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題目描述：

對員工表中所有員工的姓名做如下處理：姓名的首字母在‘A‘到‘G‘ 之間，合並為第一個字符串，在‘H‘到‘O‘之間，合並為第二個字符串，在‘P‘到‘Z‘之間，合並為第三個字符串，姓名之間用空格相隔。

代碼：

DECLARE
str1 string(100);
str2 string(100);
str3 string(100);
CURSOR NAME_AG IS
SELECT ENAME FROM EMP WHERE substr(ENAME,0,1) BETWEEN ‘A‘ AND
 
 ‘G‘;
name1 emp.ENAME%TYPE;
CURSOR NAME_HO IS
SELECT ENAME FROM EMP WHERE substr(ENAME,0,1) BETWEEN ‘H‘ AND ‘O‘;
name2 emp.ENAME%TYPE;
CURSOR NAME_PZ IS
SELECT ENAME FROM EMP WHERE substr(ENAME,0,1) BETWEEN ‘P‘ AND ‘Z‘;
name3 emp.ENAME%TYPE;
BEGIN
OPEN NAME_AG;
OPEN NAME_HO;
OPEN NAME_PZ;

LOOP
    FETCH
 
 NAME_AG INTO name1;
    EXIT WHEN NAME_AG%NOTFOUND;
    str1:=str1||name1||‘ ‘;
END LOOP;
LOOP
    FETCH NAME_HO INTO name2;
    EXIT WHEN NAME_HO%NOTFOUND;
    str2:=str2||name2||‘ ‘;
END LOOP;
LOOP
    FETCH NAME_PZ INTO name3;
    EXIT WHEN NAME_PZ%NOTFOUND;
    str3:=str3||name3||‘ ‘;
END LOOP;
dbms_output.put_line(str1);
dbms_output.put_line(str2);
dbms_output.put_line(str3);
 
END;

PL/SQL 上機練習（一）