code_v,salary_v,city_v; --IF SQLCODE=0 THEN ---SET salary_v=salary_v*1.1; ---UPDATE employee SET salary=salary_v#p# ---WHERE...