Merge pull request #324 from mauricemaina/main

How to upsert in PostgreSQL

Author: xaeldung

sql-queries-10/how-to-upsert-in-PostgreSQL/using-INSERT-…-ON-CONFLICT-pgsql.sql

@@ -0,0 +1,12 @@
+INSERT INTO Student (id, name, national_id, birth_date, enrollment_date, graduation_date, gpa)
+VALUES
+    (1717, 'Param Mohan', 1023456545, '2002-05-15', '2021-01-15', '2025-06-15', 3.50),
+    (1722, 'Alice Parker', 1098765432, '2003-02-20', '2022-01-15', NULL, NULL)
+ON CONFLICT (id)
+DO UPDATE SET
+    name = EXCLUDED.name,
+    national_id = EXCLUDED.national_id,
+    birth_date = EXCLUDED.birth_date,
+    enrollment_date = EXCLUDED.enrollment_date,
+    graduation_date = EXCLUDED.graduation_date,
+    gpa = EXCLUDED.gpa;

sql-queries-10/how-to-upsert-in-PostgreSQL/using-MERGE-pgsql.sql

@@ -0,0 +1,17 @@
+MERGE INTO Student AS s
+USING (VALUES
+    (1717, 'Param Mohan', 1023456545, CAST('2002-05-15' AS DATE), CAST('2021-01-15' AS DATE), CAST('2025-06-15' AS DATE), 3.50),
+    (1722, 'Alice Parker', 1098765432, CAST('2003-02-20' AS DATE), CAST('2022-01-15' AS DATE), NULL, NULL)
+) AS v(id, name, national_id, birth_date, enrollment_date, graduation_date, gpa)
+ON s.id = v.id
+WHEN MATCHED THEN 
+    UPDATE SET 
+        name = v.name,
+        national_id = v.national_id,
+        birth_date = v.birth_date,
+        enrollment_date = v.enrollment_date,
+        graduation_date = v.graduation_date,
+        gpa = v.gpa
+WHEN NOT MATCHED THEN 
+    INSERT (id, name, national_id, birth_date, enrollment_date, graduation_date, gpa)
+    VALUES (v.id, v.name, v.national_id, v.birth_date, v.enrollment_date, v.graduation_date, v.gpa);