From 997137287ee2ea93b5dc732fec269f4e851e8ab3 Mon Sep 17 00:00:00 2001
From: Kshitij <kshitijk@tuta.io>
Date: Sat, 9 Nov 2024 12:05:14 +0530
Subject: [PATCH] Added out params for function as per req. p.s. Thanks to
 Macho for providing the patch.

---
 .../Practical Exam/PL-SQL/P7 - Age_calc.md    | 56 +++++++++++--------
 1 file changed, 32 insertions(+), 24 deletions(-)

diff --git a/Practical/Practical Exam/PL-SQL/P7 - Age_calc.md b/Practical/Practical Exam/PL-SQL/P7 - Age_calc.md
index 62161a4..f634399 100644
--- a/Practical/Practical Exam/PL-SQL/P7 - Age_calc.md	
+++ b/Practical/Practical Exam/PL-SQL/P7 - Age_calc.md	
@@ -3,34 +3,37 @@
 ## Creating function
 
 ```sql
-CREATE OR REPLACE FUNCTION Age_calc (p_dob IN DATE)
-RETURN VARCHAR IS
--- declare
-  ageOP VARCHAR2(255);
-  years NUMBER;
-  months NUMBER;
-  days NUMBER;
-
+CREATE OR REPLACE FUNCTION P7(
+    dob IN DATE,
+    f_month OUT NUMBER,
+    f_day OUT NUMBER
+)
+RETURN NUMBER
+IS
+	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);
 
-  years := EXTRACT(YEAR FROM SYSDATE) - EXTRACT(YEAR FROM p_dob);
-  months := EXTRACT(MONTH FROM SYSDATE) - EXTRACT(MONTH FROM p_dob);
-  days := EXTRACT(DAY FROM SYSDATE) - EXTRACT(DAY FROM p_dob);
+	IF (day_diff < 0) THEN
+		month_diff := month_diff - 1;
+		day_diff := day_diff + EXTRACT(DAY FROM last_day(add_months(SYSDATE, -1)));
+	END IF;
 
-  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
+		year_diff := year_diff - 1;
+		month_diff := month_diff + 12;
+	END IF;
 
-  IF (months < 1) THEN
-    years := years - 1;
-    months := months + 12;
-  END IF;
+	f_month := month_diff;
+	f_day := day_diff;
 
-  ageOP := 'Given person is ' || years || ' years ' || months || ' months ' || days || ' days old.';
-
-RETURN ageOP;
-END Age_calc;
+	RETURN year_diff;
+END;
 /
 
 ```
@@ -38,8 +41,13 @@ END Age_calc;
 ## Calling function
 
 ```sql
+DECLARE
+    years NUMBER;
+    months NUMBER;
+    days NUMBER;
 BEGIN
-  DBMS_OUTPUT.PUT_LINE(Age_calc(TO_DATE('2004-04-28', 'YYYY-MM-DD')));
+    years := P7(TO_DATE('2003-12-02', 'YYYY-MM-DD'), months, days);
+    DBMS_OUTPUT.PUT_LINE('Age: ' || years || ' Years ' || months || ' Months ' || days || ' Days.');
 END;
 /