SQL-294 - Insert into SQL table or update if exists

Author: abh1navv

sql-queries-7/insert-or-update-if-exists/merge-sql-server.sql

@@ -1,19 +1,11 @@
-CREATE TABLE employees (
-    id INT PRIMARY KEY,
-    name VARCHAR(50),
-    department VARCHAR(50)
-);
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
 
-
-INSERT INTO employees (id, name, department) VALUES (1, 'Alice', 'Finance');
-
-MERGE INTO employees AS target
-USING (SELECT 1 AS id, 'Alice' AS name, 'Accounting' AS department) AS source
+MERGE INTO Department AS target
+USING (SELECT 1 AS id, 'Computer Science' AS name, 'CSE' AS code) AS source
 ON target.id = source.id
 WHEN MATCHED THEN
-    UPDATE SET name = source.name, department = source.department
+    UPDATE SET name = source.name, code = source.code
 WHEN NOT MATCHED THEN
-    INSERT (id, name, department) VALUES (source.id, source.name, source.department);
-
+    INSERT (id, name, code) VALUES (source.id, source.name, source.code);
 
-SELECT * from employees;
+SELECT * from Department;

sql-queries-7/insert-or-update-if-exists/on-conflict-postgresql.sql

@@ -1,12 +1,6 @@
-CREATE TABLE employees (
-    id INT PRIMARY KEY,
-    name VARCHAR(50),
-    department VARCHAR(50)
-);
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
 
-INSERT INTO employees (id, name, department) VALUES (1, 'Alice', 'Finance');
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CSE')
+ON CONFLICT (id) DO UPDATE SET name = 'Computer Science', code = 'CSE';
 
-INSERT INTO employees (id, name, department) VALUES (1, 'Alice', 'Accounting')
-ON CONFLICT (id) DO UPDATE SET name = 'Alice', department = 'Accounting';
-
-SELECT * from employees;
+SELECT * from Department;

sql-queries-7/insert-or-update-if-exists/on-duplicate-key-mysql.sql

@@ -1,12 +1,6 @@
-CREATE TABLE employees (
-    id INT PRIMARY KEY,
-    name VARCHAR(50),
-    department VARCHAR(50)
-);
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
 
-INSERT INTO employees (id, name, department) VALUES (1, 'Alice', 'Finance');
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CSE')
+ON DUPLICATE KEY UPDATE name = 'Computer Science', code = 'CSE';
 
-INSERT INTO employees (id, name, department) VALUES (1, 'Alice', 'Accounting')
-ON DUPLICATE KEY UPDATE name = 'Alice', department = 'Accounting';
-
-SELECT * from employees;
+SELECT * from Department;

sql-queries-7/insert-or-update-if-exists/replace-mysql.sql

@@ -1,11 +1,5 @@
-CREATE TABLE employees (
-    id INT PRIMARY KEY,
-    name VARCHAR(50),
-    department VARCHAR(50)
-);
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
 
-INSERT INTO employees (id, name, department) VALUES (1, 'Alice', 'Finance');
+REPLACE INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CSE');
 
-REPLACE INTO employees (id, name, department) VALUES (1, 'Alice', 'Accounting');
-
-SELECT * from employees;
+SELECT * from Department;