The document provides instructions for a database exercise using the students table. It includes: 1. Creating the students table 2. Sample data to insert 3. Instructions to insert the first 3 students using implicit insert and default values 4. Insert the next 3 students using explicit insert 5. Insert the last 3 students using explicit or implicit insert 6. Update the birthday of student 5 to the current date 7. Update the city of student 7 to Holon 8. Delete students 2, 4, and 6 9. Commit the data to the database

1. ‫תרגול‬‫פרק‬7–DML
1.‫צרו‬‫את‬‫טבלת‬Students‫ע‬"‫י‬‫העתקת‬‫הקוד‬‫הבא‬:
CREATE TABLE students
(studnet_id number(5) PRIMARY KEY,
student_name varchar2(25),
student_class varchar2(25) ,
student_birthday date ,
student_city varchar2(25) DEFAULT 'Tel Aviv')
2.‫להלן‬‫נתונים‬‫בהם‬‫יש‬‫להשתמש‬‫בתרגילים‬‫הבאים‬:
Student_idStudent_nameStudent_classStudent_birthdayStudent_city
1MosheA01-JAN-1994Tel Aviv
2YossiA01-FEB-1994Tel Aviv
3GilBNULLTel Aviv
4YuvalB09-DEC-1995Ramat Gan
5ShmuelBNULLRamat Gan
6AviANULLTel Aviv
7SnirA12-NOV-1995Tel Aviv
8AmirC12-SEP-1998Tel Aviv
9RoeeC17-APR-1994Ramat Gan
3.‫הכניסו‬‫את‬3‫התלמידים‬‫הראשונים‬‫ע‬"‫י‬Implicit Insert,‫במקום‬‫לרשום‬‫את‬‫שם‬‫העיר‬‫השתמשו‬‫ב‬-
DEFAULT.
4.‫הכניסו‬‫את‬3‫התלמידים‬‫הבאים‬‫ע‬"‫י‬Explicit Insert.
5.‫הכניסו‬‫את‬3‫התלמידים‬‫האחרונים‬‫ע‬"‫י‬‫משתני‬‫החלפה‬)Explicit‫או‬Implicit–‫לבחירתכם‬.(
6.‫עדכנו‬‫את‬‫תאריך‬‫לידתו‬‫של‬‫תלמיד‬‫מספר‬5‫ל‬SYSDATE.
7.‫עדכנו‬‫את‬‫עירו‬‫של‬‫תלמיד‬‫מספר‬7‫ל‬-Holon.
8.‫מחקו‬‫את‬‫תלמידים‬2,4,6.
9.‫שמרו‬‫את‬‫הנתונים‬‫באופן‬‫סופי‬‫ב‬-Data Base.

2. ‫פתרונות‬‫תרגול‬‫פרק‬7–DML
CREATE TABLE students
(student_id number(5) PRIMARY KEY,
student_name varchar2(25),
student_class varchar2(25) ,
student_birthday date ,
student_city varchar2(25) DEFAULT 'Tel Aviv')
-------------------
3.
INSERT INTO students
VALUES (1 , 'Moshe' , 'A' , '01-JAN-1994' , DEFAULT)
INSERT INTO students
VALUES (2 , 'Yossi' , 'A' , '01-FEB-1994' ,DEFAULT)
INSERT INTO students
VALUES (3 , 'Gil' ,'B' , NULL , DEFAULT)
4.
INSERT INTO students (student_id , student_name ,
student_class , student_birthday , student_city)
VALUES(4 , 'Yuval' , 'B' , '09-DEC-1995', 'Ramat Gan')
INSERT INTO students (student_id , student_name ,
student_class , student_birthday , student_city)
VALUES(5 , 'Shmuel' , 'B' , NULL , 'Ramat Gan')
INSERT INTO students (student_id , student_name , student_class )
VALUES (6 , 'Avi' , 'A')
5.
INSERT INTO students
VALUES (&s_id , '&s_name' , '&s_class' , '&s_birthday' , '&student_city')

3. 6.
UPDATE students
SET student_birthday = SYSDATE
WHERE student_id = 5
7.
UPDATE students
SET student_city = 'Holon'
WHERE student_id = 7
8.
DELETE FROM students
WHERE student_id IN (2,4,6)
9.
COMMIT
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