Practical/Practical Exam/PL-SQL/P10 - Trigger.md

@@ -1,87 +0,0 @@
-# P10 - Trigger
-
-**Problem Statement:** Trigger: Write a after trigger for Insert, update and delete event considering following requirement:
-Emp(Emp_no, Emp_name, Emp_salary)
-a) Trigger should be initiated when salary tried to be inserted is less than Rs.50,000/-
-b) Trigger should be initiated when salary tried to be updated for value less than Rs. 50,000/-
-Also the new values expected to be inserted will be stored in new table Tracking(Emp_no,Emp_salary).
-
----
-
-## Creating tables:
-```sql
-CREATE TABLE Emp(
-    Emp_no NUMBER(14),
-    Emp_name VARCHAR(255),
-    Emp_salary NUMBER(14)
-);
-
-CREATE TABLE Tracking(
-    Emp_no NUMBER(14),
-    Emp_salary NUMBER(14)
-);
-
-```
-
-## Trigger
-```sql
-CREATE OR REPLACE TRIGGER P10
-AFTER INSERT OR UPDATE ON Emp
-FOR EACH ROW
-BEGIN
-	IF inserting THEN
-		IF (:New.Emp_salary < 50000) THEN
-			insert into Tracking (Emp_no, Emp_salary) VALUES (:New.Emp_no, :New.Emp_salary);
-			DBMS_OUTPUT.PUT_LINE('Inserting record with salary < 50000');
-		END IF;
-	ELSIF updating THEN
-		IF (:New.Emp_salary < 50000) THEN
-			UPDATE Tracking SET Emp_salary = :New.Emp_salary WHERE Emp_no = :Old.Emp_no;
-			DBMS_OUTPUT.PUT_LINE('Updated value of salary < 50000 for a record');
-		END IF;
-	END IF;
-END;
-/
-
-```
-
-1. After performing insertion operation:
-```sql
-INSERT INTO Emp VALUES (1, 'Tanmay', 45000);
-INSERT INTO Emp VALUES (2, 'Rajesh', 35000);
-
-```
-
-<details>
-  <summary>Output</summary>
-  1 row(s) inserted.<br>
-  Inserting record with salary < 50000<br>
-<br>
-  1 row(s) inserted.<br>
-  Inserting record with salary < 50000<br>
-<br>
-  Tracking:<br>
-  EMP_NO	EMP_SALARY<br>
-  1	45000<br>
-  2	35000<br>
-
-</details>
-
-2. After performing update operation:
-```sql
-UPDATE Emp SET Emp_salary = 43000 WHERE Emp_no = 1;
-
-```
-<details>
-  <summary>Output</summary>
-  1 row(s) updated.<br>
-  Updated value of salary < 50000 for a record<br>
-  <br>
-  Tracking:<br>
-  EMP_NO	EMP_SALARY<br>
-  1	43000<br>
-  2	35000<br>
-
-</details>
-
----

Practical/Practical Exam/PL-SQL/P7 - Age_calc.md

@@ -3,37 +3,34 @@
 ## Creating function
 
 ```sql
-CREATE OR REPLACE FUNCTION P7(
+CREATE OR REPLACE FUNCTION Age_calc (p_dob IN DATE)
-    dob IN DATE,
+RETURN VARCHAR IS
-    f_month OUT NUMBER,
+-- declare
-    f_day OUT NUMBER
+  ageOP VARCHAR2(255);
-)
+  years NUMBER;
-RETURN NUMBER
+  months NUMBER;
-IS
+  days NUMBER;
-	current_date DATE := SYSDATE;
+
-	year_diff NUMBER;
-	month_diff NUMBER;
-	day_diff NUMBER;
 BEGIN
-	year_diff := EXTRACT(YEAR FROM current_date) - EXTRACT(YEAR FROM dob);
-	month_diff := EXTRACT(MONTH FROM current_date) - EXTRACT(MONTH FROM dob);
-	day_diff := EXTRACT(DAY FROM current_date) - EXTRACT(DAY FROM dob);
 
-	IF (day_diff < 0) THEN
+  years := EXTRACT(YEAR FROM SYSDATE) - EXTRACT(YEAR FROM p_dob);
-		month_diff := month_diff - 1;
+  months := EXTRACT(MONTH FROM SYSDATE) - EXTRACT(MONTH FROM p_dob);
-		day_diff := day_diff + EXTRACT(DAY FROM last_day(add_months(SYSDATE, -1)));
+  days := EXTRACT(DAY FROM SYSDATE) - EXTRACT(DAY FROM p_dob);
+
+  IF (days < 1) THEN
+    months := months - 1;
+    days := days + EXTRACT(DAY FROM LAST_DAY(ADD_MONTHS(SYSDATE, -1)));
   END IF;
 
-	IF (month_diff < 0) THEN
+  IF (months < 1) THEN
-		year_diff := year_diff - 1;
+    years := years - 1;
-		month_diff := month_diff + 12;
+    months := months + 12;
   END IF;
 
-	f_month := month_diff;
+  ageOP := 'Given person is ' || years || ' years ' || months || ' months ' || days || ' days old.';
-	f_day := day_diff;
 
-	RETURN year_diff;
+RETURN ageOP;
-END;
+END Age_calc;
 /
 
 ```
@@ -41,13 +38,8 @@ END;
 ## Calling function
 
 ```sql
-DECLARE
-    years NUMBER;
-    months NUMBER;
-    days NUMBER;
 BEGIN
-    years := P7(TO_DATE('2003-12-02', 'YYYY-MM-DD'), months, days);
+  DBMS_OUTPUT.PUT_LINE(Age_calc(TO_DATE('2004-04-28', 'YYYY-MM-DD')));
-    DBMS_OUTPUT.PUT_LINE('Age: ' || years || ' Years ' || months || ' Months ' || days || ' Days.');
 END;
 /