Also, the action message output said 2 rows affected, which means one got deleted before inserting the other. It shows that customer_name and customer_place got changed in the row with customer_id=2. REPLACE INTO customer_data(customer_id, customer_name, customer_place) VALUES(2, "Hevika","Atlanta") Īction Output Message : 18:27:57 REPLACE INTO customer_data (customer_id, customer_name, customer_place) VALUES(2, “Hevika”,”Atlanta”) 2 row(s) affected 0.0023 secĭoing a select * again on customer_data gives the data as shown in figure 1.5. Observe the below query with an action output message received after running it. We will be using the same example from customer_data table. The difference is: If the new row to be inserted has the same value of the PRIMARY KEY or the UNIQUE index as the existing row, in that case, the old row gets deleted first before inserting the new one.
#MYSQL INSERT INTO IF NOT EXISTS ELSE UPDATE UPDATE#
Insert or Update into MySQL Table : using REPLACE INTO It says 2 rows affected as ON DUPLICATE KEY UPDATE displays the affected-rows value: VALUES(2, "Vaani","Denver") ON DUPLICATE KEY UPDATE customer_name = "Hevika", customer_place = "Denver" Īction Output Message : 14:26:12 INSERT INTO customer_data (customer_id, customer_name, customer_place) VALUES(2, “Vaani”,”Denver”) ON DUPLICATE KEY UPDATE customer_name = “Hevika”, customer_place = “Denver” 2 row(s) affected 0.0037 sec INSERT INTO customer_data (customer_id, customer_name, customer_place) Notice the query and the action output message. Let us now see what difference it makes using ON DUPLICATE KEY UPDATE. Duplicate entry ‘2’ for key ‘customer_data.customer_id’ 0.00047 sec INSERT INTO customer_data (customer_id, customer_name, customer_place) VALUES (2, "Vaani","Denver") Īction Output Message : 23:39:39 INSERT INTO customer_data (customer_id, customer_name, customer_place) VALUES(2, “Vaani”,”Denver”) Error Code: 1062. Using the classic insert statement, we will be getting an error, observe the query and the action output message. Figure 1.1 shows that this already exists. Now let’s say we want to insert the row with customer_id = 2. Insert or Update into MySQL Table : using On Duplicate Key Update Remove First and Last elements from Python List.Remove elements from List using pop() method in Python.Remove element with Maximum value in Python List.SELECT * FROM customer_details įigure 3 shows that both the records have been inserted to table customer_details.Looking for Something Search for: Search Recent Posts The concept is the same as having a subquery within the NOT EXISTS clause with an additional UNION query to join both the INSERTS. SELECT customer_name FROM customer_details WHERE customer_name = 'Jenefir'Ģ row(s) affected Records: 2 Duplicates: 0 Warnings: 0 SELECT 'Jenefir' as customer_name, '28 Canada' as customer_address
SELECT customer_name FROM customer_details WHERE customer_name = 'Suveer' SELECT 'Suveer' as customer_name, '28 Street North America' as customer_address
INSERT INTO customer_details (customer_name, customer_address)
Observe the below query for the solution. Let us take an example to add two rows for customers ‘Suveer’ and ‘Jenefir’ only if the records with names ‘Suveer’ and ‘Jenefir’ do not exist. What if we have more than one record to be inserted, and before every insert, we want to ensure that the record with the same column value does not exist. INSERT multiple record if NOT EXISTS in MySQL This time the record was not inserted as customer_name ‘Veronica’ already existed in the table customer_details. INSERT INTO customer_details (customer_name,customer_address)Ġ row(s) affected Records: 0 Duplicates: 0 Warnings: 0 Observe the below query and response message. Since the record exists in the table with customer_name=’ Veronica‘, let us again try and insert the record with the same customer_name. SELECT * FROM customer_details įigure 2 shows that the record has been inserted. Since there is a ‘ NOT‘ keyword before EXISTS keyword, the query will INSERT the row. If the row does not exist in the table, then FALSE will be returned. Here in the subquery with the NOT EXISTS clause, we are selecting the record from table customer_details. SELECT customer_name FROM customer_details WHERE customer_name = 'Veronica'ġ row(s) affected Records: 1 Duplicates: 0 Warnings: 0 SELECT * FROM (SELECT 'Veronica' AS customer_name, '552 NewYork USA' AS customer_address) AS temp INSERT INTO customer_details (customer_name,customer_address)
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